Continued disappearance of the benthic amphipod Diporeia spp. in Lake Michigan: is there evidence for food limitation?

• Published in: Canadian journal of fisheries and aquatic sciences Vol. 63; no. 4; pp. 872 - 890
• Main Authors: Nalepa, Thomas F, Fanslow, David L, Foley III, Andrew J, Lang, Gregory A, Eadie, Brian J, Quigley, Michael A
• Format: Journal Article
• Language: English
• Published: Ottawa, Canada NRC Research Press 01.04.2006; National Research Council of Canada; Canadian Science Publishing NRC Research Press
• Subjects: Amphipoda; Animal and plant ecology; Animal, plant and microbial ecology; Animals; Biological and medical sciences; Changes; Crustacea; Defense mechanisms; Demecology; Diporeia; Dreissena bugensis; Ecosystems; Environmental conditions; Fatty acids; Food availability; Freshwater; Fundamental and applied biological sciences. Psychology; Invertebrates; Lakes; Mortality; Native species; Organic carbon; Population; Population decline; Protozoa. Invertebrata; Sand & gravel; Silica; Lake Michigan; Great Lakes of America; North America; America; Canada; USA, Michigan L; Population decline; Feeding; Amphipoda; Crustacea; Freshwater environment; Aquatic environment; Population survey; Arthropoda; Limitation; Population dynamics; Invertebrata; Food supply; Population density; Benthic zone

Benthic surveys were conducted in the southern basin of Lake Michigan and throughout the lake to assess trends in benthic populations, emphasizing recent changes in densities of the benthic amphipod Diporeia spp. and dreissenid mussels. In the southern basin, Diporeia populations declined 89%, 91%,...