Category: <span>Speculations on Natural History</span>

Speculations on Natural History

The Gravel Pit

About 50 years ago there was some gravel mined from a small pit in the corner of my prairie restoration field. I don’t think there was a seeding made afterwards, but it soon grew up to bromegrass, with a few willows and cottonwoods in the lowest area of the pit where there is a perched water table. I often use the pit to store my trailer and ATV and finally took a closer look at it last week when I was up gathering seed from the existing prairies. What I saw was a bit surprising.

The pit from 200 yards away. The water in the front is in the restoration; the gravel excavation was done in the hill behind.
A group of leadplant (Amorpha canescens) on the edge of the cottonwoods in the lowest part of the pit.

While the majority of the vegetation that has reclaimed the disturbed area is bromegrass, there are about 20 native species which have found their way to the site from nearby pastures. Some of these are the typically weedy species which blow around and colonize bare spots everywhere, such as Missouri goldenrod (Solidago missouriensis) and heath aster (Symphyotrichum ericoides), but many aren’t. There is a sizeable colony of leadplant in a protected area under the edge of the excavated hill. There are many dotted gayfeathers (Liatris punctata) which have blown in and colonized some of the poorest soils. There are bits of big bluestem (Andropogon gerardii) and plains muhly (Muhlenbergia cuspidata) fighting the good fight against the brome on appropriate sites. I found a couple prairie onions (Allium stellatum) which have somehow made their way over from my pasture. I even gathered seed for an hour or two from the gravel pit that I am spreading on the prairie restoration.

What will the gravel pit look like in 50 or 100 years? Will we have continued progress of the natives spreading from the prairies nearby, and from the restoration which now surrounds the site? Or will the brome push everything back out, perhaps advantaged by our increasingly wet climate. Even without the gravel excavation this is a xeric site, so it would be reasonable to hope that the more drought hardy native plants should have an advantage. Does this provide any lessons for the restoration field?

I think that one lesson is patience. Life will find a way to reach a new home. All the richness of our prairies developed over about 10,000 years since the glaciers melted and the climate stabilized at something approaching recent conditions. I am sure some researchers have determined about when our plant diversity reached maximum levels through pollen analysis, but my uninformed speculation would be that most of the plant community development occurred in no more than 2000 years. My restoration will be evolving to some sort of stability over the rest of my life, but will continue for long afterwards. I will obviously not know the final outcome of my restoration seeding, because there is no such thing. Which leads to the next lesson.

I need to be humble about my abilities to “create” a prairie. It has been suggested by multiple authors that those of us seeding restorations shouldn’t focus on the unattainable goal of a perfect, or an authentic restoration, but rather on the ecosystem services we wish to provide. What the hell would an “authentic” prairie restoration look like, anyway? Nobody truly knows. My stated purpose at the beginning of this process was to enlarge and buffer existing Dakota skipper butterfly habitat. That can fit under the broader umbrella of pollinator support. Then there are all the other insects, birds and mammals which will use the area (I have already been kicking up sharptail grouse and various sparrows, probably eating the weed seeds which I have grown. Carbon storage, water quality improvement and providing good habitat for bird hunters all add to the benefits. One benefit I personally care about is to increase the local genotypes of the xeric prairie species I have been gathering the seed of and spreading over the 100 acres. It pleases me to have an opportunity to give them a new home on the restoration prairie. I don’t think it helpful to have an image in my head that the restoration should match, because I doubt that I have enough imagination to see any image other than a pale approximation of the nearby prairie in my pastures. Rather, I will hope to see what develops over the next couple years and manage for my enjoyment, and to achieve some of these goals.

And this leads to the third lesson, which is that I already should be planning for management on the restoration. The gravel pit has developed some species diversity and distribution without any management. Could we have done better with active management? I will probably find out in a few years, because the gravel pit will probably get burned with the restoration field in a few years. In eight years, when the CRP contract has ended it will likely become part of a grazing system with the adjoining restoration. In the meantime I will be doing some weed control, both mechanical and chemical, and perhaps some remedial seeding. But I need to remember the second lesson, humility, as well. Perhaps the changing climate means that brome and Kentucky bluegrass are integral parts of the restoration 100 years from now, or perhaps some invasive grass that has not even yet reached South Dakota. I am 64 years old with health issues. I may not even see the end of the CRP contract and management will then move to other family members or to someone who buys the land, something over which I will likely have no control. In the meantime I will humbly do my best to guide the management to accomplish some of the goals I mentioned and perhaps some other goals I haven’t yet discovered. Its going to be a lot of fun!

Plains muhly working its way into a disturbed area
A lonely switchgrass plant in a sea of brome

Speculations on Natural History

Summer’s End

Hard times are coming. Time is short. Be ready or accept the consequences.

I am not trying to riff on a revival style preacher, but I had the opportunity to spend several days last week on my prairies and there is almost an ominous feel to the countryside. The growing season is not over; hopefully we have a month or more with green, but the landscape is tired. The native grasses are turning various shades of tan and bronze; leaves have damage from diseases, insects and hard weather. Most wildflowers are done blooming, and many have senesced and are disappearing. Goldenrods and asters, the flowers of fall, are still blooming, along with a few sunflowers and gentians, hurrying to develop viable seed. With time short some plants just put their heads into the harness collars and pull for the finish. With some luck, there will still be blooms for 2-3 more weeks and the season won’t slip away too soon.

Silky aster (Symphyotrichum sericeum) and gray goldenrod (Solidago nemoralis)
Aromatic asters on a hilltop
Sawtooth sunflower (Helianthus grosseserratus) along the edge of a draw
Downy gentian (Gentiana puberulenta)

Some other denizens of the prairie are also feeling the weight of the oncoming hard times. For much of August our hills were covered with blooming stiff sunflowers (Helianthus pauciflorus). It appeared that I would be able to pick many bushels of heads for seed, but the maturing heads become an opportunity for some residents.

A garden of stiff sunflowers and dotted gayfeather (Liatris punctata). Looks like a bountiful seed harvest to come.

I had always assumed that deer were the culprit, fattening up for winter by filling their stomachs with sunflower heads; and that may be true, but then I saw evidence of another, unknown suspect.

Whose pantry is this?
And this is what is left after someone decapitated these plants.

Most likely, pocket gophers are storing the heads, or shelling out and storing the seeds, as there are usually mounds nearby, but my friend Ben Lardy suggested Franklin’s ground squirrels. Whoever or whatever is clipping and gathering the seedheads does so without harming the plants, which are still waving in the breeze, headless. Waiting for Ichabod Crane, I guess. In any case, I still hope to gather a substantial amount of stiff sunflower heads, though they aren’t ready yet. We will see what is left in a couple weeks.

This mystery of the sunflower thief is a good example of what draws me to these hills. I am increasingly protective of my time at the prairies and sometimes almost desperate for the opportunity to immerse myself in prairie life. My mortality is like a garment I wear these days, and fall has become very poignant to me. My breathing, and thus my stamina, are touchy. My trach means that I am always a half step from pneumonia. The days I spent at the prairie last week were warm and sunny, but now we are in for several days of cold fall rain reminding me of summer’s loss. But even with the rain I am drawn to the prairie hills. They call me with a gentle song: “Come to us. Abide with us. Join with our warmth and our life. Commune with us and become whole”

Speculations on Natural History

My Other Restoration

All the posts in this blog have so far referred to 100 acres in the southwest quarter of my home section that I have planted (and am still planting) as a prairie restoration. I have not yet mentioned that I have also seeded 54 acres in the northeast quarter to a diverse native mixture as well. This post will discuss the seeding, what I hope to accomplish with it and why I have made the decisions that I have made.

The easiest way to discuss this seeding is to refer to the aerial images below, because it tells several stories.

This is a blowup of a 30 year old photo of the quarter showing every acre farmed except the tree claim in the northeast corner. This was always considered the best farmground we had, growing wheat, oats barley, flax, rye, millet and alfalfa while I was growing up (before we became part of the corn belt). Even in very wet years my father would just be patient and all the acres would dry up enough to raise a crop. Over the past twenty five years that has not been true.

This is a map of the CRP planted of the quarter. There is now a linear wetland that starts in the northwest part of the quarter and bisects it as it continues to the southeast. The crosshatching are the acres now considered wetland by the Soil Conservation Service. The wetland then enters a marsh in our farmyard which is at the bottom, right of the picture. Part of this linear wetland has not been farmed for 20 years or so. The waterway hardly flows, as it is almost flat, but it has a perched water table that is near the surface in dry years and hovers several inches above the surface in wet years.

What caused the soil layering that creates the perched water table? A recent advance of the Wisconsin glaciation stopped just west of my farm. As the ice melted a large area of poorly sorted outwash sand and gravel was laid down to the east of the melting glacier, covering almost 200 acres on the west side of my farm. The meltwater also left about 40 acres of better sorted sand and gravel on my northeast quarter as the water flowed southeast towards the Big Sioux River. Layering in these soils is not consistent, but generally there is a layer of silt 2-3 feet deep over a layer of gravel 10-20 feet deep which covers older glacial till, When I was growing up there was never enough excess water percolating down to fill this gravel layer ( in which the water very slowly travels underground southeast to the Big Sioux River). It has often been full the past 20-25 years, causing the linear wetland. About 15 acres that had been excellent farmland 50 years ago is often not farmable.

Though the waterway was obviously developed from glacial water flowing east, there is a divide in the northwest part of the quarter where water now flows back west. As a teenager I had tried to determine exactly where my own “continental” divide occurred, but the grade is so subtle that it was impossible. As glaciers melt there are interesting changes in ground elevation as the ground rebounds as the weight of the ice is removed. Many times I have wished to be able to travel back in time to see the drama and spectacle of those geologic forces.

What does all this have to do with my decision to plant 55 acres back to grass? First, because of the newly created wetland acres I was able to enroll in the continuous Conservation Reserve Program (CRP) at a fair rental rate. I am retiring the 15 acres of wet ground plus about 25 acres of the droughtiest gravel soils, with only about 15 acres of the better crop ground going into CRP. The remaining 100 acres of the quarter are productive soils which will remain as farm ground. Second, as I wrote earlier, there is very likely a slow underground flow beneath the CRP and I consider the CRP a small step towards cleaner water entering the Big Sioux River and thence the Missouri and the Mississippi. Third, the grass habitat will almost finish a grass corridor between the grasslands which occur to my west and the grasslands along the Big Sioux River. I don’t know what species might be helped by this connection, but prairie grouse come to mind. Fourth, though I don’t hunt anymore, the CRP could provide an area for pheasant and deer cover, and an area someone might wish to hunt.

So why aren’t I looking at this as a prairie restoration? The main reason is the shape of the CRP acreage. It is narrow and surrounded by crop ground. Herbicide drift will inevitably affect forb species in this field. The conservation district planted this in the fall of 2017. Though the planting job here was better than the job on my restoration field, I have topdressed parts of it with a seed harvested from a native prairie in Minnesota, adding 15-20 new species to supplement the 20 that were planted earlier.

I am not going to use any of the seed I have gathered on my relict prairies on this field, however, nor any expensive purchased forb species. While I have committed to spending a lot of money on the 100 acre restoration, I feel the need to limit expenses elsewhere; I will go all out on the restoration on the southwest quarter and be a bit more conservative on the northeast quarter.

Finally, some of this will probably return to crop production when the CRP contract ends. I have nine years to evaluate options and put together a plan, but I am likely going to leave a very generous waterway and allow the farmer renting the crop acres at that time to break up some of the better acres of the CRP. The majority of the CRP will likely be fenced and become a pasture, probably joined with the farmplace to the south where a water source will be easy to develop.

Again, what do I wish for my 55 acre CRP seeding that is not quite a prairie restoration? I hope it provides water quality protection, a pathway for sharptail grouse and upland sandpipers and a nice area for deer to bed. I hope to see warm season prairie grasses turning various shades of bronze and gold in the fall. I hope to provide some habitat for a variety of insects. I hope it will provide grazing and allow rotation with my native pastures, allowing better management of the native grass. And I really hope to enjoy walking through it during the time I have left.

Speculations on Natural History

Introductions

My introduction to prairie began when I was four or five years old and began to tag along with my older brother to bring the dairy cows home for milking. Almost every farm in our neighborhood milked cows and had a small pasture adjacent to the farm for the cows. Ours was bigger than most, a 50 acre mixture of native and tame grass. The native grass wasn’t pristine after 70 years of continuous grazing, but there were a surprising number of native grasses and forbs that were still scattered across the hills.

In April we engaged in the spring ritual of children everywhere, bringing the first flowers of spring home to our mother. For farm kids of the northern plains that meant pasqueflowers (Anemone patens), or Mayflowers as we called them. The first blooms of the spring emerged about April 15-20, the first stalks only two or three inches long. If it had been a cold night they would be brown from frost damage. There was little aroma, and they usually came with ants which were feeding on the pollen or the sap that oozed from the base. Still, my mother would make the obligatory fuss over us, her good boys bringing her flowers.

A group of blooms ready to go into a coffee cup for display

A short digression here: This Easter I had the good fortune to go up to my prairies with my daughter, Diane, and her boyfriend, Ebi. Spring was late with 20″ of snow and a blizzard on April 11-12, but a quick warm spell had melted most of the snow, and I hoped for the best. Here is what I found:

2-3″ blooms wherever one looks

My phone doesn’t have the capacity to show the scope of the bloom, but the reputed “superbloom” in the California desert this spring came to mind (the comparison is a bit inflated, I admit, but it really was a lot of pasqueflowers). This was as many pasqueflowers blooming as I had ever seen on these hills.

Note the snow in the upper left

I was even able to gather several ounces of seed for my restoration. The wispy, feathery plumes attached to the seed make great handles to pull the seeds from the head if you are lucky enough to get out before they blow away in the wind. With some help, I was lucky.

Mature pasqueflower seedheads

I have already spread the seed to add to the seed I gathered and spread last year. And of course we brought a handful of blooms back on Easter to display on the kitchen table. Though humble, they were glorious. If a boquet can be gathered in the future on the restoration that would be a success to cherish.

Returning to my theme, what held more interest as I got older was learning what could be gathered and eaten out on the prairie. Foraging wild foods is a hot topic among foodies these days, but the history didn’t start with Euell Gibbons in the 60’s. I was fortunate to have a rich source of knowledge in my Polish grandmother, Busha. Her parents had homesteaded when she was a toddler, and her family welcomed families of Native Americans to camp and trade. Some of what was traded were foods gathered from the prairie. It’s impossible to know how extensive the interactions were between Busha and the Dakota families, but she came to know how to use many native plants.

The most important target was breadroot scurfpea (Pediomelum esculentum), which we called wild rutabagas. The plant has a tuberous root, a bulb which begins an inch or two below the soil and is about two inches long. In order to harvest the tuber one has to dig a hole about four or five inches deep and broad enough to get a grip around the tuber to yank it out. Of course, at seven or eight years old that meant prying out soil and stones with my fingers. Getting two or three tubers exhausted my patience, and I would shove them in my pocket, peeling one to eat as I walked home.

A beautiful blooming prairie turnip

The flavor was bland, but pleasant; fibrous, with enough starch to give it a satisfying chew. As I got older, my intentions were to cook some tubers, or perhaps even make pemmican, but invariably I would eat the raw tubers before any of my bright ideas came to fruition.

In retrospect, it was probably a good thing that I wasn’t more proficient at digging prairie turnips as their reproduction is a bit slow, and even an eight year old boy could make a dent in a local population. I no longer find prairie turnips on the home pasture, but they are fairly common on the prairies bordering my restoration.

Last summer I found that they were also one of the more frustrating plants from which to gather seed. At maturity they break off at ground level and merrily tumble around, spreading seed as they go. I was probably able to salvage 100 seeds last year, and less this year, by picking up the determined travelers and shelling out the remaining seed. I will be surprised if I ever find any in my restoration.

The last plant I will mention is groundplum milkvetch, which Busha called buffalo beans (Astragalus crassicarpus). Buffalo beans, or groundplums, bloom early, and the fruits are juicy and tasty for a week or two. Though they look like little plums their taste is more like snap peas, if not quite as sweet. They quickly become tough and inedible.

A prolific groundplum

Many species of Astragalus and a closely related genus, Oxytropis, are poisonous. The locoweeds, or crazyweeds, are members of the lineage. Though I knew this fact even as a teenager, it never occurred to me to be careful in eating buffalo beans. Poisons are dosage dependent, and there might be a line one would not wish to cross. Still, plants which presumably disperse their seed with the help of hungry animals are unlikely to have poisonous fruits. In any case, I doubt that I ever ate more than five or six at a time, and remember no ill effects.

What causes one person to crave these experiences while another lacks the desire? While my grandmother imparted the botanical knowledge, it was my older brother who showed me how to dig a prairie turnip and how to find buffalo beans, and I am certain that we ate them together. Yet, though we came from the same place and the same formative experiences, he has only mild interest in prairies and in my restoration project. He encourages me when I tell him about it, but there is no visceral connection. It was also obvious by the time he was twelve that he was no farmer ( though he worked more diligently on the farm than I did) and he now lives in a suburb of Minneapolis.

My younger brother, on the other hand, really wants to get back to the farm sometime to see the project. He too lives in an urban area (Orange County, California), but as a kid he would choose to wander in the pasture with his free time. If we knew the combination of nature and nurture, of experience and education, which developed a deep connection to nature it would be easier to develop a new generation of conservationists. For my part I will continue with my little project and draw in who I can to the wonder I feel as I wander the hills.

Speculations on Natural History

Summer Seed Gathering

Two years ago, when I began planning for this adventure, I decided that I would try to gather some of the seed needed for the project, primarily to get plenty of black samson (Echinacea angustifolia), a major nectar source for Dakota skipper butterflies (Hesperae dacotae), a threatened species that was one of the drivers behind the project. During the late summer of 2017 I began gathering black samson, as well as leadplant (Amorpha canescens), another common favorite of mine. At the same time as I gathered my two main targets several other species would go into the pail, and I accumulated small amounts of several other species. It was enjoyable to be out gathering, and enjoyable to mess with the seed while drying and storing the seed.

My 2017 haul of leadplant seed, about 5-6 gallons

Over the winter I spent a lot of time working with Ben Lardy at the Day County Conservation District planning the official CRP seed mix. As we worked through the frustrating process he asked whether I was interested in using any of the seed he had gathered the past year. I told him that I was, and when he brought me the seed I began to look at seed gathering in a new way.

The seed was in containers of all shapes and sizes. He had a good sized tub of porcupine grass (Heterostipa spartea), a small jar of wood betony (Pedicularis canadensis), a Tupperware container of bottle gentian (Gentiana andrewsii) seedheads, a couple pounds of Canada anemone (Anemone canadensis) in a coffee can and a pound of Canada milkvetch (Astragalus canadensis) in a cloth bag with a drawstring. There was a shoebox containing groundplum milkvetch (Astragalus crassicarpus) pods gathered from the prairie I had accidentally burned. There was a small jar with false gromwell (Onosmodium molle) and another with a few seeds of prairie turnip (Pediomelum esculentum). I am sure I have forgotten several species, but you get the idea. Though Ben is interested in creating a small side business gathering seed, he was also gathering seed as a type of mindfulness, a way to be aware of and immersed in the environment.

While the concept dawned on me when I saw the collection of seed, it blossomed as I studied seed catalogs and websites looking to purchase seed. I ended up buying small amounts of 30-40 species from Prairie Moon Seeds out of Winona, Minnesota to add to the official seed mix and when the box was delivered I was more than a bit deflated. Now, to go along with the large, expensive lot of seed I had purchased to fulfill the CRP requirements (that I wasn’t very happy with) I had a small container of packets that had cost over $1000 that would not appreciably affect the composition of my restoration. I imagined what the field would look like with all of my purchased seed growing and what I visualized was a nice wildflower meadow, but not a prairie. And certainly not a prairie from Day County, South Dakota.

Then I looked at the seed that Ben and I had gathered and the metaphorical light bulb began blazing. I have spent all possible hours since gathering seed from my prairies, along with a couple small prairies owned by friends. The seed gathering has become an avocation independent of the needs of the restoration. It has become the vehicle to allow myself to learn about the landscape. In a sense it has become what a Buddhist might call a walking meditation, silencing my inner dialogue as I wander. Almost magically, a bit of this and a bit of that becomes two or three gallons of seed and a couple of very pleasant hours have gone by. I go home to put the seed in the little dehydrator ovens my wife purchased to dry feed samples and have the pleasure of handling and respecting the fruits of my labor. Each days haul is unimpressive, but in the end the containers of uncleaned seed filled a good sized freezer.

Almost all the seed that was gathered was spread over the restoration last November. Though most of the seed was blended into batches to be broadcast in a pull-type spinner spreader, I have also spent many hours walking around the 100 acres hand-spreading. Usually I did this because I was micro-siting the seed. There is no point in tossing prairie turnip seed in a mesic site, for example, nor prairie cordgrass (Spartina pectinata) on a hill.

A different problem arose with thimbleweed (Anemone cylindrica), prairie smoke (Geum triflorum) and porcupine grass (Heterostipa spartea). There is simply no easy way to mix them with other seeds. It takes the patience of Job to take a wad of thimbleweed or prairie smoke and pick out small groups of seed to fling up for a breeze to distribute. And porcupine grass weaves itself into balls of spiny hell that demand a good pair of leather gloves to painstakingly dismantle the structure and extricate a few seeds at a time. The picture below is of Ben working on a clump (note the spears in his clothing as the porcupine grass fights back valiantly), but most impressive was a large wad that self organized into a wreath that looked like an oversized crown of thorns. While the process of seeding the porcupine grass was not without satisfaction for the job accomplished, a walking meditation it was not!

Ben Lardy doing battle with porcupine grass seed. Victory is not certain.

I used last winter to evaluate what was done, decide upon which components of the local prairies were underrepresented or missing, and to come up with a plan to access those species. Below is a partial list of missing species and species that I have very little of, that I know are in my prairies and that I am hoping to gather this year:

  1. Flodmans thistle, Cirsium flodmanii
  2. Xeric sedges, Carex sp.
  3. Hoary puccoon, Lithospermum canescens
  4. Prairie sundrops, Calylophus serrulatus
  5. Textile onion, Allium textile
  6. Panicgrass, Dicanthelium oligosanthes
  7. Chickweed, Cerastium arvense
  8. Ball cactus, Escobaria vivipara
  9. Silverleaf scurfpea, Pediomelum argophyllum
  10. Green milkweed, Asclepias viridiflora
  11. Prairie ragwort, Packera plattensis
  12. Pennsylvania cinquefoil, Potentilla pennsylvanica
  13. Prairie larkspur, Delphinium virescens
  14. Prairie milkvetch, Astragalus adsurgens

There are good reasons why I was not able to gather significant amounts of these and some other species. They are either 1. Widely scattered, 2. Poor seed producers, 3. Species whose seeds disperse quickly after reaching maturity, 4. Species which senesce and break off or become invisible at seed maturity, or 5. Some combination of the above. For many species there is basically no “Goldilocks” timing to gather seed: you are too early, too late, or both. This means that I am unlikely to gather much of any of these species this year either. Hopefully, though, with greater knowledge of plant locations and phenology, and emphasis upon key species, I can do better. For instance, this year I have successfully gathered a fair bit of textile onion. There is not enough to greatly affect plant composition on even a good sized hill, but one can hope that even a few plants will provide a platform so that there is germplasm available to spread and increase should the conditions allow. Many of these species are specific to a particular site (mostly very thin soils/xeric conditions), and I will be spreading them by hand soon after gathering. It is humbling to gather seed for hours and only end up with a handful, but occasionally one needs to be humbled.

In situations like this I am torn between scattering the seed as widely as possible on appropriate sites and a more targeted seeding in fewer, more concentrated areas. That certainly appears to be how many species are distributed, in patches. My difficulty is a lack of confidence in my ability to pick where to start the patches. Perhaps I am best off getting a few seeds widely scattered and hope for the best. In the end I will probably use both strategies for different species, guided by what I observe in my native prairies.

If all goes well, by the end of this next year I will have around 140-150 species planted, of which about 100 are at least partially gathered from the surrounding prairies. This summer I will try to post a list of species planted, along with a list of species found in the restoration. And more pictures. Had I realized I might start a blog I would have been far more diligent documenting what I saw and did with pictures, but I have done better this summer, and perhaps I can even become a better photographer.

A little update since I wrote this; in addition to the textile onion, I have gathered small amounts of chickweed, ragwort and have started gathering prairie milkvetch. Though I have a few seeds of panicgrass, it is practically impossible to gather, as is puccoon (which is reputed to be difficult to start from seed anyway), I gathered a bit of two xeric-adapted sedges, failed to get any prairie sundrops and have decided that the flodmans thistle can take care of its own damn self and blow into my restoration the same way all the other thistles have. The ball cactus is something I will probably try transplanting next year. That leaves the green milkweed, the cinquefoil and the larkspur to gather small amounts of in August.

I have had some luck gathering three other species whose potential populations I would like to augment. Over the past couple weeks I have gathered every alumroot (Heuchera richardsonii) seedhead I could find: and with some help I have been able to gather a fair bit of blanketflower (Gaillardia aristata) and slender milkvetch (Astragalus flexuosus). I have a good bit of blanketflower already in the restoration, but the phenotype (the visible characteristics of the plants) is quite different than my native blanketflowers, so gathering local germplasm seemed prudent. And I gathered slender milkvetch last year, but missed the ideal week and most pods had opened up and had already dropped much of their seed. This year my timing was better. I have also found several new patches of whorled milkweed (Asclepias verticillata) and hope to gather a fair bit of that.

About 1.5 gallons of slender milkvetch seedpods gathered last week

Then, in mid to late August the main event begins as all the summer blooming prairie species begin to mature seed. Its gonna be fun.

Pando the prairie dog ready for the late summer fun.
Speculations on Natural History

Mindfulness

Perhaps the most gratifying aspect of my prairie restoration journey has been the education I have received. I have learned a great deal about my prairies while gathering seed and while trying to understand the native prairies I am trying to model in my restoration. I clearly have a different relationship with those prairies than I did before. The revelation was just how freaking rudimentary my knowledge has been and still is. Creating the restoration has meant that I have looked much more closely at many plant species I thought I knew well, and learned about many species I had never noticed. That process obviously begins with simple identification, but continues with phenology, site fidelity and the plant and insect associates that each species live with.

An example: I have been aware that a penstemon grew in my prairies for a long time, but had never looked closely enough to identify the species or even notice its abundance. Last spring, now with an eye to creating my restoration model, I noticed a profusion of small white-bloomed penstemons across the tops of many of the most xeric hills. The white penstemon (Penstemon albidus) is one which I had never noticed in popular plant guides and which I have yet to find available from native seed purveyors. Pasqueflowers (Anemone patens) were also blooming on the same sites, but with little else having made significant growth, the 8-12” tall blooms stood out, even from a distance.

Then, two weeks later, I noticed a resurgence of penstemon blooms, but now with a hint of lavender or violet (I am a bit color challenged; not color blind, just color clueless). I soon realized I had a second species, slender penstemon (Penstemon gracilis). Both species grew in the same sites. They were usually in close association on the gravel hills with an entire suite of early blooming forbs: fringed puccoon (Lithospermum incisum), milkwort (Polygala verticillata), bastard toadflax (Comandra umbellata), yellow sundrops (Calylophus serrulata), a chickweed (probably Cerastium arvense) and yellow flax (Linum sulcatum), none of which I had ever looked closely at or identified before. Added to the early blooming species I did know such as ragwort (Packera plattensis), groundplum milkvetch (Astragalus crassicarpus), prairie violet (Viola pedatifida), prairie smoke (Geum triflorum) and pasqueflower, and the hills were a riot of color from April 25-June 15.

An assemblage of very humble, yet beautiful prairie flowers
Scarlet gaura on a hilltop
My cute little two inch tall cactus

Okay, so to call it a “riot” of color might be exaggerating, but to me it was still eye-opening. These were hills I had walked over for 50 years but had never seen before. Over the past 40 years my work has occupied so much of my time during the late spring and early summer that I had spent little time in my prairies. I would always go out to see the pasqueflowers emerge in late April, and by the time I turned around it seemed to be late July. Seeing the variety of blooms in May on these soil-less hills made me giddy. I have done some reading on Buddhist teachings and the concept of mindfulness has resonated with me. In the late 60’s the phrase you would see was, “Be here, now.” In the movie “Wayne’s World” Garth says to Wayne as he moons over an expensive guitar, “Live in the now, man!” Same concept, different contexts. I had been a really crappy Buddhist, not showing sufficient attention to my surroundings. The number of species that I didn’t know on one gravel hilltop, most not taller than a twelve ounce water bottle, gobsmacked me, as the British say. Even the ubiquity of prairie junegrass (Koelaria macrantha), a species that I thought I knew well, was a surprise. Parasitic plants such as bastard toadflax and downy painted cup (Castilleja sessiflora) were not in my purview, though it seems obvious in retrospect that parasitism is a reasonable strategy on a droughty, infertile soil. Another obvious strategy was investing energy in seed rather than roots. An extensive, deep root system really pays off in drought when you have soil for the roots to explore and exploit. When there is really no soil it is reasonable to live fast, die young and leave a lot of seed to grow in the empty spaces on the thin, gravelly soils.

This brings me back to my penstemons. More so than many plants they grow in patches. Often that occurs with rhizomatous growth, plants investing in clonal growth. However when I pulled plants of both penstemon species I found a shallow, fibrous root system, not rhizomes. The common thread, particularly for the white penstemon, was fidelity to extremely droughty soils. Some areas hardly deserve to be called soil, the soil forming processes have modified the gravelly parent material so little. I think that these penstemons turn spring moisture into a lot of viable seed, seed dispersal be damned. Life is fine if seeds drop right next to the parent plants on to the exposed mineral soil of these sites. The parents aren’t very competitive and may not live much longer anyway. This made me hesitant to gather a large percentage of the seed pods as it might affect the survival of the penstemon patch. Perhaps some of the seeds are dispersed by seed eating birds whose gizzards fail to grind all the seeds. This is all obviously speculative, but I think those two penstemons, again, particularly the white, use the strategy of an annual to thrive on a very tough site.

Beauty on a hilltop

Life is ephemeral

Continuity may not mean that I myself continue

But oh, to wave in a cool wind on a spring day

And build a future for another May

Am I talking about the penstemons or creating a metaphor for an old farm boy? A bit of both perhaps.

Speculations on Natural History

The Ghosts of Evolution

About twenty years ago I read a book called “The Ghosts of Evolution” by Connie Barlow. It discussed evolutionary anachronisms, plant characteristics which no longer make sense because the plant species is missing a partner for which the characteristic evolved. Specifically, the book referenced several trees with large fruits which no longer have an appropriate animal partner to eat the fruits and disperse the seed. The book is based upon an influential paper written in 1982 by Dan Janzen and Paul Martin (of Pleistocene overkill fame) about fruits found in Mesoamerican forests. The evocative title was backed up by an interesting book I would like to read again.

At about the same time as I read the book we were renting a small native grass pasture and stocking it with a few horses. After renting it for several years I noticed several prairie turnips (Pediomelum esculentum) growing in low moist ground by the gate. Seed dispersal for prairie turnips is accomplished by tumbling; when the plants mature they form an abscission layer at ground level, break off, and tumble across the prairie dropping seeds as they go. I am confident these seeds did not get to the gate by tumbling. The nearest turnips were over a quarter of a mile away with two sloughs in between. My money is on the horses, who spent a lot of time near the gate.

I realize that the establishment of those turnips was probably a fluke. Prairie turnips are not normally found in such wet areas. Still, it made quite an impression on me. While I can’t identify anachronistic characteristics in prairie turnips – they tumble around quite well – there are almost inevitably other plants that had fruits made to induce bison or elk or perhaps even the horses that roamed our continent until 10-15,000 years ago, to eat and disperse their seed.

A beautiful, expansive blooming groundplum

One plant I wonder about in this regard is groundplum, or buffalobean milkvetch (Astragalus crassicarpus). Are their seedpods an evolutionary anachronism? The pods do not seem to be consumed by any animal other than me, with year old pods often still around when the plant is developing new fruit. Having me eat them is a waste of the plants energy because I eat them long before seeds are mature while they are still tender and sweet, making me a crappy seed disperser – pun intended. It is confusing that they seem best to eat when seeds are immature; most fruits are tastiest at maturity when seeds are ready to germinate. At maturity buffalobeans are locked away in a tough seed casing. Perhaps the partner they are missing is a rodent; a ground squirrel who caches them and perhaps fails to eat all of them. Buffalobean milkvetch is common, at least in my neighborhood, so I am probably missing something. Still it seems a waste to see the year old pods all dressed up with no place to go.

Seeds from year old pods gathered from 5-6 plants

As I have written before, one impetus for my project was the discovery of Dakota skipper butterflies (Hesperae dacotae) on my nearby prairie. Not only mammals have been and are being lost as reproductive partners. Most of my land qualified for the CRP program as pollinator habitat. The money for pollinator habitat restoration has been driven by worries about honeybees and monarch butterflies. I doubt there would have been much demand for restoring pollinator habitat if the symbols were the Dakota skipper butterfly and native bees. A small irony is that my prairie restoration is partially supported by “colony collapse” disorder of honeybees, a non-native species I would prefer not to have by my restoration to compete with native bees.

To get back on track, I wonder how many native prairie species are missing, or have an insufficient number of pollinators. Pollinator relationships are not necessarily exclusive and many plants can be pollinated by wind-borne pollen, or self-pollinate. Truly efficient pollination however, may require a specific partner species. Could 100 acres of restored prairie indirectly improve the fitness of native prairie species in a larger landscape?

If there were prairie species that had an exclusive pollination relationship with an extinct pollinator we might never know. They are gone. The very existence of the plants we see implies that any partners that are essential still exist. Still, there is obviously a middle ground or the phrase “evolutionary anachronism” would never have been coined. There may be species just hanging on with diminished populations because of a lack of pollinators or seed dispersers. I doubt there is a robust research literature for all the native prairie species whose seeds I gather. Even in an area with a lot of native grasslands such as where I grew up, it is impossible to walk around without feeling the presence of ghosts.

I always circle back to the value of my prairie restoration beyond that of a “vanity project”. What ecosystem services will it provide? As much as I love prairie, I also love farming. My career’s work is helping farmers to raise crops more efficiently while improving their land. Some of the land that is in the restoration, perhaps 40 acres, is productive farm ground and I struggle with whether those acres should have been included in the restoration. I have mentioned the Dakota skipper several times, but I would like to determine what other benefits might accrue past helping one species. Might this project extend habitats for local plant genotypes that I am gathering seed from? Might it help pollinator species that could go on to help native plant species in the larger landscape? And if I add in carbon sequestration and water quality improvement, does this start to add up to something significant? I’m writing this post (and I do actually write every post longhand, at least two written drafts before it is typed) during a February blizzard and I have a bad case of cabin fever. While I am not exactly in an existential crisis, I am questioning all my assumptions. Why am I doing what I am doing? What grassland birds will be able to use my restoration? What insects nearby could use a larger territory to establish a population? Hell, what soil microorganisms in my neighborhood are looking for a new place to stretch their metaphorical legs? What future “ghosts of evolution” can I provide succor to? Blizzard dreams; I may as well dream big.

Speculations on Natural History

When is enough, enough? Part 3

I spent a couple hours yesterday walking around the restoration to spread some grass seed and ponder future management. It’s been a year since the original seeding and the results are coming into better focus. When I evaluated it last fall I felt that bridging in the tank of the drill that did the seeding left 50 acres, or half the field without seed, and only 25-30 acres well seeded (leaving the other 20-25 acres poorly seeded I guess). Further development and perhaps a more objective eye whittles the empty area down to maybe 20-25 acres and raises the better area to 50 acres. Time, and some help from the supplementary seeding that Ben Lardy and I did last fall have provided some encouragement. Still, there is a significant area that doesn’t look good. It is nowhere close to providing any of the ecological services that it has been my goal to provide. How do I make these 25 acres not suck? Therein lies what is becoming an existential dilemma.

To illustrate my concerns I stood on a bare knob and took pictures in all directions. Here is what I saw:

Most of what can be seen are invasive weeds: wormwood sage and marestail; go down the hill and we can add canada thistle, tall waterhemp and a variety of other weed species. Native perennial density varies from one plant per square foot down to one plant per 50 square feet. By any objective measurement this substantial part of the restoration truly does suck. What can be done?

Well, to begin with we have now seeded this area three more times in addition to the first seeding. We pulled a spreader over all of it last November, and then again about the first of May. Since then I (with some help from a couple hard working young women who are helping my wife and I out this summer) have spread supplemental grass and forb seed by hand over most of the area. Every time I think I am done I find myself ready to turn around to buy and gather more seed before I finish the thought. On these gravelly hills I have one more year to augment the seed bank and hopefully add some substance and depth to the restoration. There is still a place at the table, open spots for seedlings to colonize. In the valleys the weeds are thicker and more competitive, but I still hope that there is room there as well for seed spread later this year to have a chance. The fallback position is to start over, and with $500-600 per acre and countless hours of seed gathering invested I am not ready to do that. I also hope to get out there with a sprayer on the ATV to start doing some targeted control, though I know how difficult that will be. One can go crazy trying to control weeds in a situation like this. And finally, I will soon have a neighbor go across this with a mower.

The dream is that I will see a crescendo of seedling establishment building through the entire summer as all the seeds we have spread on the field (perhaps 30-40 seeds/ft2) break dormancy and begin to establish. In the dichotomy of optimists and pessimists I stand firmly holding a glass half full (and am always tempted to say it’s two thirds full). A lifetime of watching the world, however, prompts me to have a Plan C should my optimism be unfounded (Plan B has already been completed), and I am getting close to having plan C decided. In the meantime I will obsessively monitor the seeding and continue to collect seed from my existing prairies. I will end with a couple pictures to illustrate why I am optimistic.

The pictures above show areas that I evaluated as having very poor stands last summer. It is still not a snazzy stand, but along with the weeds are 10-15 species of natives that I seeded, and a reasonable hope that this will look like a full stand next year with the whole panoply of species as crowns expand, rhizomes run and new seedlings emerge. The optimist in me says much of the emptiest area can look like this next year.

I also made some observations on the CRP field I seeded 9 years ago. There’s a real “Rambunctious Garden” thing going on there as the natives I planted try to reach an equilibrium with the weeds and create something new. Then today I took a path where I saw Canada anemone (Anemone canadensis), northern bedstraw (Galium boreale), a spiderwort (Tradescantia sp.) and cudleaf sage (Artemisia ludoviciana), none of which were planted in the field. The anemone, the bedstraw and the sage only had to move 50 feet from nearby prairie, while the spiderwort may have been a “contaminant” in the original seeding. Given enough time and some gentle management and we might see many species move around and find new homes. Who knows what might happen in 50 or 150 years. It is certain that the evolutionary fitness of all the native prairie species has depended upon their abilities to move and establish themselves in new homes, and only our short term focus and short lives limit our ability to envision what can occur.

Native species doing their best to be weeds

And so I cling to my hopes. “Enough” has not yet been reached, and I have not yet given up on my goal of a diverse plant environment which will provide benefits for a long time. We have US Fish and Wildlife easements on adjoining ground and the hope is that we could offer some or all of the restoration field for easement consideration in the future. For some reason this reminded me of a line from Douglas Adams’ classic “A Hitchhikers Guide to the Galaxy”. An alien being becomes immortal through an accident and becomes so bored that he takes on the quest to personally insult every being in the universe in alphabetical order (if you haven’t read the book, you need to). When a killjoy informs him of the impossibility of the quest, even for an immortal being, he simply fixes the naysayer with a steely glare and says, “A man can dream, can’t he?” Well, I’m not sure where that apocryphal example fits in with my restoration blog, but I feel the urge to reply to the naysayer within my own brain, “A man can dream, can’t he?”

Speculations on Natural History

Fire, Part 3

After the success of my accidental burn in 2017 I was interested in accomplishing a well-planned controlled burn on a 20 acre prairie a half mile north of the restoration site in the spring of 2018. This prairie had been used as a pasture till the 1960’s, hayed intermittently for another decade, and then not used in any way for the past 40 years. It was a poster child for the need to manage prairies to save them, covered by thick stands of Kentucky bluegrass (Poa pratensis) and smooth brome (Bromus inermis). I had gathered some seed on this piece in the fall of 2017 and found native plant diversity and density to be disappointing, except on the droughtiest hilltops. There was no longer a fence to allow grazing and it is a very awkward piece to hay; the only reasonable choice for management seemed to be a lighted match.

I contracted with Ben Lardy, a Pheasants Forever employee who has been working with me throughout the process, to create a burn plan, and to gather and manage a crew to do the burn. With help from Pete Bauman, the range extension specialist for South Dakota State University (and an ex Nature Conservancy employee who had been part of many burns), Ben came up with a good plan that I approved. About May 20 the availability of the crew intersected with a perfect day and sufficient cool season grass growth to create a wonderful burn. Literally every square foot burned right to the ground during the well controlled fire. We would have a chance to see what could be accomplished.

A map of Ben’s burn plan. Black smudges are back burns. (Photo by Ben Lardy)
As it all winds down (Photo by Ben Lardy).
Ten days after the burn

The results can be evaluated over the two primary environments: xeric hills mostly covered by Kentucky bluegrass and mesic valleys with a thick stand of brome and Canadian thistles (Cirsium canadense).

The results on the hills were dramatic. The perfect conditions for the burn caught the Kentucky bluegrass about to head and did some serious damage to it. The native warm season grasses which were there had the whole summer to grow before the cool weather of the fall allowed vigorous bluegrass growth. The blue grama (Bouteloua gracilis), released from bondage, made spectacular growth, pushing out many two inch long seedheads. I’m assuming that some of those seeds fell into openings created by the fire which will allow new seedling establishment. Apart from the new seedlings, the blue grama will undoubtedly expand because of crown and root reserves built with the summer’s carbohydrates.

Off the crest of the hills in the less xeric conditions many bunches of prairie dropseed (Sporobolus heterolepis) used the opportunity to expand. I had hardly noticed dropseed in the past, but thick clumps of four foot tall seedheads and the attendant vegetative growth dotted the hillsides. There was enough seed that I felt free to gather a couple pounds, while still leaving plenty to drop.

A third warm season grass that will see long term benefits is prairie sandreed (Calamovilfa longifolia). I had noticed one large patch on a hillside for many years, obvious as a pale green area in the summer and a rusty colored circle after maturity. After the burn I saw many additional mini-patches expanding all over the hills, as rhizomatous growth turned what might have been individual plants into sizable patches. Seeds waved 5-6 feet in the air.

Ben Lardy with a very tall sandreed seedhead, almost 7′ tall

What was most dramatic, though were the gardens of wildflowers. Not only were there expanses of the usual suspects such as leadplant (Amorpha canescens), black samson (Echinacea angustifolia), dotted gayfeather (Liatris punctata) and stiff sunflower (Helianthus pauciflorus), but also smaller patches of silky aster (Symphyotricum sericeum), heath aster (Symphyotrichum ericoides), scarlet gaura (Gaura coccinea), whorled milkweed (Asclepias verticillata) and hairy goldaster (Heterotheca villosa). The poor pictures I have posted can only hint at what I saw. It was glorious.

A gaggle of gayfeathers

Unfortunately I can’t say saw similar results on the 4-5 acres of mesic soils dominated by brome. Forty years with no harvesting had allowed the brome to eliminate competition. In this area, a broad saddle between two ridges, brome and its unholy partner, Canada thistle, grew back as thick as they had been before the fire. On a ring around the top of the saddle, where the brome grades into the Kentucky bluegrass, clumps of dropseed, big bluestem (Andropogon gerardii) and indiangrass (Sorghastrum nutans) were able to expand, and hopefully continue to expand in 2019. Below is a picture of a large area of leadplant trying to work its way downhill into the brome.

Notably, one mesic forb did make dramatic growth, American licorice (Glychyrrhiza lepidota). There had always been a couple areas near the wet draw that bisects the site, but the short period of release from brome competition engendered racehorse rhizomatous growth. The rhizomes seemed to have grown 15 feet up the hill, though much of that was probably bud release on already existing rhizomes. Last fall when I was collecting seed it was quick work filling a five gallon bucket which turned into a pound of seed after shelling. If the snow had not been so deep this winter it would have been fun to get back there on a nice mid-winter day to fill a pail or two. Below is a view of what is now an acre of licorice.

If things go well this fall, I will have a neighbor, Andrew Butler, build a high tensile electric fence around the prairie and graze it in rotation with a neighboring pasture soon. My wife’s grazing project (She grazes 80-85 cows on a 340 acre block of native grass divided into 8 paddocks) has shown that you can decimate brome with repeated fall grazing, and hopefully Andrew and I can finesse the movement of his cattle to allow warm season grasses to recolonize the brome.

One negative result of the burn was the discovery of several patches of yellow toadflax (Linaria vulgaris) aka butter and eggs. I had never noticed toadflax on this prairie, but it was also released by the removal of cool season grass competition. I did some herbicidal control to keep the patches from spreading, but need to develop a plan for 2019. Toadflax is evil shit, and I may have to consider full chemical warfare to eliminate the patches, though I plan to seek advice before making a decision.

There is a third environment I have not yet mentioned, a linear wetland that bisects the prairie, and the edge of the slough it drains into. Though much of this had standing water when burned, the thick cover (mostly cattails) burned almost to water level. Obviously, a fire doesn’t have the same effect in this wet environment, but a variety of facultative wetland forbs grew along the edges and worked their way into the mass of cattails. I have limited need of wetland seed for my restoration, so I spent only a small amount of time gathering seed there, mostly swamp milkweed (Asclepias incarnata) and Joe Pye weed (Eutrochium maculatum). However, I do hope to spend more time there this summer, as my knowledge of wetland plants is limited and I would like to learn more.

Joe pye weed hanging out with some friends

Finally, I think it relevant to mention what I didn’t see after the fire. I didn’t see prairie junegrass (Koelaria macrantha) increase; I didn’t see pasqueflower (Anemone patens) increase (though it was interesting to see plants blooming in June after the fire). I didn’t find any groundplum milkvetch (Astragalus crassicarpus), prairie violets (Viola pedatifida) or puccoon (Lithospermum canescens). As might be expected from a late spring fire, I failed to help the cool season natives. This was a very different result from my accidental fire in early April the year before. Some of those cool season natives might be missing; this prairie is not as diverse as the neighboring prairies. But everything has a cost, and a failure to help the cool season natives was the fee I paid to attain the other benefits. This was probably the best that I could expect from a single fire event. Now I look forward to managing the 20 acres with grazing and look forward very eagerly to what will grow in 2019.

Speculations on Natural History

Fire, Part 2: Results

In my last post I discussed my very un-prescribed, un-controlled burn. Now it’s time to discuss the results of the burn on the prairie. As stupid as my accidental arson was, it was also something I had desired to happen. It occurred a month earlier than the idealized version my brain had imagined, but I now had an opportunity to see the results of a large experiment. A gust of wind had given me a gift and I needed to show appreciation for that gift by learning a few things.

First, I can elaborate the results on introduced cool season grasses: no effect. If a prairie manager wants to discomfit cool season grasses and benefit warm season grasses a burn should occur in May. The burn occurred in early April when there was still frost in the ground. Neither the Kentucky bluegrass (Poa pratensis) nor the smooth brome (Bromus inermis) had any appreciable growth. The world was still brown when the fire occurred. I doubt the fire gave significant advantage to native grasses. Even as I write this I can think of one possible exception. Porcupine grass (Heterostipa spartea), which is common on the better soils on this prairie, seemed to produce much more seed than usual. Whether it gained any competitive advantage versus the introduced cool season grasses is uncertain, though I am continuing to evaluate the effect.

The effects on forbs, however, were eye opening. The first example I observed was buffalo bean milkvetch (Astragalus crassicarpus), aka ground plum. Buffalo beans are not uncommon, but many crowns, heretofore hidden in and dominated by grass cover. rocketed out of the ground after the fire. Each plant produced many long stems covered in blooms. Unfortunately, I was not yet fully committed to seed gathering at that time, but thankfully my friend Ben Lardy came out one day to gather several gallons of pods. Had I invested more time and energy there might have been ten gallons more. Cool season forbs, ready to rock and roll in April and May would logically benefit from an early fire. The removal of the thatch (mimicking heavy grazing) also benefited the pasqueflowers (Anemone patens) which were blooming all over the hills by the end of the month.

Here is what happens after a burn. Craziness.

Another plant which seemed to benefit from the fire was leadplant (Amorpha canescens). The hayland hadn’t been hayed for several years and the 3-4 year old growth was getting woody. My assumption was that a fire hot enough to kill the buds on woody growth (which happened) would mean a year of purely vegetative growth from crown buds. To my amazement, new stems practically leapt out of the ground and produced large spikes of flowers, and then seed. I compared those plants to the plants on the one steep hillside which had missed the burn (saved in the nick of time, so to speak, by the Waubay Fire Department). On the undamaged old growth the three foot tall leadplant shrubs had just a few flower spikes each and at best produced 25% of the seed of the first year growth in the burned area. Similar, but less dramatic results occurred with several other forbs.

While I didn’t notice any difference in prairie turnip (Pediomelum esculentum) growth that summer, I saw something that was even more interesting the next year, 2018. While walking around the prairie last summer, a year after the burn, I noticed a great number of young prairie turnips over the hills. The most parsimonius explanation is that the heat of the fire broke the dormancy on seeds produced the past couple years, and that the lack of competition and access to mineral soil on the gravel hills (where even Kentucky bluegrass struggles to live) allowed a high recruitment percentage. Regardless, it was a treat to see so many plants establish.

I saw the same thing occur with the ball cactus (Coryphantha vivipara I think). There have always been a few cactus on the ridges, particularly in the roadcuts for the section line trail, but I had never seen many in the hayland or the pasture on the other side of the trail. I was afraid that the fire might damage those few existing plants. First, the removal of the scanty mulch on the ridges revealed many more cactus than I knew existed, though the fire had obviously killed some. Soon, though, the cactus that survived showed new growth, with each clump calving many new balls. Then, last summer revealed many new plants, single balls developing after probable seedling establishment in 2017.

A couple quickly expanding ball cacti after the fire

In summary, to my very uneducated eye there was no change in the amount or density of the introduced cool season grasses from my early April burn. Burning while frost is still in the ground removes mulch and lets the ground warm up more quickly in the spring, but doesn’t have the added benefit of causing the cool season grasses to “waste” root reserves and deplete their bud bank on early growth that burns off. It did, however, obviously give an advantage to a group of forbs, especially those growing on the more xeric sites, which produced more seed. As I did more research into price and availability of seed I realized that seed gathering needed to be integral to my restoration plan, not just a supplement. I gathered several pounds of leadplant seed and several pounds of black samson (Echinacea angustifolia) heads, along with a smattering of other species that came along for the ride. This also led directly to the decision to burn another prairie in 2018, the subject of the next post.

There is a postscript to the story concerning what I learned after gathering seed in 2018. Nothing is free. Several of the species which had prolific seed production in 2017, the year of the fire, produced much less in 2018. Buffalo bean milkvetch plants which might have produced 40 or 50 pods in 2017 only produced 10 in 2018. Perhaps too much of the stored crown/root reserves were mobilized to make the spectacular growth of 2017. The plants needed a year to build carbohydrate reserves and had nothing left in the bank after spending their reserves like drunken sailors in 2017. Alternating years of high and low fruit production has been noted in many tree fruits, from apples to olives, ever since cultivation began. The concept of carbohydrate partitioning, that a plant must “decide” where and to what use the food it makes should go because that food is a limited resource, means that you can’t have everything; there is always an opportunity cost.

In short, seed production in species which were prolific in 2017 were diminished in 2018, very noticeably in the buffalo bean milkvetch. Will seed production ramp back up this year? We will see. Conversely, some species which avoided the drunken sailor syndrome produced more seed last year, probably after enhanced vegetative growth built up food reserves, notably slender milkvetch (Astragalus flexuosus) and prairie onion (Allium stellatum). These are anecdotal observations, not controlled measurements, obviously, but that is how it appeared to me. And this now sets the stage for my next post describing my 2018 burn.