The Slough

A busy life, the return of mosquitoes and then the ever more aggravating deer fly, have kept me from the woods -through which I must pass to get to the back slough. The slough, a small natural woodland basin bordered on its west by an old gravel pit, has become wetter over the last decade. Prior owners of the neighboring pit decided it would be more useful filled and so introduced a stream of trucks dumping their fill.  We believe this raised the water table and is the reason our woodland vernal pond supporting silver maples and green ash has become a permanent swamp; one that has dried, only temporarily, a couple of years out of ten. The last of the trees within its bounds has died and the aggressively spreading, wet soil tolerant canary reed grass has taken hold in the newly sunny slough.

Yesterday morning a meso-scale storm passing just to our north provided a strong draft and mosquito-free window to pass through the woods. The last time I gazed upon this rapidly changing two acres it was a pond pushing beyond its bounds. Now, the lower water table of summer has changed it to a burgeoning meadow; the remains of duckweed sitting on a crust of drying muck.

Canary Reed Grass, Phalaris arundinacea

Although I seeded a portion of the slough in December with what is called a detention mix, I'm not surprised to see an abundance of human-bred, hybrid canary reed grass, Phalaris arundinacea.

It is a surprise to see the blue flag, Iris versicolor, I planted two years ago continuing to bulk up, maybe even thrive, despite the competition from so much mad dog skullcap, Scutellaria lateriflora.

This sedge, "weeded" out of a wetland edge of a nearby lakefront residence, has begun to transform the northwestern edge of the slough. I hope to see it "make a stand" against the encroachment of canary reed grass.

I purchased seeds of another grass, prairie cord grass, but have been hesitant to distribute the seeds. It is a native, warm season slough grass that I intended to use as a foil to the cool season canary reed grass. Like canary, it spreads by rhizomes and can be aggressive. Although it grows all over Minnesota, further reading led me to think that the six to eight foot grass may not be the right choice. I'd rather be out ten dollars in seed than dealing with another grass, not currently present, that then spreads too widely. My curiosity, however, gets the best of me -I have tray-seeded a few to see how they grow.

As more storms approached from the north, I pressed on toward the little wetland to see how it has changed since the high water of late spring. Water sheds from the surrounding moraine, draining through two gullies, then filters through two wetlands to pool at the bottleneck that leads to our driveway culvert. Earlier this spring I cleared the growing stand of buckthorn from the floodplain surrounding the bottleneck. Dying ash and falling box elder have opened the canopy here, letting in more sun.

In early June I made an attempt to slow the spread of canary reed grass weakened by five weeks of flood waters. Wearing knee high rubber boots, I cut any grass growing along the perimeter of the open water with a weed trimmer. Although it has come back now that the water has receded, it has done so less vigorously -a rather minor victory. If I want to maintain open water here, or better yet, introduce sedge and other wetland plants, I'll need to continue to fight back the canary reed grass which has a stranglehold on much of the small wetland.

Last Saturday I spent an hour at a nearby natural landscape contractor's end of season native plant sale. Most of my purchases (only $2.50 per plant!) were infill for my prairie plantings, but I did buy a couple of wetland plants. Above, ironweed, Vernonia fasciculata, has a wetland indicator status of facultative (FACW). This means it usually occurs in wetlands -66 to 99 percent of the time. This wetland status and my failure to grow it successfully in my dry Brooklyn garden led me to choose the flood plain as its new home.

My other purchase, broad-leaved arrowhead, Sagittaria latifolia, has a wetland status of obligate wetland (OBL) which means that it occurs in wetlands nearly 100 percent of the time. This plant prefers standing water and at least partial sun, so I placed in the pool that collects at the bottleneck, a stones throw from the ironweed.

We've been in a very wet period, receiving several inches of rain over the last two weeks. The tropical air and daily storms are expected to last through the week. Over the last 24 hours we've received over 3 inches of rain, and another three plus within the last ten days, bringing the water table back up to where it was in late May. This morning, braving the mosquitoes, I ventured to see the arrowhead I planted two days back -but it is missing, most likely it has tipped over into the muck under the rising water.

Findings

I'd like to tell you what kind of Oak this impressive bark belongs to, but in age, among oaks, it is a challenge without leaves. No matter, this old, large oak is anchored near a clearing made by wind of storms and pressure of fungus and disease.

On the bark of a giant that had fallen last summer, I place garlic mustard just pulled. I keep it off the soil so that it properly desiccates, a lesson learned a year ago. Now committed to the project of eradicating the weed, I think of it as gardening, a task with its own time, that I can accomplish while out photographing the woods, searching for mushrooms or ramps, or completing some other woodland project. Away from fallen logs or large stones, I make piles so the mustard remains obvious to me later, as I check on its desiccation or dispose of it. Officially known as Garlic Mustard, Alliaria petiolata, I've pulled enough acreage of it now to refer to it as "skunk mustard," because its garlic-onion odor reminds me more of that mammal's funk. Click here for a concise and useful journal article on all things problematic with garlic mustard in North America.

This upland spot was (still is?) an oak and sedge stronghold for quite some time. Now cleared of its main shade oak, what may grow in these changed conditions? Its slopes are partially covered with Pennsylvania Sedge, Carex pensylvanica, and some Virginia Waterleaf, Hydrophyllum virginianum. I found these native strawberries, Fragaria virginiana growing in patches, too. A straight line trail runs through this location, with plenty of soil disturbance from quadrupedal hooves and nosing through leaves and soil for food. Maybe I could intervene beyond pulling weeds by giving some complementary plant a foothold. We tend to avoid plants consumed by deer and in this way we consume them by exclusion.

While pulling skunk mustard I stumbled upon this snake, a common Eastern Garter, Thamnophis sirtalis. Its reaction to my sudden presence was no reaction at all.

As I continued to hover, pushing my fingers into the dried leaves to pinch-grab below the prostrate brassica stems, concern took over. I let it be, moving on around a tree to grab more mustard.

Then I spotted two more, one with coloration slightly dull compared to the other, sunning themselves near their burrow. My leaf rustling was too much antagonism and the one to the right took off. Minnesota isn't known for its snakes, although I am happy to see them here in our woods. Along with our frogs and salamanders, they are an important indicator of the land's well-being.

It's been very dry so far this spring (and despite constant snow cover, the winter was short on snow). In our new climate reality, we anticipate extended dry periods along with excessive rains from thunderstorms. Because of the lack of runoff from non existant spring rains, I was able to navigate the entire small wetland, plodding across acres of dried, sun-bleached naples yellow grasses. I witnessed the garlic mustard making inroads into the wetland as well as an arm or two of Creeping Charlie, Glechoma hederacea. I also spotted considerable patches of Stinging Nettle, Urtica dioica growing among the garlic mustard, but also several feet farther into the wetland. There is a tree, likely an ash, rooted at the edge of the wetland but fallen into it that has continued to send up branches along its trunk. Under the tree's crown there is a muddy circle where only the plants, above, are growing. At first glance I thought "Marsh Marigold?" Maybe not. Thoughts?

I did make a soggy-footed attempt into the great wetland on the south side. I wanted to see the willows -the first pale greening of spring, up close, but I didn't make it far enough in to be truly rewarded. Underneath those grasses were channels and ponds of water still draining from a much larger supply of slopes than the little wetland to the north. I did see evidence of Swamp Milkweed, Asclepias incarnata, about twenty five feet from the wood's edge. The exploration of the wetlands, our sunny places, compels me to engineer a boardwalk (literally -cut logs, debarked and placed longitudinally, with boards run lengthwise between them). Future projects.

Closer to the house, on the dry slopes bloom Bloodroot, Sanguinaria canadensis. Maybe these can be planted in the clearing among the wild strawberries?

There have been many sightings of hawks, vultures, eagles, sandhill cranes, turkeys of course, and others to make seeing the more common birds seem, well, common. Yet the first robin of spring was worth pausing for, as well as bluejays and cardinals hanging together.

And while squirrels aren't on anyone's favorites list, they have yet to cause us any trouble, likely because their habitat is still largely intact. They do not come toward the house and didn't mess with last year's garden. This bounding fellow has a red head, feet, and tail. I wonder if it this one, from last fall, or a relative.

Foggy Bottom

The Little Wetland

I have many favorite spots at our place, but this one is high on the list. It is hard to fathom that we are stewards of such a place. The lower photo reveals a deer trail entering the wetland. I am considering a plank walk so that we can experience the wetland from within outside of winter.