Environment trumps predation and spatial factors in structuring cladoceran communities from Boreal Shield lakes
Abstract:Understanding local and regional controls on communities is a major theme in ecology. Are communities mainly determined by local environmental gradients, local biotic interactions, and (or) dispersal processes? To address this, subfossil Cladocera were enumerated from the surface sediments of 50 remote Boreal Shield lakes in northwestern Ontario, Canada, to examine three ecologically relevant explanatory categories. Variation partitioning analyses were used to test and quantify the unique and shared effects of local abiotic measures, local predation factors, and spatial variables as predictors of community composition. Thirty-nine taxa were identified and communities were typically composed of pelagic taxa, such as
Document Type: Research Article
Affiliations: 1: Canadian Wildlife Service (Ontario region), Environment Canada, 335 River Road, Ottawa, ON K1A 0H3, Canada. 2: Paleoecological Environmental Assessment and Research Lab (PEARL), Department of Biology, Queen’s University, Kingston, ON K7L 3N6, Canada.
Publication date: 2011-08-27
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