Lasting impacts

Heading towards the eastern edges of the Meramec River Hills, winding roads take a driver past deeply dissected dolomite and limestone hills associated with clear, fast moving creeks and rivers. Oak woodlands dominate here, punctuated periodically with old fields and cattle pastures; only a small fraction of the landscape is publicly owned.
This region is home to one of the largest prairie fen complexes in the Ozark Highlands, in acreage nearly as expansive as Grasshopper Hollow, the largest unglaciated fen in North America. Unfortunately, for many years, trucks and ATVs used the fen as a playground, causing serious damage to the flora and the hydrology. Much of the damage here occurred over 30 years ago, but the impacts are evident even today.
Stepping out into the rich, grassy prairie fen, one can notice undulations in the landscape--deep wallows where ATV operators and truck drivers rutted the land. Massive soil erosion occurred here during that time, and the foot deep ruts have permanently changed the natural water flow, causing wilting to occur throughout the fen despite the recent rain events. Long rivulets of water fill the ATV tracks in the fen, whereas historically, water fanned out across the whole area, thus supplying the grasses, orchids, and wildflowers like Queen of the Prairie with a constant water source.
In a valiant effort to repair the damage that occurred between 30 and 10 years ago, my colleague placed cedar logs wrapped in wood-based erosion control matting in the ruts to slow the flow of water and further erosion. Months after the waterbars were placed here, soil has accumulated and small tufts of sedges and grasses have colonized the ruts; the rivulets continue to flow at a very fast pace, shunting water away from the undamaged section of the fen. The wide creek that separates two distinct sections of the fen, officially designated as a State Outstanding Resource Waterway, suffers today from a significant pollution problem, likely caused by malfunctioning septic systems on the adjacent ridgetop or the introduction of cattle into the creek. The highly nitrogenous water so filled with yellow foam and green cyanobacteria that none of us wanted to cross here, separated us from the small pink splotches of orchids. Each of breathed deeply and tried stepping on less slimy rocks to cross the creek.

Very unlike the opposite side of the creek, this side of the fen looked like an eroded glade--exposed rock, gravelly substrate, small areas of vegetation perched on islands of soil averaging one foot tall. No waterbars or other erosion control solutions would ever work here, the landscape so severely damaged by truck and ATV traffic that the diverse fen flora barely holds on for life, clinging to the disjunct patches of soil. But it was on this side that I saw the last blooms of this year's grass pink orchid (Calopogon tuberosus), known from only a handful of locations in Missouri. Rhynchospora grows here, too, always a very exciting plant for fen lovers. A large population of Queen of the Prairie grows here, though I missed the showy blooms.

And yet, this area once had a regular, constant water source, and probably 5 feet of soil covering the area. It was undoubtedly mantled in a rich grass-forb layer, vegetation apparently so inviting to ATV operators and truck drivers that it was seriously damaged almost 30 years ago, never to recover.
Stepping off the fen, (happy to see the waterbars working, though recognizing it will take a decade for noticeable repair) we realize that even ten years from now, the rutted, unnaturally undulating landscape will always remain, the hydrology never to return to the pre-damaged state.
But positive impacts occurred here recently, too, including a big prescribed fire earlier this year and a thinning project in the 1980s that opened the woodland enough for ample light to reach the floor. Beautiful, grassy woodlands and biodiverse glades host plants such as an enormous gentian whose flower stalk almost reached my shoulder.
A charming wilderness footpath leads the hiker through these managed woodlands along a curving trail for several miles, until we reached this:
An equestrian trail hooks up to the footpath, and for the next two miles, we walked the ridgetop because frequent equestrian use during wet weather has turned the hiking trail into a mud pit the width of Hwy. 19. It has been widely pronounced that when trails are opened to horses, a certain level of "acceptable degradation" is to be expected. I think we've passed that point on this trail, and I can't fathom how or when the trail will return to the narrow, single-file trail that allow hikers to feel a sense of solitude in the natural world. Equestrian users of this trail were asked whether they would support trail closures during wet weather, and overwhelmingly they said "no." One even said that "the definition of 'wet' is different for everyone."
Having witnessed such extreme and irreparable damage on the fen, the creek and the trail system in the Meramec River Hills, I found myself thinking of the site of my bird survey, to the 3,000 managed acres that now have a serious deer problem impacting the biodiversity of the woodlands. I just wanted to go home, to my vegetable garden and backyard woodland over which I have some sense of control.










