Interspecific variation in the abundance, production, and emergence of Daphnia diapausing eggs.

Despite the ubiquity of dormancy among invertebrates, the demographic ties between the active and dormant stages remain largely unexplored in most systems. Nevertheless, dormant stages could potentially have significant impacts on the ecology and evolution of the active population. In Oneida Lake, New York, populations of the suspension-feeding crustaceans Daphnia galeata mendotae and Daphnia pulicaria produce large numbers of long-lived diapausing eggs, which accumulate in the sediments to densities of over 2.5 x [10.sup.4] eggs/[m.sup.2] for D. galeata mendotae and 8.0 x [10.sup.4] eggs/[m.sup.2] for D. pulicaria. Sedimentation rates obtained by 210Pb dating suggest that these eggs can ...

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