SDE Feature Class
Tags
California, Fish, alpine, montane, mountain, Survey, environment, alpine, lake, lentic, biota, Sierra Nevada, frog, aquatic
Projects are targeted at removing non-native trout species in order to maintain and/or improve habitat for mountain yellow-legged frog populations. The purpose of the lentic water body data is to capture spatial water features occurring on the Sierra Nevada landscape for reference to biological surveys. KNOWN CAVEATS OF THE RESTORATION DATA: 1) Daily counts of fish removed at a site were done in the field, however, it is certain that some fish were not counted. This is either human error or due to fish falling out of gill nets prior to being counted by DFW crews. KNOWN CAVEATS OF THE LENTIC WATER BODY DATA: 1) Lakes were digitized manually and may have small errors in their location. 2) Over 11% of surveyed lentic waterbodies were discovered by crews while in the field. Although only a small minority of waterbodies in this shapefile have not been surveyed, it is surely an underestimate of total lentic waterbodies in the state.
This data provides an overview of native amphibian restoration sites in the Sierra Nevada. Following High Mountain Lakes surveys, fish were manually removed at some high elevation lake sites. Removals of non-native trout were done at sites with mountain yellow-legged frogs or with frogs nearby. Fish removal is done without the use of chemicals, using monofilament gill nets and electrofishing. Gill nets catch adult and juvenile fish. Electrofishing is used primarily as a way to remove fish from small tributary streams and fry (less than 70mm) from shallow areas. Current literature has shown that mountain yellow-legged frog populations can rebound quickly after trout removal. Frog population counts at CDFW sites support this finding. The restoration data, along with the related high mountain lakes amphibian, fish and fisheries project data sets represent biological surveys conducted at a series of lakes in the Sierra Nevada ranging from Plumas County in the north to Tulare County in the south. During High Mountain Lake (HML) surveys, Sierra Nevada lentic waters were surveyed for fish, frogs, habitats, stream barriers to fish movement and presence of fairy shrimp. Lakes with fish were surveyed using monofilament gill nets. Amphibians were detected and documented based on direct observation. Contact Sarah Mussulman (916) 358-2838 for additional survey protocol detail and a description of methods. As part of the development of the biological data sets, researchers created a detailed coverage of lakes for (ostensibly) all known lentic water bodies in California above 5000 elevation. Lake features were digitized from USGS 1:24000 quadrangles and assigned a unique identifying number. High Mountain Lakes (HML) surveys were performed in the Sierra Nevada starting in 2001 and use these unique ID numbers to reference waterbodies. WHAT EACH RECORD REPRESENTS: Each record represents a lake where CDFW has begun removing fish to benefit a population of mountain yellow-legged frogs. The majority of lakes in this dataset are currently fishless; a handful are active fish removal sites.
California Department of Fish and Wildlife (CDFW)
License: This work is licensed under Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ ). Using the citation standards recommended for BIOS datasets ( https://www.wildlife.ca.gov/Data/BIOS/Citing-BIOS ) satisfies the attribution requirements of this license.
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.
To use data outside BIOS, please contact developer. If data are used, please acknowledge that the dataset was created and provided by the California Department of Fish and Wildlife.
Extent
| West | -121.136729 | East | -117.730971 |
| North | 39.980622 | South | 34.358125 |
| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:150,000,000 |
License: This work is licensed under Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ ). Using the citation standards recommended for BIOS datasets ( https://www.wildlife.ca.gov/Data/BIOS/Citing-BIOS ) satisfies the attribution requirements of this license.
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.
To use data outside BIOS, please contact developer. If data are used, please acknowledge that the dataset was created and provided by the California Department of Fish and Wildlife.