This is a Non-Federal dataset covered by different Terms of Use than

Mussel Sites - 2009 [ds658]

Metadata Updated: April 9, 2015

Freshwater mussels are one of the most imperiled groups of organisms on the planet (Williams et al.1993, Strayer et al.2004, Strayer 2006, R´Egnier et al.2009). Although western freshwater mussels have been declining as well (Taylor 1981, Hovingh 2004), recent surveys have not generally been conducted disallowing any clear indication of current compared to historic distribution and abundance. The California floater mussel, Anodonta californiensis Lea 1852 (Family Unionidae) was designated by the Forest Service as a Regionally Sensitive species in 1999. However, distributions of A. californiensis on public lands in California were poorly defined and taxonomic affinities across the western states were confused because of high genetic variability (Mock et al. 2004). This species has been a C2 candidate species for listing under the Endangered Species Act and is presently given a conservation status designation of "C3Q", meaning that globally there are probably no more than 300 populations in existence and that taxonomic problems preclude accurate assessment of actual conservation status. To address this data gap, surveys for A. californiensis and other Regionally Sensitive species have been conducted since 2001 (Brim Box et al. 2005, Howard 2008, Mock et al. 2010). Based on these earlier surveys, it became apparent that systematic surveys concentrated in specific geographic areas such as individual national forests would yield poor success in finding occupied sites (Howard 2008). Therefore during 2008-09, a strategic survey method was employed by prioritizing and revisiting locatable historic sites and water bodies to enhance chances of locating the dwindling number of extant populations ( ).

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Non-Federal: This dataset is covered by different Terms of Use than License: No license information was provided.

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Metadata Date January 1, 9999
Metadata Created Date March 14, 2013
Metadata Updated Date April 9, 2015
Reference Date(s) January 1, 9999 (publication)
Frequency Of Update

Metadata Source

Harvested from California Environmental Information Catalog

Additional Metadata

Resource Type Dataset
Metadata Date January 1, 9999
Metadata Created Date March 14, 2013
Metadata Updated Date April 9, 2015
Reference Date(s) January 1, 9999 (publication)
Responsible Party (Point of Contact)
Contact Email
Access Constraints Use Constraints:, Access Constraints:
Bbox East Long 0.00
Bbox North Lat 0.00
Bbox South Lat 0.00
Bbox West Long 0.00
Coupled Resource
Frequency Of Update
Harvest Object Id b42f9dcf-e04b-4ce7-863e-30b1fe028f7d
Harvest Source Id ac9a5a12-0348-49fc-ac7a-cc3aee201b04
Harvest Source Title California Environmental Information Catalog
Metadata Language
Metadata Type geospatial
Spatial Data Service Type
Spatial Reference System

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