Patterns of richness by data type of California freshwater species.

<p>Maps show the number of native freshwater species when summarized by: (A) observational data recorded after 1980; (B) observational data recorded before 1980 or observations of extirpated populations; and (C) data that includes range maps, historical range maps, modeled habitat, professional judgment, critical habitat designations, and management area designations. Spatial data with an unknown observation date or unknown type are not included in any panel. The black lines on the maps represent the major hydrologic regions in the study area.</p

Taxonomic grouping and conservation rank of freshwater taxa endemic to study area.

<p>Percentage of freshwater endemic species by taxonomic groups that are considered vulnerable (at risk of extinction) in California watersheds. “Insects and other invertebrates” includes the classes Arachnida, Branchiopoda, Insecta and Polychaeta.</p

Taxonomic grouping and conservation status of freshwater taxa native to California.

<p>Percentage of freshwater species by taxonomic groups that are considered vulnerable (at risk of extinction) in California watersheds, “Insects and other invertebrates” includes the classes Arachnida, Branchiopoda, Insecta and Polychaeta.</p

Study area.

<p>The extent of the study area in California and the major hydrologic regions it contains. Inset shows the location of California in North America. Shaded relief is from “The National Map” by the U.S. Geological Survey.</p

Patterns of freshwater species richness by taxonomic group.

<p>Maps show richness of: (A) fishes; (B) herpetofauna; (C) birds; (D) mollusks/crustaceans; (E) insects and other invertebrates; (F) plants.</p

Patterns of richness and vulnerability of freshwater species native to California watersheds.

<p>Maps of (A) the number of native freshwater species in each HUC12 watershed (includes current, historic, range and modeled data). The range of species richness is shown in quintiles, therefore the darkest blue is the top 20% of species richness, the lightest blue the lowest 20%.; (B) percentage of species in each HUC12 watershed that are ranked as vulnerable; and (C) percentage of species in each HUC12 watershed that are listed as endangered or threatened under state or federal ESA lists. Maps in panels B and C share the legend on the right of the figure. The black lines on the maps represent the major hydrologic regions in the study area.</p

Location of hotspots.

<p>Comparison of the location of hotspot watersheds (top 5% by richness) for A) listed species with all non-listed species, and B) vulnerable but non-listed species.</p

Patterns of richness and vulnerability of freshwater species endemic to California, watersheds.

<p>Maps of (A) the number of endemic freshwater species in each HUC12 watershed (includes current, historic, range and modeled data). The range of endemic species richness is shown in quintiles, therefore the darkest blue is the top 20% of species richness, the lightest blue the lowest 20%.; (; (B) percentage of endemic species considered vulnerable in each HUC12 watershed; and (C) percentage of endemic species in each HUC12 watershed that are listed as endangered or threatened under state or federal ESA lists. Maps in panels B and C share the legend on the right of the figure. The black lines on the maps represent the major hydrologic regions in the study area.</p

Sources and criteria used to rank taxa.

<p>A taxon was classified as listed, vulnerable or apparently secure if one of the criteria conditions were met. For example, if a taxon is classified as endangered on the federal ESA list, we designated the taxon as “listed” in our database. Alternatively, if a taxon was classified as EN (endangered) in Moyle et al. 2011, we classified the taxon as “vulnerable” in our database.</p><p>Sources and criteria used to rank taxa.</p

Correlation matrix of the richness within each HUC12 watershed summarized by taxonomic groups.

<p>Correlation matrix of the richness within each HUC12 watershed summarized by taxonomic groups.</p