Waders!
Guess what hymnal I had stuck in my head all week?
Evidence of Beaver Activity
Beavers represent a pretty constant problem at Sherburne. They'll build dams in front of water impoundments as well as more natural locations along the St. Francis River and its tributaries. No matter where beavers build their dams, the end result is the same: they can greatly interrupt the flow of water around the whole refuge. When water levels become low, wetland ecosystems can suffer. This is a problem for the many species of birds and other creatures that live, feed, and nest in these environments. It is our responsibility on behalf of the refuge to maintain these habitats for those species.
Sally the Bio-Tech!
Sally Zodrow is the authority on all things related to water on the refuge. She's been at Sherburne for 15+ years, and has water maintenance down to a pretty exact science. Sally regularly monitors water levels and quality at multiple pools and river points on Sherburne, as well as the surrounding area. She also regularly monitors for beaver activity on her water rounds. When the dams become too developed, Sally clears the woody debris from the structure in order to maintain water flow. I helped Sally with this task this week, hence the waders (and impromptu whistled rendition of "Wade in the Water").
Turbidimeter
I also accompanied Sally on her water quality monitoring excursion. Sally monitors seven points along the portion of the St. Francis River that cuts through the refuge. Tests include analysis for electrical conductivity, turbidity (how cloudy the water is) and transparency, temperature, dissolved oxygen, and pH, as well as general appearance and recreational suitability. One of the instruments we used was a Secchi Tube, which totally reminded me of AP Environmental Science. Thanks Mr. Boyd! The information we gathered is shared with Minnesota's Pollution Control Agency (PCA), who, in addition to its staff, partners with volunteers through multiple monitoring programs in order to get a good picture of water quality across the whole state.
In my adventures around Sherburne, I've already come across a ton of plant species that I'd never encountered before. I'm learning their names pretty fast!
Sage
Wild Strawberry
Big Blue Hyssop
Hyssop smells like licorice when you crush the leaves!
Poison Ivy!
There's a lot of poison ivy around the refuge. Some people get the rash really bad, and others aren't affected at all! Apparently Sherburne's strand of poison ivy is particularly potent. Awesome. I've been trained on how to spot it, and am always generally alert in order to avoid it. Hopefully I never come into contact with it!
Cladonia Cristatella (Lichen)
Bonfire with the Roommates
Things are good on the homefront. Over Memorial Day weekend we roasted hotdogs around a fire. 'Twas nice!