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| Description: Species Diversity = the number or variety of species in the world or in a particular region Species richness = the number of species Evenness or relative abundance = extent to which numbers of individuals of different species are equal or skewed Speciation generates new species and adds to species richness Extinction reduces species richness Immigration is the inmigration of a species to an area Emigration is the outmigration of a species from an area Extirpation is the local extinction of a species Ecosystem diversity = the number and variety of ecosystems Also encompasses differing communities and habitats Rapid vegetation change and varying landscapes within an ecosystem promote higher levels of biodiversity Ecotones = where different types of habitats intermix Picture Stats: Views: 287 Filesize: 95.87kB Height: 890 Width: 818 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=35763 |