Environmental Science 3300F/G Lecture Notes - Lecture 9: Diversity Index, Ecosystem Diversity, Species Evenness
12 Dec 2017
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Document Summary
What is biodiversity: diversity of ecological entities from all sources, including terrestrial, marine and other aquatic ecosystems. Spans multiple scales: geners (genetic diversity, species (species diversity, ecosystems (ecosystem diversity) Species diversity is a term that is often used interchangeably with biodiversity but this is inaccurate. Pi: proportion of individuals found in the ith species. Tool that we can use for a group of species. Ecosystem diversity: variety of organisms in a given place, an ecosystem can cover a large area or a tiny microhabitat. Threats to biodiversity: the status of a species" survival depends on its resilience, location and the nature of what threatens them. Species" can get stressed: the level of stress is usually bigger for bigger animals, the most common threat to declining populations is the loss and degradation of habitat. International union for conservation of nature: world"s most comprehensive inventory of the global conservation status of biological species.
