Geography 2320A/B Lecture Notes - Lecture 4: Water Cycle, Ecotone, Metapopulation

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Predator to prey ratio is higher in a less lush environment. Caribou migration out of timing with plant growth. Metapopulation: a set of local (sub) populations of a species that are linked by dispersal moung those populations (eg source-sink) Mainland-island population structure: one large population (low extinction risk) provides colonists for many small populations. Ecosystem: a set of abiotic and biotic components interacting in a given environment. Biome: a defined area if similar climate and vegetation type; it may contain different taxa in different regions. Body size of an animal is proportional to the energy use needed. Larger animals can withstand higher stress levels (high food reserves) Animals get bigger at poles due to the extreme conditions (ex foxes) Home range: where animals spend more of their time. Yellowstone np-wolves- video on ted talk (cid:862)tropi(cid:272) (cid:272)as(cid:272)ade(cid:863) Energy flow: photosynthesis digestions, assimilation, excretion respiration. Diversity tends to be highest at midpoint of success with new and old together.

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