Data from: Toward a geography of omnivory: omnivores increase carnivory when sodium is limiting

Natalie A. Clay, Richard J. Lehrter & Michael Kaspari
1. Toward understanding the geography of omnivory, we tested three hypotheses that predict the proportion of animal tissue consumed: The Sodium Limitation Hypothesis predicts that omnivores increase animal consumption in Na-poor environments because Na bioaccumulates from plants to predators; thus, heterotrophs are Na-rich sources. The Nitrogen Limitation and Habitat Productivity Hypotheses use the same logic to predict more animal consumption in N-poor and productive environments respectively. 2. Omnivory is a common trophic strategy, but what...
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