Sunday, April 24, 2016

Out this Sunday morning via the NW Pond entrance. There I disturbed (twice) a young great blue heron fishing. It flew a short distance and returned. The red-eared slider was back, basking on the same log.
I brought the saw and worked to clear the trail to the East Pond of the large diameter snag that fell on a mature Viburnum and an elm.
I changed into my water boots and took the saw along the West Trail to clear an elm killed by beetles and Ophiostoma elm disease.
Continuing (splashing) south through ankle deep water,  I walked through the flooded western Woods and thought about the ecology of this becoming an intermittent wetland. Impact on earthworms, ants, spiders, other soil invertebrates, millipeds, annual herbaceous plants, forest stand composition.. all very interesting. Where will refugia for these be? What will they be? Stumps? Windthrow islands of raised soil? The higher sand dunes on the southside? How will recolonization happen, and how quickly? Again, a large population of mosquito larvae wrigglers enlivened the water but I did not see predators gerrids, dytiscids, odonates etc. Interesting opportunistic reproduction, rapid growth and feeding of wrigglers, then potential complete mortality if the shallow floodwater dries before wrigglers reach maturity.

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