Jennifer G. Howeth, Jerome J. Weis, Jakob Brodersen, Elizabeth C. Hatton and David M. Post Intraspecific phenotypic variation in a fish predator affects multitrophic lake metacommunity structure Ecology and Evolution 3
The presence and intraspecific diversification of the planktivorous fish alewife (Alosa pseudoharengus) yield coastal lake metacommunities supporting three food webs: lakes with anadromous, landlocked, or no alewives. Here, we study the relative effects of intraspecific phenotypic variation in alewives and plankton dispersal on multitrophic lake plankton metacommunity structure. Our results are among the first to highlight an important role for intraspecific variation in structuring metacommunities and indicate that intraspecific phenotypic variation in alewives maintains contrasting patterns of zooplankton and phytoplankton community composition, with impacts on local and beta diversity.
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