Temporally Dynamic Reproductive Strategies and the Concept of R- and K-Selection

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Abstract
Numerous organisms inhabiting variable environments exhibit temporally dynamic reproductive strategies. Populations of such organisms demonstrate considerable variation in reproductive effort associated with environmental changes and thus shift between relative r- and K-positions on the r-K continuum. Failure to consider such dynamic strategies can result in misleading comparisons of populations and in incorrect interpretations of life-history strategies and corresponding selective pressures.