U.S. Forest Service 2007 vector digital data http://bios.dfg.ca.gov ftp://ftp.dfg.ca.gov/BDB/GIS/BIOS/Public_Datasets/600_699/ds661.zip Freshwater mussels of the Klamath River community filter water, provide habitat and food for other animals and are culturally important to the Karuk tribe. Mussels are disappearing at an alarming rate in the United States and worldwide; more information on mussel biology and habitat is crucial for conservation. As part of the first comprehensive study of mussels in the Klamath River, we identified habitat variables important to mussel conservation and provided baseline data for future studies. We hypothesized that long term habitat stability affected the distribution and abundance of Gonidea angulata (western ridged mussel), Margaritifera falcata (western pearlshell) and Anodonta sp. (floater mussel) in the Klamath River. We predicted that mussels would more commonly inhabit stable areas like pools, bar edges and bedrock and boulder substrates than less stable areas. We found that substrate and river edge correlated with M. falcata and G. angulata distribution, but mesohabitat did not. M. falcata referentially inhabited boulder and gravel substrates whereas G. angulata lived in boulder and cobble; both commonly occupied stable bank edges. Our research suggests that river edge and substrate are important factors for mussel habitat, and that mussels prefer habitats that are stable for multiple decades. Continued research on the Klamath River mussels is necessary for effective monitoring and conservation of mussels as a cultural and biological resource. This study examines freshwater mussel distribution and habitat use in the Klamath River of Northern California. We snorkel surveyed forty sites for the presence of freshwater mussels and recorded three mussel genera (Gonidea, Margaritifera, and Anodonta), with Gonidea being most abundant, Margaritifera present in low numbers, and Anodonta present at a few sites at the upper end of our study area. Data collected during these surveys were analyzed in three senior theses at Whitman College in Walla Walla, WA (Krall 2010, Tennant 2010, and Westover 2010) http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=23771 , http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=23770 , and http://nrm.dfg.ca.gov/FileHandler.ashx?DocumentID=23772 respectively. 2007 publication date Complete None planned -123.684113 -123.161879 41.861386 41.229616 None Freshwater mussels Anodonta californiensis Margaritifera falcata Gonidea angulata Karuk tribe ISO 19115 Topic Category biota environment inlandWaters None California Klamath River None None. Citations: Krall M. 2010. Freshwater Mussel Abundance and Habitat in the Klamath River of Northern California. B.A.Thesis, Department of Biology, Whitman College, Walla Walla, WA. Tennant C. 2010. A population demographic analysis of Gonidea angulata in the Mid- Klamath Basin. Whitman College, unpublished thesis. Westover ML. 2010. Freshwater mussel distribution, abundance, and habitat preference in the middle Klamath River, Northern California. B.A.Thesis, Department of Biology, Whitman College, Walla Walla, WA. Kari Marie Norgaard, Ph.D. Whitman College 509-527-4951 norgaakm@whitman.edu If Dr. Norgaard can not be contacted as an alternative try: Michael S. Kellett U.S. Forest Service 707-562-8940 mkellett02@fs.fed.us Microsoft Windows Vista Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 9.3.1.4095 Edited original metadata by adding ISO keywords. 20100908 Greg Ewing California Department of Fish and Game bios@dfg.ca.gov Restructured attribute table to show the most pertinent information at the beginning. Also, made other minor edits to the metadata. 20130222 Sophie King California Department of Fish and Wildlife BIOS Data Librarian geodata@wildlife.ca.gov Vector Entity point 40 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 ds661 FID Internal feature number. ESRI Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. SurveyDate Date of survey. G_angulata Number of isolated individual Gonidea angulata observed. M_falcata Number of isolated individual Margaritifera falcata observed. NumBeds Number of mussel beds observed at site. Bed_Length Length of mussel bed observed at site (meters). Bed_Width Width of mussel bed observed at site (meters). AvgQuadrat Mean density of mussels per quadrat. AvgBed Mean density of mussels in bed (mussels/meter2). MusPerBed Extrapolated number of mussels in bed. MusPer50m Estimated number of mussles in 50-meter reach. Quad_Count Number of mussels counted in quadrats. Habitat Habitat unit type (riffle or pool). Site_Num Unique identifier assigned to each site by field crew. UTMe X coordinate (easting) in meters. UTMn Y coordinate (northing) in meters. Downloadable Data 0.001 20131023 Kari Marie Norgaard, Ph.D. Whitman College 509-527-4951 norgaakm@whitman.edu If Dr. Norgaard can not be contacted as an alternative try: Michael S. Kellett U.S. Forest Service 707-562-8940 mkellett02@fs.fed.us FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998 local time http://www.esri.com/metadata/esriprof80.html ESRI Metadata Profile 201310231638030020131023