Diversity and Climate Change Flashcards
Local diversity (alpha)
number of species in a relatively small area of homogenous habitat, such as a stream
Regional diversity (gamma)
the number of species in all the habitats that comprise a large geographic area
Beta diversity
the number of species that differ in occurrence between two habitats
Hypothesis 1 of biodiversity
glaciers during ice age made habitat less stable and drove back species
Hypothesis 2 of biodiversity
equilibrium between creating new species and species going extinct
Processes behind patterns of biodiversity
ecological heterogeneity
solar energy
precipitation
water temps in the ocean
More heterogeneity = ??
more diversity
Energy-diversity hypothesis
a hypothesis that sites with higher amounts of energy are able to support more species
A thicker greenhouse layer means ??
more heat retained
Albedo effect
- ice retreat
- local warming
- feedback (the cycle repeats)