BIO220H1 : Lecture 23.doc
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BIO220H1 Full Course Notes
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Lecture 23: climate effects on organisms, phenology, & We should see animal ranges to shift; match between organisms ranges of tolerance will be preserved. If it gets too hot, we expect migrations toward cold places. Latitudinal --> toward poles; up the side of the mountains. We"re seeing both of these shifts (altitudinal and latitudinal) Phenological changes flowering time will also change with climate. Ipcc rise --> 4-5 degrees over 100 years. Unclear whether the change is too fast for species to migrate or adapt --> more extinctions perhaps. Summer --> high elevation; winter --> lower elevation. Animals shift if their climate changes (know from petm) They"re bad at jumping and get caught and killed because of the barbed wire. Now there are safer fences, no barbs on the lower levels; pronghorn-safe fences placed by farmers but they still have difficulty to get through.
