BIOL 345 Lecture Notes - Lecture 13: Ideal Free Distribution, Arctic Tern, Jet Stream
12 Nov 2017
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Habitat choice and territoriality where and why: macrohabitat: migration (usually seasonal and latitudinal, primarily for reproduction and or foraging. Within hemispheres whales, ungulates, insects, between n & s hemisphere (cid:894)e. g. songbirds, seabirds: swainson"s thrush and shearwater(cid:895) Bar tailed godwit (longest nonstop): they have sufficient caloric deposition that they can fly these distances without resting. Bar-headed goose (highest): flies up to over 7300m. High metabolic rate needs a lot of oxygen. Book lungs are very efficient with low oxygen levels at mountain height. Lepidopterans: flight orientation behaviours promote optimal migration trajectories in high flying insects. Leave at time when the stream carries them away and catch parallel stream going other direction: microhabitat: specific attributes of habitat (e. g. tree species, north side of a tree, upper canopy, end of branch, underside of leaf). Terrestrial habitats: animals choose both macro and microhabitat. Aquatic habitats: larval forms have little control over microhabitat but choose micro.
