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Sustaining Biodiversity Presentation

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Chapter 5 Sustaining Biodiversity: the Species Approach The Status of Biodiversity biodiversity • the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species and of ecosystems. (from the Convention on Biological Diversity) • Inter alia = “among other things” Levels of Biodiversity • Within species – genetic diversity • Between species – species diversity • Between ecosystems – ecosystem diversity Levels of Biodiversity • Within species (genetic diversity) • i.e. How much genotypic and phenotypic variation is there within a species? • Ex: dog breeds, different sizes an characteristics but same species Levels of Biodiversity • Between species (species diversity) • i.e. How many different species are there? • Problematic since it’s hard to define all of them Species Estimates • 8.7 million species in the world (PLoS Biology estimates this) • 1 trillion species in the world (PNAS estimates this) Levels of Biodiversity • Between ecosystems (ecosystem diversity) • i.e. How many distinct ecosystems are there? Assessing Biodiversity Endangered Species Act A law established to protect species endangered or threatened with extinction CITES • Convention on the International Trade in Endangered Species • A set of laws established to regulate the ...
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