LIFESCI 1 Lecture Notes - Lecture 13: Eurasian Lynx, Snowshoe Hare, Citizen Science
21 Jan 2015
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Interactions in ecology: biotic interactions: interactions among organisms, abiotic interactions: interactions between organisms and their non-living environment. School of fairy basslets correspond to what level of ecological organization? (organism, population, community, ecosystem, or biosphere?) Population (one species, one place/time: 2. ) Still out in the field, but in a more rigorous way: actually tracking/recording changes and finding correlations: field experiments, ecological experiment: scientific study designed to test a hypothesis, usually by manipulating the system. Scientists go out into the field and perform experiments by messing with how the system functions. Example: exclosure study: built a fence in a forest to prevent herbivores from eating it. Can see the impact of herbivores on this plant community huge difference between communities behind and outside the fence. Example: food supplementation: natural experiment: when a natural process perturbs the ecosystem dramatically, ecologists can learn by watching how the ecosystem responds. Example: mount st. helens, wa volcanic eruption.
