The Nature Conservancy 2008-2009 vector digital data http://bios.dfg.ca.gov ftp://ftp.dfg.ca.gov/BDB/GIS/BIOS/Public_Datasets/600_699/ds658.zip Freshwater mussels are one of the most imperiled groups of organisms on the planet (Williams et al.1993, Strayer et al.2004, Strayer 2006, RŽEgnier 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 ( http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=23565 ). The purpose of this project was to develop a strategic survey design and to resurvey historical sampling sites (pre-1995) for the freshwater mussel Anodonta californiensis (Figure 1a), a Forest Service Region 5 sensitive aquatic bivalve mollusk. Although two other species belonging to different genera, namely the western pearlshell Magaritifera falcata (Gould, 1850) (Family Margaritiferidae, Figure 1b), and western ridge mussel Gonidea angulata (Lea, 1838) (Family Unionidae, Figure 1b), currently have no federal status, there is a concern that their populations and distributions may be declining (Taylor 1981, Frest and Johannes 1995, Mock et al. 2004, Howard 2008). Therefore, surveys were conducted for these two species also to better define their status as a basis for evaluating whether they warrant any protections. All of these species may co-occur, so a survey targeting the regionally sensitive Anodonta californiensis, was effective in detecting whether the other two species were present. 2008 2009 publication date Complete None planned -124.184978 -113.747877 42.007351 32.728533 None Freshwater mussels Anodonta californiensis Magaritifera falcate Gonidea angulata ISO 19115 Topic Category biota environment inlandWaters None California Lake Del Valle Suisun Marsh W.F. Walker River M.F. Tuolumne River Truckee River Donner Lake Susan River Scott River Klamath River Shasta River S.F. Eel River Russian River Lost River Tule Lake Spanish Creek M.F. Feather River S.F. American River Clear Lake Napa River Sacramento River Dye Creek McCloud River Pit River S.F. Pit River Big Lake Fall River Tule River Hat Creek San Antonio Creek N.F. Stanislaus River N.F. Tuolumne River S.F. Tuolumne River San Joaquin River Pajaro River None None - Citation: Howard, Jeanette. 2010. Sensitive Freshwater Mussel Surveys in the Pacific Southwest Region: Assessment of Conservation Status. Prepared for USDA Forest Service, 1323 Club Drive, Vallejo, California 9459-1110. Jeanette Howard, Ph.D. The Nature Conservancy 415-793-2096 jeanette_howard@tnc.org If Dr. Howard can not be contacted as an alternative try: Joseph Furnish, Ph.D. U.S. Forest Service 707-562-8952 jfurnish01@fs.fed.us Microsoft Windows XP Version 5.1 (Build 2600) Service Pack 3; ESRI ArcCatalog 9.3.1.4000 Dataset copied. 20100527 16175900 Dataset moved. N:\Projects\Mussels\Working\Mussel_Site 20100527 17502900 Dataset copied. \\carogis.tnc\GIS\Projects\Mussels\New Personal Geodatabase.mdb 20100528 15433900 Dataset moved. N:\Projects\Mussels\fromBrian\Mussel_Sites_2009_Final 20100528 16343400 Dataset copied. P:\ds600-699\658-Mussel_Sites_2009\v1\v1_work\Mussel_Sites_2009_Final 20100908 11083700 Vector Entity point 160 Albers Conical Equal Area 34.000000 40.500000 -120.000000 0.000000 0.000000 -4000000.000000 coordinate pair 0.000000 0.000000 meters North American Datum of 1983 Geodetic Reference System 80 6378137.000000 298.257222 ds658 FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. FIELD_ID Unique identifier assigned to each site by field crew ZONE_ UTM zone for coordinates ECOREGION based on Freshwater Ecoregions of the World (www.feow.org) FOREST National Forest associated with site ("No" indicates site is not on National Forest SAMPLED Date that site was last sampled ("Historical" indicates records with no date) COUNTY California county name WATERBODY USGS naming convention for stream or lake HIST_SITE "Yes" = site recorded before 1995; "No" = site recorded after 1995 LOCALITY Brief description of site location OLD_LOCALE Brief description of location originally recorded for site COLLECTOR Initials of collector/surveyor (JKH = Jeanette Howard, SH = Steve Holdeman, LH = Lorrie Haley, JCB = Jane Brim Box MUSSELS "Yes" = mussels detected at site; "No" = no mussels detected at site HIST_SP Species historically documented at site (A = Anodonta californiensis, G = Gonidea angulata, M = Magaritifera falcata) CURRENT_SP Species documented at site during 2008-2009 survey (A = Anodonta californiensis, G = Gonidea angulata, M = Magaritifera falcata, 0 = none) HIST_REF Historical site reference (museum collections, publications, and collectors) HIST_DATE Date of historical site reference REC_SAMPLE "Yes" = recently surveyed; "No" = not recently surveyed UTMEAST X coordinate (easting) in meters UTMNORTH Y coordinate (northing) in meters Downloadable Data 0.004 20100914 FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile 201206201309560020120620