Aquatic Rare Amphibian Richness - ACE [ds2750]

Aquatic Rare Amphibian Richness, Areas of Conservation Emphasis (ACE), version 3.0.

Aquatic rare species richness is a measure of species biodiversity, and is one measurement used to describe the distribution of overall species biodiversity in California for the California Department of Fish and Wildlife (CDFW) Areas of Conservation Emphasis Project (ACE). Other measures of aquatic species biodiversity included in the ACE aquatic biodiversity summary are aquatic native species richness and aquatic irreplaceability. Here, rare species richness represents a count of the total number of rare aquatic species potentially present in each watershed based on documented species occurrence information. This dataset depicts the distribution of richness of all aquatic species in the state, both common and rare. The data can be used to view patterns of species rarity, and to identify areas of highest rarity richness across the state. Users can view a list of species that contribute to the richness counts for each watershed.

The aquatic rare species richness summary depicts relative diversity within watersheds across the state. To correct for differences in the number of taxa per taxonomic group, the data was normalized by taxonomic group (see Data Sources and Models Used, below). The aquatic native species richness by taxonomic group layers give a statewide overview of richness for each individual taxonomic group, showing counts of species per watershed for aquatic amphibians, fish, and aquatic reptiles.