BIO120H1 Lecture Notes - Lecture 12: Biodiversity Hotspot, Phylogenetic Diversity, Insular Biogeography
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BIO120H1 Full Course Notes
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Bio120: biodiversity, extinction, and conservation biology (lecture 12) Responsible for getting us to be concerned about loss of biodiversity. Originated one of most important theories: theory of biogeography. Now you see mostly soya beans and crops. Trillium: nothing known about genetics or reproductive biology. Problems with studying: population shrinking due to urban development. These are all long terms studies where people have censused populations over years, people looking at various aspects of population biology (when do they lay eggs, when do they appear in the season, when do they flower) Fitted regression lines, in all cases there is a change happening. Days to flowering getting shorter, flowering earlier in season. Emerging earlier, laying more eggs, laying dates of first eggs earlier. Phenotypic response: is this heritable (genetic), is this evolution or just plasticity. Can drought cause rapid contemporary evolution by natural selection. Experiment: studied plants in same location in wet and dry year, observed over years.
