ZOOLOGY 260 Lecture Notes - Lecture 12: Monarch Butterfly, Commensalism, Subtropics
2 Feb 2017
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Document Summary
Pollution once seen as local problem, until acid rain & climate change made it global. Pollutants: co2 lasts 100 years (y); ch4 lasts 10 y; so2 lasts 0. 005 y. Concern over co2 for climate change but more over nox for human health. Vw & all clean diesel cars failed the e/. u. government"s test of emissions of nox. Poor dispersers(joshua trees) / long-range migrants(monarch butterflies) Tropical: past- more stable, species adapted to narrow climatic envelopes. Snow and ice specialist (wolverines, polar bears) Novel climates appear (residents are not adapted) Species assemblages and interactions (ie: habitats, mutualisms) may disassemble. Adaptable dispersers invade novel ecosystems (ie: pathogens, colonizers, commensals) Topical diseases are rising in altitude in tropical countries. Phenology- timing of life-history events in plants and animals. Temp-dependent phenology may change timing when mutualist species or food species are not yet present. Reef-building corals: ecosystem engineer that can"t shift altitude (poor dispersers.
