Showing posts with label habitat. Show all posts
Showing posts with label habitat. Show all posts

Friday, May 15, 2026

Guest Post: Letting Habitat Restore Itself

It is a rare occasion when I invite someone to guest post here, but when I read the following social media post by Justin Thomas, I knew I needed to share his message formally. I will have a few comments at the end, but here let us first hear his experience, without edits.


”Here are the woods by my house near Springfield, Missouri, USA, after six years of doing absolutely nothing but letting nature order itself over time.

© Justin Thomas, May 9, 2026, 6:05 PM.

A brief history: This is the crest of a north facing slope that drops off dramatically in the background (photo facing northwest). The road you can see is called "Bluff Drive," because of the steep slope. To the south the hill flattens for 60 meters or so and then becomes a large flat grown over field. The field was obviously plowed historically and the woods, on the edge of the field, were cut-over, but not likely ever plowed. The earliest aerial photography I've seen is from the early 1960s, and the woods between the road and the field (the woods in the photo) had begun to grow back and are now some of the oldest woods within many miles. They were probably grazed until the mid-1970s when the houses on this dead-end street (now a mile outside of city limits) were built.

The woods are largely early successional trees like Black Walnut and Hackberry that germinated after the grazing and probably brush-hogging, or Euro-American burning. There are also large Black Oaks, Maple-Leaved Oaks, and Chinquapin Oaks that are likely sucker sprouts from the stumps of the original woods, or sprouts from the stumps of the sprouts of an earlier cut, that though the same size as the early successional trees, are decades older. This last point is important because though there are big oaks, they are not yet colonizing, nor can they because the damaged system is not what they colonize into. Still, I suspect in the next 20-30 years, left to their own devices, they will recruit back into the system.

© Justin Thomas, May 7, 2020, 6:07 PM.

The woods in the above photo (taken in 2020) are full of Buckbrush, Missouri Gooseberry, Clustered Black Snakeroot (Sanicula ordorata), and little else. These are hallmark species of former grazing, especially in woods. My family and I moved onto the property in 2016 and I immediately expressed my desire, my NEED, to get in and cut all the Buckbrush in order to open the woods for floral diversity. My wife asked me to leave enough to maintain the privacy it provided us and our neighbors. That's how thick it was. I was too busy and, let's face it, too lazy, to ever do it.

Turns out laziness has many rewards. In the spring of 2020, and the reason I took the photo, I noticed that there was less Buckbrush and Gooseberry than the year prior. Over the next couple of years that decline increased substantially every year. Six years later the Buckbrush, Missouri Gooseberry, and Clustered Black Snakeroot are almost completely gone. As these short-lived shrubs died of old age, and minus any further ecological damage that would allow their seeds to germinate and replace their parents, slowly more and more sedges, grasses, and forbs colonized the woods.

Let me rephrase that, because the sedges, grasses, and forbs were already there, just at very low densities (as is usually the case in such places). What I should have written was: as the woods became less suitable to Buckbrush and Gooseberry it became more suitable for the sedges, grasses, and forbs that had been eking out their existence at very low densities in the micro-scale nooks and crannies that had not been highly impacted. These kinds of population lulls also afford many species an escape from pathogens, so when they do have the opportunity to recolonize, their metabolisms are more geared toward reproduction than defense.

While this was going on, young saplings, and some larger trees that were suppressed under the larger trees, also could not maintain their metabolic needs and they died. This further opened the canopy and midstory, allowing light to power the ground flora metabolisms. Simultaneously, with less canopy and midstory, air moves around more and the site dries out faster, decreasing the fungal load (fungi are the number one seed predators), increasing insect activity, and aiding both wind and insect pollination.

The point of this story is that no human did anything to increase any of the wonderful clockwork things that happened and that are happening. The only human part of the story is the negative impact and subsequent abandonment. The powerline cut in the background, just before the road, has Bush Honeysuckle, Japanese Honeysuckle, Multiflora Rose, and Eastern Red Cedar. They, too, are declining. Why? Because this is what nature does. Damaged systems are colonized by species that thrive in the damage (largely driven by nutrient availability). When damage/disturbance stops, the nutrient availability declines and eventually the system becomes the sort of place where damage-dependent species cannot persist. This is why most damage-dependent species have short lives, long distance dispersal mechanisms, make lots of seeds, and have seeds that bank longer than stability-dependent species. It is a core natural phenomenon inherent to all living systems.

I'm sharing this because it isn't a freak occurrence. I see this everywhere, and I hope that after reading this you may see it, too. It is so beautifully encouraging to realize that so much of what we worry about in conservation/ecology comes from a lack of understanding of how magical living systems actually are. When we understand how they work, there is so much less to worry about (and so much less "work" to do).

This is my 30th year as a botanist/ecologist and the greatest joy of doing it this long is revisiting sites I've known for decades, and seeing them benefit vastly more from no human intervention than from too much human intervention. I don't see these healthful trends and trajectories in many places that are "managed". Sorry, I won't pretend that I do.

This idea is going to upset people. This is not the conventional perspective. I was resistant to it myself, but as someone whose job it has been to collect data and monitor ecological management, from thinning and fire to controls, this is a vastly overlooked truth of the natural world: that it can do it better without us.

Maybe that isn't fair. I'll rephrase: it can do it better when we appreciate and understand how it can do it better without us, AND we follow its lead and offer a bit of assistance. Not to get political, but when you love something correctly you ask for consent and anticipate your love's needs, rather than telling it what YOU like, what it likes, and forcing it to comply. Love, patience, understanding, and compassion are ecological principles, not freaky hippie nonsense.

I know a lot of woods that look like the 2020 photo. I'm so excited to see them when they hit the point of transcendence, and so happy to know that I don't have to do anything for it to happen.”


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What struck me from reading this is the concept of “disturbance-dependent” flora; and the idea that further disturbing a parcel of land, even in the act of removing invasive species, frequently makes things worse, or prevents reversion to natural conditions. Is this true in every ecological situation? No. Should it be considered in designing and implementing restoration and mitigation efforts? Definitely.

This is also the kind of philosophy we should be using in addressing all kinds of environmental, economic, and social problems. We have to start questioning the validity of the systems that are dictating certain ways of acting, and suppressing alternative methods. We cannot continue to use only profit and costs to determine the best solutions. “Scaling up” is not necessarily the best way to go. In fact, it might exacerbate the problem.

This blog respects dissent as well as validation, so please do not hesitate to enter your own thoughts into the comments, in a respectful fashion. Share *your* experiences. Thank you.

Justin Thomas is the co-founder and Science Director of NatureCITE, and the co-founder and Director of the Institute of Botanical Training. He has a BS from the University of Missouri and an MS in botany from Miami University – Ohio. He has 30 years of experience conducting ecological and taxonomic research, instructing plant identification workshops, and serves as a scientific advisor to several conservation organizations in the central and eastern United States.

Monday, July 25, 2011

Madrona Marsh

Freshwater wetlands in southern California have been shrinking for a long time, ever since draining them for development became profitable. Kudos, then, to the city of Torrance, California for preserving, and even enhancing, a wildlife haven called Madrona Marsh. The city park is named not for any madrone trees on the property, but for a neighborhood road, one of many named after various types of trees.

I had the pleasure of visiting the park on May 17 with my friends Kim Moore and Emile Feisler. Emile has been documenting the flora and fauna of the park in images for several years. We managed to add at least one new organism to his list while on our outing.

Like most parks in the Greater Los Angeles area, this one comes complete with a nature center. The displays were museum quality, and the building also had meeting space, a library, and offices. Across the street from the nature center is the actual preserve, fenced at present, the gate locked in off-hours.

The morning started under overcast skies leftover from rain the night before, but the clouds eventually gave way to a bright, sunny afternoon. Inclement weather by human standards is often just perfect for other organisms, though, and we found plenty of insects, birds, and other animals. One of the first birds we saw was a female Blue Grosebeak, in fact.

The marsh is actually a vernal wetland, fed by rains in the winter and spring. By the end of August the pan is dry, and remains so until the rains resume. This cyclic phenomenon means plants and animals must adapt to annual extremes of wet and dry. The area is also a “back dune” habitat that is part of the extensive El Segundo Sand Dune System. You would be hard pressed to find any physical feature resembling a dune, however.

Unfortunately, the preserve is not immune from non-native species, and in fact that is what dominates the landscape in many places. Argentine Ants have displaced most of the native ants, for example. There is also a leaf beetle from Australia that feeds voraciously on the equally-invasive eucalyptus trees.

The human history of the marsh has been varied. Native Americans and early settlers utilized the natural resources of the area. Since the 1920s, the marsh was used for oil recovery (southern California is studded with tar pits, not just the famous La Brea Tar Pits). Ironically, petroleum salvaging kept the area protected from commercial development. The Friends of Madrona Marsh, a non-profit organization established in 1971, worked with other community groups to galvanize support for saving the marsh as a wildlife habitat and passive recreation site. Lobbying efforts and legal wrangling paid off with the dedication of of 35 acres. Later, state funds were allocated to purchase another eight-and-a half acres. The City of Torrance took over stewardship of the park in 1986, helping to stave-off development as part of Park del Amo.

I highly recommend visiting Madrona Marsh. Keep an eye out for waterfowl and other birds, as well as Pacific Treefrogs, dragonflies and damselflies, and Fox Squirrels among the other wild animals that call this place home.

Thursday, July 9, 2009

Mow to Hell

Remember those foxes living behind my residence that I showed you about a month ago? Fat chance I’ll ever see them again. They are (were?) living at the edge of an enormous vacant area that is the former site of a pickle factory, long since torn down. The weeds, wildflowers, and sapling trees had grown up fairly tall, perhaps owing to the large amounts of rain we’ve been getting here in South Deerfield, Massachusetts. Well, apparently we can’t have any of that. Tonight I discovered that somebody in a tractor (the tracks were evidence of that) mowed the entire area. That act has effectively ruined my after-work life of exploring in these days when the sun lingers until around 8:30 PM.

Citizens of the United States have become entirely too good at destroying urban, suburban (and increasingly, rural) wildlife habitat in the name of cosmetic appearance and liability issues. It is this latter notion that has really gone over the top. God forbid that a mosquito carrying West Nile virus, or a tick harboring Lyme disease should be lurking in the tall grass waiting for some poor soul to walk by. We certainly can’t afford to have a dead tree fall on a parked vehicle, or the roots of a living one buckle the sidewalk where a person could trip and fall. We collectively no longer tolerate risk of any kind from natural sources.

Meanwhile, our culture celebrates stupid risk, be it the stock market, legalized gambling, or extreme sports. Nature must be conquered in eco-challenge reality shows, but the natural world must not be allowed to fight back.

Neighborhood associations and government municipalities are also keen on instituting codes of uniformity for the appearance of yards, gardens, lawns, playground structures, and the exterior of homes and buildings. The result is a sterilization of nature, the introduction of hoards of exotic ornamental plants and their associated insect pests, and the release of who knows how many chemicals into the environment from the application of fertilizers and pesticides.

Weed ordinances provide for stiff penalties if your grass exceeds a certain height, or the clover, daisies, and Queen Anne’s lace compromise the integrity of your lawn. Well, I am here to tell you that one man’s weed is another man’s wildflower. The clover actually benefits your lawn, by the way, by fixing nitrogen and making it available to the grass. As far as I’m concerned, though, the “weeds” are those very lawns, a blight of turf in a land meant for meadows and and glades

I have an idea for a cartoon I want to draw and submit somewhere. It starts with a panel depicting a man sitting on his front porch watching a conflagration in his yard. The next panel shows his neighbor rushing to the fence and screaming “Your lawn is on fire!” In the final panel, the man casually replies “It’s a prairie.” That will be the day my friends.