BIOL 1113 Lecture Notes - Lecture 4: Equilibrium Point, Crossing Lines, Niche Differentiation
20 Nov 2017
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Biogeography: biogeography = patterns in distribution, crosses ecological hierarchy, so we don"t put biogeography into hierarchy except alongside to show patterns of distribution are scaled, crosses temporal scale distribution of organisms is not static, changes over time. Profound changes over time, affects what we know about history of earth. Extinct, dramatic shifts in ranges (human tamper with environment) Influence of geological or more recent history on current patterns. Tropical > polar diversity: much more diversity there is in tropics compared to poles, many different ecosystems in tropics compared to poles, temperature difference, why, productivity relates to temperature/seasonality. Productivity is the amount of carbon taken out of atmosphere and taken into biomass per unit per time. H20 is much more available in tropics compared to poles, no machinery to run chemical rxns because of temp and h20. Intuitive; also incomplete: subdivide niches lots of something, there might be slight ways you can grab a subset of productivity for yourself.
