Macroinvertebrate communities of ecotones between the boundaries of streams, wetlands, and lakes
Patrick, Christopher J.
published: Dec 1, 2014
ArtNo. ESP141018503002, Price: 29.00 €
Boundary ecosystems may have a unique blend of characteristics and ecological communities. Nine different aquatic systems that span the boundary between lakes, streams, and wetlands were sampled in the Michigamme formation of northern-Wisconsin and the Upper Peninsula of Michigan to characterize the aquatic macroinvertebrate communities and environmental conditions. The streams had water quality values (conductivity: 17.1–162.7 μS, NO3 –: 0.077–0.11 mg L–1, PO4 –: 0.006–0.017 mg L–1, NH4 +: 0.27–0.39 mg L–1) that were in ranges indicating high quality un-impacted streams. Despite the high water quality, the streams were taxa poor (9–21 genera) and had low diversity (Shannon-Wiener: 0.65–2.19) relative to streams in nearby regions. Furthermore there was little biological variation (β-richness) between samples taken within each stream and also between streams. Macroinvertebrates were characteristic of stream, wetland, and lake habitat. Streams in this region appear to represent a boundary ecosystem between stream, wetland, and lake ecosystems. These streams appear to have naturally low taxa richness relative to other lotic habitats.