SDE Feature Class
Tags
California, Chocolate Mountain Aerial Gunnery Range, Fremont-Kramer, Arizona, Joshua Tree National Park, Mormon Mesa, Ivanpah, Fenner, Chuckwalla, Desert Wildlife Management Area, Chemehuevi, Gopherus agassizii, critical habitat, Piute Valley, Mojave desert tortoise, Mojave Desert, Eldorado Valley, Colorado Desert, Coyote Springs Valley, Nevada, Western Mojave Recovery Unit, Gold Butte-Pakoon, Pinto Mountains, USFWS, Northeastern Mojave Recovery Unit, Superior-Cronese, distance sampling, Eastern Mojave Recovery Unit, Utah, transect, monitoring, U.S. Fish and Wildlife Service, Beaver Dam Slope, Colorado Desert Recovery Unit, Ord-Rodman
These data were collected under protocols to optimize estimation of tortoise densities in each recovery unit. These data are also suitable for use by scientific and resource management communities for ongoing desert tortoise research, modeling, monitoring, mapping, and visualization applications.
Line distance sampling is the current method for estimating regional densities of Mojave desert tortoises under range-wide monitoring called for in the federal recovery plan (U.S. Fish and Wildlife Service [USFWS]. 2011. Revised recovery plan for the Mojave population of the desert tortoise (Gopherus agassizii). USFWS, Pacific Southwest Region, Sacramento, California. 222 pp.). Line distance sampling efforts result in a variety of related data: strata boundaries, transects, transect observations or live tortoises and of remains. Strata boundaries represent the areas available to be sampled and were developed by the Mojave Desert Ecosystem Program (MDEP) primarily from critical habitat for the desert tortoise as defined by the USFWS Federal Register Notice (59 FR 5820), dated February 8, 1994. Transects are the actual transects that were sampled by field crews. Transect paths were reconstructed based on coordinate points collected along the transects at approximately 500 m intervals. Distance survey live/remains observations represent observations made by field crews while walking transects using distance sampling search techniques. Opportunistic live/remains observations represent observations made by these crews when they were not actively using distance sampling search techniques.
U.S. Fish and Wildlife Service (USFWS), TopoWorks, Mojave Desert Ecosystem Program (MDEP), Kiva Biological Consulting, Great Basin Institute, Institute for Wildlife Studies, Chambers, Utah Division of Wildlife Resources, Mojave National Preserve
The Fish and Wildlife Service shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics (e.g., GIF or JPG format files) are not legal documents and are not intended to be used as such. The information contained in these data may be dynamic and could change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data; it is not appropriate to use the related graphics as data. The Fish and Wildlife Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data be directly acquired from an authorized Fish and Wildlife Service source and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on computer systems at the Fish and Wildlife Service or through cooperators/contractors, no warranty expressed or implied is made regarding the utility of the data on other systems for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.
Extent
| West | -118.044253 | East | -113.744933 |
| North | 37.334339 | South | 32.932974 |
| Maximum (zoomed in) | 1:5,000 |
| Minimum (zoomed out) | 1:150,000,000 |
The Fish and Wildlife Service shall not be held liable for improper or incorrect use of the data described and/or contained herein. These data and related graphics (e.g., GIF or JPG format files) are not legal documents and are not intended to be used as such. The information contained in these data may be dynamic and could change over time. The data are not better than the original sources from which they were derived. It is the responsibility of the data user to use the data appropriately and consistent within the limitations of geospatial data in general and these data in particular. The related graphics are intended to aid the data user in acquiring relevant data; it is not appropriate to use the related graphics as data. The Fish and Wildlife Service gives no warranty, expressed or implied, as to the accuracy, reliability, or completeness of these data. It is strongly recommended that these data be directly acquired from an authorized Fish and Wildlife Service source and not indirectly through other sources which may have changed the data in some way. Although these data have been processed successfully on computer systems at the Fish and Wildlife Service or through cooperators/contractors, no warranty expressed or implied is made regarding the utility of the data on other systems for general or scientific purposes, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data.