EEB428H1 Chapter Notes - Chapter N/A: Biome, Hypothesis
27 Apr 2016
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Document Summary
Global biodiversity scenarios for the year 2100 summary. Scenarios of change of biodiversity predicted utilizing co2, climate, vegetation, etc. For terrestrial systems, land-use will have the largest effect, followed by climate change, nitrogen deposition, biotic exchange, and elevated co2. For freshwater systems, biotic exchange is much more important. Their definition of biodiversity excludes exotic organisms that have been introduced and communities maintained by agriculture. Derived three scenarios of future biodiversity for each biome based on alternative assumptions about interactions among the drivers of biodiversity change. There are no interactions among the various causes of biodiversity change. There are antagonistic interactions and biodiversity will respond only to the driver to which it is most sensitive. There are synergistic interactions and biodiversity will respond multiplicatively to the drivers of biodiversity change. Land use continues to be high in tropics and temperate forests. Least land use in arctic and alpine areas and in northern temperate forests where reforestation will exceed deforestation.
