BIOB50H3 Lecture 14: Lec-14-Predation-and-Herbivory
4 Nov 2016
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Document Summary
Populations fluctuate around carrying capacity (small and large growth rates occur) Canada lynx (specialist predator for hares) and snowshoe hare: peak in snowshoe hare = peak in lynx and if one declines, so does the other with the. Hares decline even if food is plentiful and reproductive rate was negative, and physical conditions of hares worsening at low densities. Exploitation interaction: +/- one species benefits at the cost of another. Predation: predatory animals consume prey animals: consumers eat other consumers (animals, successful predation is fatal for the prey animal can cause a decline in population. Plants and prey must either: escape detection, escape being eaten, deter predators/herbivores, tolerate predation/herbivores. E. g: armor on insect, warning: colorful pattern on sea slug, mimicry: pretending to be dangerous (worm mimics poisonous coral snake too much energy needed to produce toxins, camouflage: insects and animals camouflage to escape detection.
