ENV100Y5 Lecture 29: Env100 Mod 3 Lecture 29
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ENV100Y5 Full Course Notes
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Document Summary
Biodiversity provides goods and services (shelter, fuel, purifies air/water, generates and renews soil, pollinates, maintains genetic resources, provides cultural and aesthetic benefits, let"s us adapt) Plants: in response to herbivory they produce: cyanide, mescaline, nicotine etc. Eco-tourism: incentive to preserve natural areas and reduce impacts. Decreased biodiversity reduces natural systems ability to function and provide services. If same species are found in different habitats over a wide area then: y=a, b=1. If diff species are found in diff habitats over wide area: b>1. If most species are generalists b- is low. Amazon= not much change over 100 km for trees. High beta diversity: lots of produce, locally arranged. Implication for conservation: sloss: single large or several small. Biological dynamics of forest fragments project, manaus brazil. Factors that drive species richness: spatial factors: size, proximity, fragmentation, climatic: productivity and predictability, historical factors: evolutionary time. Habitat heterogeneity: larger areas have greater variety of habitats and niches.
