Restoration of the food web of an alpine lake following fish stocking

Trout stocking in the mid‐1960s eliminated the calanoid copepod Hesperodiaptomus arcticus and other large‐bodied crustaceans such as Gammarus lacustris, Daphnia middendorffiana, and Daphnia pulex from many alpine lakes in the Rocky Mountain Parks of Canada. H. arcticus frequently dominates the plankton communities of fishless lakes, preying on rotifers and nauplius larvae. Following the extirpation of H. arcticus, rotifers and small‐bodied cyclopoid copepods dominate the zooplankton assemblages of alpine lakes.

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