BIO120H1 Lecture : Lecture 23 notes
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BIO120H1 Full Course Notes
Verified Note
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Document Summary
Today"s global environmental problems: global warming & climate change, loss of biodiversity, environmental pollution, human famine. Spread of infectious diseases: human population growth. How do organisms respong to climate change: migration to favourable environment (ecology, adapt to environmental conditions (evolution, extinction (evolution) Art weiss : field mustard in southern california: measured natural selection, found evidence for directional selection in two population, favoured plants that flowered early, set seed, flower late, hit by drought and seeds are not set. Resurrection paradigm: collected seeds in 1997 and 2004 and compared them, made a cross between them www. notesolution. com. Loss of biodiversity is irreversible; most important process of environmental change: consequences are the least predictable. Most biodiversity is in poor, developing countries tropics. David tillman: the ecological function of biodiversity: measuring biodiversity in individual plant plots, manipulate amount of biodiversity, how resilient are these plots to things such as drought, diversity gives resilience to environmental perturbation.
