Filters: Tags: Ground truthing (X)
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A buffer zone of 30.5 m is commonly used to protect species in riparian and wetland systems. This 30.5 m standard was developed to protect water quality, not biodiversity, and few studies have tested its effectiveness for protecting riparian and wetland species. We tested the standard implementation of 30.5 m buffers to determine if they protect critical habitat for semi-aquatic vertebrate species, using the boreal toad (Bufo boreas) as an example. Using radio telemetry of 84 toads in south-central Utah in 2003 and 2004, we found that the standard implementation of 30.5 m buffers did not protect all critical habitats for boreal toads. Managers should consider the following factors when establishing buffer zones:...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Biological Conservation,
Bufo boreas,
Conservation buffer,
Fixed width buffer,
Ground truthing,
These data map in high detail surficial cross-sections of North Core Banks, a barrier island in Cape Lookout National Seashore, NC, in October 2022. U.S. Geological Survey field efforts are part of an interagency agreement with the National Park Service to monitor the recovery of the island from Hurricanes Florence (2018) and Dorian (2019). Three sites of outwash, overwash, and pond formation were targeted for extensive vegetation ground-truthing, sediment samples, bathymetric mapping with a remote-controlled surface vehicle, and uncrewed aerial systems (UAS) flights to collect multispectral imagery. Five semi-permanent ground control points were also installed and surveyed to act as control for additional aerial...
Categories: Data;
Tags: Atlantic Ocean,
Bathymetry and Elevation,
CMHRP,
Cape Lookout,
Coastal and Marine Hazards and Resources Program,
These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Delineated irrigated acreage in 2005 was field verified from September 26 to 29 and November 1 to 3 , 2005. Fields were visited to confirm that irrigation had occurred in remotely delineated polygons. The irrigation method, crop type, and water source for each field also was inventoried. The location of each delineated field was checked using a handheld GPS. Digital photographs were taken of each field and the bearing and time of...
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