biosds2833_cpu (Map Service)
View In:
ArcGIS JavaScript
ArcGIS.com
WMTS
Current Version: 10.81
Service Description: Visual Encounter Transect Surveys of reptiles, birds, and other vertebrate wildlife taxa were conducted at study sites in the Great Valley and Mojave Desert in 2016. A total of 1,856 transect surveys (GV: 517, MD: 1339) at 321 study sites (GV: 91, MD: 230) were conducted between March and July 2016. For each survey, observers walked two 200-meter transects and recorded counts of and distances to all wildlife observed. The two transects are laid out as a cross intersecting at a right angle, with this intersection occurring at survey site center. The exact orientation of the cross and the sinuosity of transects was left to the discretion of the surveyor(s) to optimize sampling of the site-designated lifeform and to facilitate ease of travel (e.g., barriers or steep slopes). In the case of a riparian lifeform site, one transect was aligned along or near the stream course, and the second along the gradient extending to either side of the stream course. In the case of a guzzler or wetland, transects were aligned along approximately perpendicular sides. A laser rangefinder was used to accurately measure the perpendicular distance from the transect to the location of each wildlife group at the instance of its initial observation. The crew also noted all wildlife signs (tracks, scat, burrows, nests) observed; in particular, every scat group within a 1-m swath on either side of the transect wasnoted and identified by species whenever possible. All scats and tracks were removed from the swath so that return visits encountered fresh sign.Individual surveys focused on either reptiles and amphibians, or on birds and scat, but observations from all surveys were combined into this dataset. These data were used for distance sampling methods to estimate abundance.
Map Name: Layers
Legend
All Layers and Tables
Layers:
Description: Visual Encounter Transect Surveys of reptiles, birds, and other vertebrate wildlife taxa were conducted at study sites in the Great Valley and Mojave Desert in 2016. A total of 1,856 transect surveys (GV: 517, MD: 1339) at 321 study sites (GV: 91, MD: 230) were conducted between March and July 2016. For each survey, observers walked two 200-meter transects and recorded counts of and distances to all wildlife observed. The two transects are laid out as a cross intersecting at a right angle, with this intersection occurring at survey site center. The exact orientation of the cross and the sinuosity of transects was left to the discretion of the surveyor(s) to optimize sampling of the site-designated lifeform and to facilitate ease of travel (e.g., barriers or steep slopes). In the case of a riparian lifeform site, one transect was aligned along or near the stream course, and the second along the gradient extending to either side of the stream course. In the case of a guzzler or wetland, transects were aligned along approximately perpendicular sides. A laser rangefinder was used to accurately measure the perpendicular distance from the transect to the location of each wildlife group at the instance of its initial observation. The crew also noted all wildlife signs (tracks, scat, burrows, nests) observed; in particular, every scat group within a 1-m swath on either side of the transect wasnoted and identified by species whenever possible. All scats and tracks were removed from the swath so that return visits encountered fresh sign.Individual surveys focused on either reptiles and amphibians, or on birds and scat, but observations from all surveys were combined into this dataset. These data were used for distance sampling methods to estimate abundance.
Copyright Text:
Spatial Reference:
102100
Single Fused Map Cache: true
Capabilities: Map,TilesOnly,Tilemap
Tile Info:
- Height: 256
- Width: 256
- DPI: 96
- Levels of Detail: (# Levels: 24)
- Level ID: 0 [Start Tile, End Tile]
Resolution: 156543.033928
Scale: 5.91657527591555E8
- Level ID: 1 [Start Tile, End Tile]
Resolution: 78271.5169639999
Scale: 2.95828763795777E8
- Level ID: 2 [Start Tile, End Tile]
Resolution: 39135.7584820001
Scale: 1.47914381897889E8
- Level ID: 3 [Start Tile, End Tile]
Resolution: 19567.8792409999
Scale: 7.3957190948944E7
- Level ID: 4 [Start Tile, End Tile]
Resolution: 9783.93962049996
Scale: 3.6978595474472E7
- Level ID: 5 [Start Tile, End Tile]
Resolution: 4891.96981024998
Scale: 1.8489297737236E7
- Level ID: 6 [Start Tile, End Tile]
Resolution: 2445.98490512499
Scale: 9244648.868618
- Level ID: 7 [Start Tile, End Tile]
Resolution: 1222.99245256249
Scale: 4622324.434309
- Level ID: 8 [Start Tile, End Tile]
Resolution: 611.49622628138
Scale: 2311162.217155
- Level ID: 9 [Start Tile, End Tile]
Resolution: 305.748113140558
Scale: 1155581.108577
- Level ID: 10 [Start Tile, End Tile]
Resolution: 152.874056570411
Scale: 577790.554289
- Level ID: 11 [Start Tile, End Tile]
Resolution: 76.4370282850732
Scale: 288895.277144
- Level ID: 12 [Start Tile, End Tile]
Resolution: 38.2185141425366
Scale: 144447.638572
- Level ID: 13 [Start Tile, End Tile]
Resolution: 19.1092570712683
Scale: 72223.819286
- Level ID: 14 [Start Tile, End Tile]
Resolution: 9.55462853563415
Scale: 36111.909643
- Level ID: 15 [Start Tile, End Tile]
Resolution: 4.77731426794937
Scale: 18055.954822
- Level ID: 16 [Start Tile, End Tile]
Resolution: 2.38865713397468
Scale: 9027.977411
- Level ID: 17 [Start Tile, End Tile]
Resolution: 1.19432856685505
Scale: 4513.988705
- Level ID: 18 [Start Tile, End Tile]
Resolution: 0.597164283559817
Scale: 2256.994353
- Level ID: 19 [Start Tile, End Tile]
Resolution: 0.298582141647617
Scale: 1128.497176
- Level ID: 20 [Start Tile, End Tile]
Resolution: 0.14929107082380833
Scale: 564.248588
- Level ID: 21 [Start Tile, End Tile]
Resolution: 0.07464553541190416
Scale: 282.124294
- Level ID: 22 [Start Tile, End Tile]
Resolution: 0.03732276770595208
Scale: 141.062147
- Level ID: 23 [Start Tile, End Tile]
Resolution: 0.01866138385297604
Scale: 70.5310735
- Format: PNG
- Compression Quality: 0
- Origin:
X: -2.0037508342787E7
Y: 2.0037508342787E7
- Spatial Reference:
102100
Initial Extent:
XMin: -1.3586265344999999E7
YMin: 4018243.527800001
XMax: -1.27236731387E7
YMax: 4811885.5252
Spatial Reference:
102100
Full Extent:
XMin: -1.3586265344999999E7
YMin: 4018243.527800001
XMax: -1.27236731387E7
YMax: 4811885.5252
Spatial Reference:
102100
Min Scale: 5.91657528E8
Max Scale: 1128.0
Min LOD: 0
Max LOD: 14
Units: esriMeters
Supported Image Format Types: PNG
Export Tiles Allowed: false
Max Export Tiles Count: 100000
Resampling: true
Document Info:
- Title: Transect Survey - 2016 - Terrestrial Species Stressor Monitoring [ds2833]
- Author: BIOS_Admin
- Comments:
- Subject: In response to a drought State of Emergency declared by the Governor in January 2014 and subsequent executive orders, the California Department of Fish and Wildlife (CDFW) was charged to implement projects that respond to drought conditions through habitat restoration and other measures. To provide scientific information necessary to meet these conservation challenges, leadership at CDFW prioritized establishment of a statewide resource assessment program, one component of which would be to monitor wildlife populations and their vulnerability to drought stressors. The purpose of Terrestrial Species Stressor Monitoring (TSM) was to begin the monitoring process by collecting baseline survey data on a wide variety of common wildlife species throughout the Great Valley and Mojave Desert ecoregions. Data collected at some or all study sites include infrared camera trap images, ultrasonic acoustic recordings, audible acoustic recordings, visual encounter surveys for reptiles and amphibians, avian point counts, and vegetation surveys. The data will be used to estimate occupancy and abundance of wildlife species and to model associations with drought and other habitat conditions.
- Category:
- Keywords: Auth_CDFW, California Department of Fish And Wildlife, California Natural Resources Agency, TSM, Terrestrial Species Stressor Monitoring, drought, central valley, Great Valley, Mojave Desert, environment, California, biodiversity, bird, bat, reptile, amphibian, vegetation, transects, DS2833_20190626_wm