Naturalist Notes
summer 2008

by Nancy Schlimgen

Naturalist notes

 



Record amounts of precipitation characterized not only our winter but our late spring and early summer. Downpours in June in the Madison area, including here at Holy Wisdom Monastery, totaled 10.93 inches of precipitation. This is more than 2.5 times the
monthly average of 4.05 inches. In addition on June 8, we received 4.11 inches of rain which is the third highest value since 1896 records.*

The recent rains have tested the limits of Lost Lake’s water holding capacity, which fortunately increased significantly when the lake was restored. The North Prairie retention basin functioned as designed: to slow movement of and cleanse runoff water. This allows rain time to infiltrate into the ground or flow with less nutrients and sediments into Lake Mendota. In addition our upland native prairie and woodland vegetation cushions the erosive forces of water surging over the landscape. Water soaks into the spongy soil aided by the absorption of deep prairie roots, and over time seeps inward to replenish our life supporting groundwater.

 

When walking the Lost Lake Trail note where the Southeastern shores overflowed the path that leads to a few benches and the fore bay. The fore bay with its gabion rock structure collects water from impervious surfaces within the Fox Bluff neighborhood and usually filters it before flowing into Lost Lake. These rocks are usually visible, but in July they remain (six to ten inches) underwater. While the water has retreated from this grassy path area, there may be some soggy sections at times. As you watch where you’re stepping, movement afoot may lead you to bend down to take notice of tiny American toads hopping upland across these trails. Tadpoles active earlier in these shallows emerged protected from bullheads in these flood waters. The swollen shoreline hides the peninsula that is usually visible on the west shore. A painted turtle was also seen venturing uphill, possibly a female looking for a nesting site to lay eggs.

 

 

Naturalist notes

Naturalist notes

The impact from the rise in water level on the survival of flooded shoreline vegetation will be assessed in coming seasons. Recently a cottonwood tree on the western wooded shoreline tipped-over toward the lake, presumably during high winds associated with these rain events, because of their shallow roots in such saturated soils. I’ve subsequently have viewed the Great Blue Heron perched on the shoreline and in this tree. In addition a weeping willow branch impacted the railing of the observation deck, which is being repaired.

 

 

Five Canada Geese goslings can be seen swimming in formation between their parents. Red-wing Blackbirds call to their young as they skirt in amongst the prairies along the trails. Tree swallows perch on branches now in standing water after freely skimming the water’s surface to feed on this year’s plentiful mosquitoes.

Naturalist notes

Naturalist notes

Wildflowers or forbs of the prairie take center stage as they flower in a sequential series! Atop the Mendota prairie, for the first time since it was seeded in 2005-2006, a few plants of prairie phlox were seen early this summer and bunches of the cool season June grass turn golden by mid-summer.  On the lower slope and throughout the North Prairie penstemon flowers in June at the same time that wild white indigo blooms amidst patches of spiderwort, pale purple coneflower and coreopsis which give way to waves of ox-eye sunflower as seen throughout the prairies.

By mid-July the periphery of the Mendota prairie is recently planted with a fleeting, showy display of the biennial black-eyed Susan, destined to get replaced by the growth of nearby perennials in the future.  Also around this time patches of blue hoary vervain can be seen mid-slope on the Mendota prairie.  Hot pink Canada tick trefoil blooms tall along the entrance drive and throughout the lower portions of Mendota prairie and scattered in drifts throughout the North Prairie.  Other purple and white clovers bloom at this time joined by yellow coneflower, bergamot, and rattlesnake master.  Silphiums like compass plant with their yellow flowers dot the sky especially on the North Prairie. Compass plant leaves appear plentifully on the Mendota Prairie as well, hinting of their future presence. Related cup plant will brighten the shoreline edge of Lost Lake and adjacent edge of the retention basin in the North Prairie, along with purplish ironweed. Prairie and rough blazing-star blooms with magenta spikes in July through September depending on the specific species.

 

Naturalist notes

Naturalist notes

What draws your eye, however, might not be the flower but the butterfly that just landed on it, or the thirteen-lined ground squirrel that veers near, or a bird that flies by. Listen for bird songs, such as the distinctive whistle wheep of the Great Crested Flycatcher!  Look also for the Eastern Bluebirds or Kingbirds perched on posts with their white edged tail feathers and the black mask of the Common Yellowthroat. Nighthawks at dusk flash their striped undersides of their wings high in the sky. Fireflies dance above the prairies on mid-summer nights. White tailed deer have been foraging near the monastery with does bearing triplets and twins.  An eight point buck with velvety antlers gracefully dashed high through the North Prairie fence line when it sensed my presence.

 

The rains invigorate the prairie. Perhaps more noticeably as the tall grasses, like big bluestem, Indian and switch grass, flower later in July and reach heights exceeding 5 or 6 feet. More moisture creates favorable conditions for invasive woody shrubs or trees to advance into the prairie. Future management choices may include brush cutting with spot herbicide treatment of the stumps to set back such woody growth or a prescribed burn in the fall or next spring. Fortunately for us our intern crew arrived at the end of May and stay until mid-August, helping out weekly with these and other invasive species. They are joined by our Volunteer in Community participants and other volunteers, including youth groups throughout the summer.

Naturalist notes

The Oak Trail offers shady respite amidst hot summer sun with raspberries ripening in July followed by blackberries, bottlebrush grass, and woodland Joe-pye weed. Tall American bellflower edges the trail with their blue flowers before opening into the North Prairie.

Have you been exploring here on your own? Please share your on-site nature discoveries with me at nschlimgen@benedictinewomen.org.

May summer breezes cool your way to wonder and on-site nature discoveries!

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