BIOA02H3 Lecture Notes - Lecture 7: Climax Community, Ecosystem Diversity, Niche Differentiation
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BIOA02H3 Full Course Notes
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Document Summary
Species x and species y interact interact negatively with one another when they are found together because they both rely on the same limited resources. Community structure: the number of species, their relative abundance, and the types of species are all aspects of community structure, ongoing debate about how predictable structure is. Spatial variation and biodiversity: spatial heterogeneity, environments that have more spatial heterogeneity have more microhabitats/microclimates within them (so can support more species, communities should show correlation between environmental heterogeneity and species richness. ) species richness is lower because environment difficult to adapt to: disturbance. Communities that experience intermediate levels of disturbance will contain highest possible species richness because more species can coexist within community. If disturbance is: frequent favours good colonizers, rare favours good competitors, intermediate neither is favoured, both types persist. The action of a predator can increase/decrease the biodiversity of an area.
