Recruitment variation is believed to be an important mechanism of species coexistence in variable environments. This mechanism, however, is a composite of two other mechanisms: the storage effect, and ...
Most populations have some degree of variation in their gene pools. By measuring the amount of genetic variation in a population, scientists can begin to make predictions about how genetic variation ...
Evidence from twelve species of passerine birds points to higher heart ratios in high-altitude populations. Such variation in relative heart size, which might be expected on physiological grounds, ...
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