Macroinvertebrate communities of ecotones between the boundaries of streams, wetlands, and lakes

作者：Patrick Christopher J^*

来源：Fundamental and Applied Limnology, 2014, 185(3-4): 223-233.

DOI：10.1127/fal/2014/0645

• ecotone
• macroinvertebrate
• biodiversity
• wetland
• stream
• community

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 mu S, 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 (beta-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.

• 出版日期2014-12