Biology 2483A Study Guide - Final Guide: Juncus Gerardii, Distichlis Spicata, Spartina Patens
8 Dec 2016
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Document Summary
Organisms on earth get energy from feeding on others (exploitation one benefits, one directly harms . [potential to reduce growth, survival or reproduction of prey) Not all organisms fit into categories, some predators (wolves) also eat berries, nuts and leaves. Parasitoid: insects that lay eggs in another insect host. Sit and wait predators: barnacles, carnivorous plants, spiders. Predators concentrate efforts where high prey (wolf packs follow migration of elk, spiders relocate) Specialist predators (preference) lynx eat more hares then expected based on abundance. Some predators concentrate on prey abundant guppies ate which was more abundant form search image increase efficiency. Some cases: prey switching consistent with optimal foraging theory. Most herbivores feed on a narrow range of plants. Most insect herbivores feed on only one or a few plant species. Other herbivores (e. g. , grasshoppers) feed on a wide range of species. Large browsers, such as deer, often switch from one tree or shrub species to another.
