Gretchen Gerrish

Walking from my truck into work last week, I noticed a frail looking insect flitting along the surface of the snow on the trail in front of me. On closer inspection, it was a stonefly. Stoneflies are small insects that live most of their lives in streams and rivers, emerging only to complete their reproductive life cycle. Like stone flies, many aquatic insects, including many flies, mosquitos, dragon flies and damselflies have a life cycle that is partly in water and partly above water. But, most of these species emerge and take flight in spring and early summer.

As air temperatures in fall fluctuate between freezing at night and sunny 70 degree days, many deeper lakes within the region experience a phenomenon known as turnover. Journeying into the science of fall turnover can lead you into a wide berth of topics including physics, chemistry, thermodynamics, and biology. While complex and varied across systems, fall turnover influences how we use and interact with our beloved regional lakes.

Have you ever seen a bee emerging from a hole in the ground in the spring? There are many ground nesting bee species in Wisconsin and for this month's Field Notes, Gretchen Gerrish tells us more.

For this month’s Field Notes, Gretchen Gerrish of UW-Madison’s Trout Lake Station tells us of the life and death of leaves.

With wide eyes and anticipation, many stare to the skies on the night of December 24th to watch for the outline of a tiny sleigh and eight flying reindeer. But, how did Santa first come about?

It’s the second Tuesday of the month, which is when we hear from our commentators in the field.

This week, Gretchen Gerrish of UW-Madison’s Trout Lake Station tells us about darkness as a resource.