Dataset: Density of sea fans

Name: Density of sea fans from surveys in St. John, US Virgin Islands in August of 2020
Published: 2022-02-11
Keywords: oceans

Cite This Dataset

DOI:10.26008/1912/bco-dmo.869648.1

Spatial Extent: N:18.316899 E:-64.725955 S:18.315582 W:-64.731651

Temporal Extent: 2020-08-09 - 2020-08-13

Project:

RUI: Pattern and process in four decades of change on Caribbean reefs (St John Coral Reefs)

Principal Investigator:

Peter J. Edmunds (California State University Northridge, CSUN)

Co-Principal Investigator:

Darren J Brown (Pennsylvania State University, PSU)

BCO-DMO Data Manager:

Amber D. York (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

Version Date:

2022-02-11

Restricted:

Validated:

Yes

Current State:

Final no updates expected

Density of sea fans from surveys in St. John, US Virgin Islands in August of 2020

Abstract:

Data describe the density of Gorgonia ventalina recorded in August 2020 in 1 x 1 m quadrats in St. John, US Virgin Islands. These data support the publication Edmunds & Brown (2021) in the Bulletin of Marine Science doi.org/10.5343/bms.2020.0061.

Expand/Collapse All

Archival Copy

Version Date	Archive	Persistent Identifier	Date Assigned
2022-02-11	Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)	10.26008/1912/bco-dmo.869648.1	2022-02-14

Methods & Sampling

Analyses were completed on snorkel during August 2020. A 40 m transect was haphazardly placed along the 2-2.5 m depth contour at each site, and quadrats (1 x 1m) were randomly placed along the transect. Colonies of Gorgonia ventalina were counted in each quadrat when their holdfasts were within the sampling area. Colonies were distinguished between the yellow and purple morph.

Location: St. John, US Virgin Islands 18.315°N, 64.716°W
White Point = site on the south shore of St. John 18.316899N, -64.731651W
Yawzi Point = site on the south shore of St. John 18.315582N, -64.725955W

Data Processing Description

Systat 13.0 software

BCO-DMO Data Manager Processing Notes:
* Parameters (column names) renamed to comply with BCO-DMO naming conventions. See https://www.bco-dmo.org/page/bco-dmo-data-processing-conventions
* Date format converted to ISO 8601 date format yyyy-mm-dd from Survey Date column which contained month and day, and the metadata which said the year was 2020.
* Lat and Lon columns added for sites from positions in the metadata.
* Lat and Lon rounded to 5 decimal places
* Checked species name "Gorgonia ventalina" in the World Register of Marine Species (WoRMS) on 2022-02-11. It was an exact match to LSID: urn:lsid:marinespecies.org:taxname:290045

Data Files

File
seafan_density.csv (Comma Separated Values (.csv), 3.38 KB) MD5:6e818319d55ec10502cdfc94eed347c1 Primary data file for dataset ID 869648

More Information about this dataset

Funding Sources

Funding Source	Award Number
NSF Division of Ocean Sciences	OCE-2019992

Deployments

None available yet

Instruments

None available yet

Parameters

Date and time formats are described in python strftime() syntax.

Supplied Name	Supplied description	Supplied Units	Standard Name
Site	Site name (Yawzi Point or White Point).	unitless	site
Depth	Survey depth	meters (m)	depth
Survey_Date	Survey Date. Date that work was completed in ISO 8601 format YYYY-MM-DD Format: %Y-%m-%d	unitless	date
Quadrat_Num	Number of quadrat that was counted	unitless	site_descrip
Color_morph	Fan color (purple or yellow)	unitless	brief_desc
Density	Number of fans with their holdfasts in each quadrat	number per square meter (#/m2)	density
Lat	Site latitude	decimal degrees	lat
Lon	Site longitude	decimal degrees	lon

Status message

Database

Contribute Data

Dataset: Density of sea fans