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DWH NRDA Fiddler Crab Burrow Count

Metadata Updated: October 13, 2022

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.

Downloads & Resources

References

https://ecos.fws.gov/ServCat/Reference/Profile/103216

Dates

Metadata Created Date October 13, 2022
Metadata Updated Date October 13, 2022

Metadata Source

Harvested from DOI DCAT-US harvest source

Additional Metadata

Resource Type Dataset
Metadata Created Date October 13, 2022
Metadata Updated Date October 13, 2022
Publisher Fish and Wildlife Service
Maintainer
Identifier FWS_ServCat_103216
Data First Published 2010-07-20
Data Last Modified 2010-07-20
Category Generic Dataset
Public Access Level public
Bureau Code 010:18
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Data Quality True
Harvest Object Id 33ff620e-2f10-4ac0-af6a-25509238de62
Harvest Source Id bee011ae-6f4a-4b9b-bef9-6c8b6453c562
Harvest Source Title DOI DCAT-US harvest source
Homepage URL https://ecos.fws.gov/ServCat/Reference/Profile/103216
Program Code 010:094, 010:028
Related Documents https://ecos.fws.gov/ServCat/Reference/Profile/103216
Source Datajson Identifier True
Source Hash 66936e43100ca4f81d57d1c966ba58495cff110b
Source Schema Version 1.1
Temporal 2010-06-10/2010-07-20

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