U.S. Forest Service unknown vector digital data Reston, Virginia U.S. Geological Survey https://wildlife.ca.gov/Data/BIOS https://filelib.wildlife.ca.gov/Public/BDB/GIS/BIOS/Public_Datasets/600_699/ds660.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). The occupied freshwater mussel sites documented by Krall (2010), Tennant (2010), and Westover (2010) in Klamath_2007_mussel_locations.shp and Klamath_2010_mussel_locations.shp were projected onto USGS National Hydrography Dataset (NHD) flowlines in ArcMap. NHD flowline reaches immediately adjacent to occupied freshwater mussel sites in Klamath_2007_mussel_locations.shp and Klamath_2010_mussel_locations.shp were selected and exported in shapefile format (Klamath_occupied_mussel_reaches.shp); all the NHD flowline attributes retained. 20070101 20100101 publication date Complete None planned -123.720500 -122.413667 41.932598 41.186711 None Karuk tribe Margaritifera falcata Freshwater mussels Anodonta californiensis Gonidea angulata ISO 19115 Topic Category inlandWaters biota environment None Calfornia Klamath River None Disclaimer: The State makes no claims, promises, or guarantees about the accuracy, completeness, reliability, or adequacy of these data and expressly disclaims liability for errors and omissions in these data. No warranty of any kind, implied, expressed, or statutory, including but not limited to the warranties of non-infringement of third party rights, title, merchantability, fitness for a particular purpose, and freedom from computer virus, is given with respect to these data. Whitman College Kari Marie Norgaard, Ph.D. 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 Citation: - 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. Version 6.2 (Build 9200) ; Esri ArcGIS 10.6.1.9270 Edited original metadata by adding ISO keywords. Reprojected data into California Teale Albers NAD83. 20100908 California Department of Fish and Game Greg Ewing bios@dfg.ca.gov Restructured attribute table to show the most pertinent information at the beginning. Also, made other minor edits to the metadata. 20130926 California Department of Fish and Wildlife Sophie King BIOS Data Librarian geodata@wildlife.ca.gov Vector String 41 NAD 1983 California Teale Albers 34.0 40.5 -120.0 0.0 0.0 -4000000.0 coordinate pair 0.0001 0.0001 meter D North American 1983 GRS 1980 6378137.0 298.257222101 ds660 Occupied Mussel Reaches - Klamath River [ds660] OBJECTID Internal feature number. Esri Sequential unique whole numbers that are automatically generated. Shape Feature geometry. ESRI Coordinates defining the features. FDate The feature date of the original National Hydrography Dataset (NHD) feature. FCode The feature code of the original National Hydrography Dataset (NHD) flowline. FType The feature type of the original National Hydrography Dataset (NHD) flowline (558 = Artificial Path). ComID Unique numeric identification number for the feature as assigned by the Geological Survey (USGS). Note this value cannot be used as the primary key as a single National Hydrography Dataset (NHD) flowline may be divided into several records though interaction with state borders. ReachCode Unique identifier composed of two parts. The first eight digits are the Cataloging Unit Code as defined by FIPS 103. The next six digits are randomly assigned, sequential numbers that are unique within a Catologing Unit. GNIS_ID Identifiers in the Geographic Names Information System. GNIS_Name Names in the Geographic Names Information System. LengthKM Length of features in kilometers. FlowDir Direction of flow is encoded for networked features. Resolution Numeric U.S. Geological Survey (USGS) value indicating the resolution of the feature. 3 medium 2 high 1 local WBAreaComI The waterbody comID of any National Hydrography Dataset (NHD) waterbodies intersecting the original NHD flowline. Enabled No definition for this field is found in "Standards for National Hydrography Dataset - High Resolution" (USGS 1999). Speculative: this field denotes geographic network compatibility of feature (1 = yes)? Shape_Length Length of feature in internal units. Esri Positive real numbers that are automatically generated. See access and use constraints information. ArcGIS Geodatabase 8.3 tar and uncompress 20231201 Whitman College Kari Marie Norgaard, Ph.D. (509) 527-4951 norgaakm@whitman.edu FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 local time