22: Community Ecology: Species in the landscape
Local and regional diversity
Local diversity: The number of species in a relatively small area of homogeneous habitat, such as a stream. Also known as alpha diversity.
Regional diversity: The number of species in all the habitats that comprise a large geographic area. Also known as gamma diversity.
Beta diversity: The number of species that differ in occurrence between two habitats.
Regional species pool: The collection of species that occurs within a region.
Alpha
local diversity. the number of species in a relatively small area of homogeneous habitat, such as a stream
Beta
species turnover. the number of species that differ in occurrence between two habitats
Gamma
regional diversity. the number of species in all the habitats that comprise a large geographic area
Local and regional diversity
Measuring biodiversity
What do we measure?
Taxonomic diversity: the richness and abundance of species. Quantification of the number of species.
Functional diversity: the variety of growth forms or resource use strategies present in the community.
Phylogenetic Diversity: a biodiversity index that measures the length of evolutionary pathways that connect a given set of taxa
Local and regional diversity
Local diversity: The number of species in a relatively small area of homogeneous habitat, such as a stream. Also known as alpha diversity.
Regional diversity: The number of species in all the habitats that comprise a large geographic area. Also known as gamma diversity.
Beta diversity: The number of species that differ in occurrence between two habitats.
Regional species pool: The collection of species that occurs within a region.
Alpha
local diversity. the number of species in a relatively small area of homogeneous habitat, such as a stream
Beta
species turnover. the number of species that differ in occurrence between two habitats
Gamma
regional diversity. the number of species in all the habitats that comprise a large geographic area
Local and regional diversity
Measuring biodiversity
What do we measure?
Taxonomic diversity: the richness and abundance of species. Quantification of the number of species.
Functional diversity: the variety of growth forms or resource use strategies present in the community.
Phylogenetic Diversity: a biodiversity index that measures the length of evolutionary pathways that connect a given set of taxa