Biology 2483A Lecture Notes - Lecture 17: Edge Effects, Krakatoa, High Island
Document Summary
Distribution at local scales is regulated by physical factors and species interactions. Global and regional scale processes are to distribution and diversity of species on earth. Biogeography studies patterns of species compositions and diversity across geographic location. Amazon rainforest has 1300 tree species, boreal forest has 2) Generally, lower latitudes have more different types of species (warmer climates) Same community type or biome can have different species richness and composition in different location on earth. Spatial scales are interconnected in hierarchy, and species diversity and composition on one level affects oceans, continents bound by dispersal to that region (gamma diversity) by species extinction, speciation, dispersal. Species composition and diversity in a region vary based on how the landscape shapes rates of migration and extinction. Regional species pool provides an upper limit on species diversity for local communities species are important factors in the resulting species diversity (alpha diversity) region.
