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DWH NRDA Fiddler Crab Burrow Count

Metadata Updated: October 29, 2023

There were multiple objectives for data collection as part of the Secretive Marsh Bird assessments. This dataset pertains to Objective 4, referred to in the study workplan as Methodology D, which consists of systematic checks of fiddler crab burrow density to reveal information about secretive marsh bird densities, and specifically the density of the clapper rail. Clapper rail diets depend heavily on fiddler crabs in the northern Gulf Coast ecosystem and consequently clapper rail densities are directly correlated with fiddler crab densities. These relationships make quantifying fiddler crab burrow density before and after an oil-spill valuable to understanding the potential impact of the oil spill on clapper rails and other marsh birds. Transects are oriented perpendicular to the marsh water edge and consist of 12 sample locations of 0.25 m2. The sample locations are along the transect at 1) the intertidal region (i.e., 0 meters from the shore), 2) five meters from shore, 3) 15 meters form shore, and 4) 30 meters from shore (i.e., the interior marsh). At each site, surveyors counted the number of fiddler crab burrows and then took note of GPS coordinates of transects for future (post impact) sampling efforts. These data were collected pre-spill (i.e., before oil from the spill reached the shoreline), and transects were marked with PVC pipes and locations recorded via GPS unit so that data could be collected again post-spill. However, by the time the study was implemented in the field, many of the study sites had been impacted by oil in some manner.

Access & Use Information

Public: This dataset is intended for public access and use. License: No license information was provided. If this work was prepared by an officer or employee of the United States government as part of that person's official duties it is considered a U.S. Government Work.

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Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023

Metadata Source

Harvested from DOI EDI

Additional Metadata

Resource Type Dataset
Metadata Created Date June 1, 2023
Metadata Updated Date October 29, 2023
Publisher U.S. Fish and Wildlife Service
Identifier FWS_ServCat_103216
Data First Published 2010-07-20T12:00:00Z
Data Last Modified 2010-07-20
Category Generic Dataset
Public Access Level public
Bureau Code 010:18
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Data Quality True
Harvest Object Id b0dcf7fe-a7c3-44a9-8e9b-502854af8282
Harvest Source Id 52bfcc16-6e15-478f-809a-b1bc76f1aeda
Harvest Source Title DOI EDI
Homepage URL
Program Code 010:028, 010:094
Publisher Hierarchy White House > U.S. Department of the Interior > U.S. Fish and Wildlife Service
Related Documents
Source Datajson Identifier True
Source Hash 6e65a3fcc3cfbfc523ccb642a7ee825b68f1d1219894922b9083fc30f4ce353b
Source Schema Version 1.1
Temporal 2010-06-10T12:00:00Z/2010-07-20T12:00:00Z

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