The Outside World, In and Around Duluth

Stream Health

In Field Interp. yesterday, we tested for macroinvertebrates at Bagley Pond, the East and West branches of the Tischer Creek, and then Tischer Creek after the two branches converge.

image: University of Auckland

image: University of Auckland

Bagley Pond was the healthiest body of water. We found plenty of stickleback minnows, and lots of different  bugs – dragonfly larva, caddisfly larva, lots of snails, and a couple muskrats (okay, not exactly a macroinvertabrate).

The East Tischer Creek was also in good shape, over by Arrowhead. The West Tischer was in mediocre condition. We tested it behind the liquor store, and only found sowbugs. While sowbugs might normally indicate a fairly healthy stream, when they are found alone, that shows a problem. No competitors or predators means no diversity, which is no good.

After the convergence (pretty much right under Dominoes Pizza), there was a decent representation of diversity, but low numbers of everything.

It was raining for most of the class, but that certainly didn’t do anything to dampen my enjoyment. I’m having fun with Field Interpretation, and I’ll be sad when it’s done. I am realizing that, with every week, there’s an entire course that could be taught on the topic of that week.

Just how I like my learning – nice ‘n meaty.


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