Dataset: Barnacle percent cover
Deployment: RAPDGALPGS_barnacles_2015-2016

Barnacle percent cover in rocky subtidal habitats

View Data: For data, See Dataset Metadata Page: https://www.bco-dmo.org/dataset/683633

Principal Investigator:

Jon D. Witman (Brown University)

Contact:

Franz Smith (Brown University)

Jon D. Witman (Brown University)

BCO-DMO Data Manager:

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

Project:

RAPID: Understanding Thresholds and regime shifts in marine ecosystems: effects of the 2014-2015 El Nino in the Galapagos rocky subtidal (RAPDGALPGS)

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Description

This dataset contains percent cover of the barnacles (Megabalanus sp.) per 0.25 m2 area photo quadrat at 12 sites (6 m depth) in January 2015 and January 2016 in rocky subtidal habitats of the Galapagos Islands, Ecuador.

Methods & Sampling

Dataset acquisition description

Percent cover data were obtained by the random dot method (200 dots per quadrat, Witman et al. 2010) with 18 replicate quadrats sampled per site. January 2016 data not worked up yet for 2 sites (Pinzon, Roca Cousins). Barnacle percent cover values have an upper bound of 100.

For more information about these sampling methods see:

Witman, J. D., Brandt, M. and Smith, F. (2010), Coupling between subtidal prey and consumers along a mesoscale upwelling gradient in the Galapagos Islands. Ecological Monographs, 80: 153–177. doi:10.1890/08-1922.1

Deployment-specific acquisition description

Subtidal sites were surveyed.

See measurement sites for more details.

Data Processing Description

Dataset Processing Description

Data Processing:
Data are raw percent cover values, with no processing.

BCO-DMO Data Manager Processing Notes:
* added a conventional header with dataset name, PI name, version date
* modified parameter names to conform with BCO-DMO naming conventions
* split yy-MMM column into year (yyyy) and numeric month (MM)
* rounded percent cover to two decimal places
* changed some site names to be consistent with site location list (e.g. Baltra -> North Baltra)
* data were sorted alphabetically by site after naming modifications
* added lat lon from site list

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1450214	NSF Division of Ocean Sciences

Instruments

Camera

Supplied Name:

Supplied Description:

Instrument Type

Generic Name: Camera

Acronym: camera

Community Identifier: http://vocab.nerc.ac.uk/collection/L05/current/311/

Generic Description:

All types of photographic equipment including stills, video, film and digital systems.

Parameters

Supplied Name	Supplied description	Supplied Units	Standard Name
site	Site identifier	unitless	site
lon	Longitude of sampling site	decimal degrees	lon
lat	Latitude of sampling site; west is negative	decimal degrees	lat
year	Year sampling occured	unitless	year
month	Month sampling occurred	unitless	month
depth	Depth sampling occured	unitless	depth
quadrat_num	Replicate quadrat number	unitless	sample_descrip
barnacle_percent_cover	Percent cover of quadrat by barnacles (100% upper bound)	unitless	percent_cover

Database

Contribute Data

Dataset: Barnacle percent cover
Deployment: RAPDGALPGS_barnacles_2015-2016

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Barnacle percent coverDeployment: RAPDGALPGS_barnacles_2015-2016

Dataset acquisition description

Deployment-specific acquisition description

Dataset Processing Description

Dataset: Barnacle percent cover
Deployment: RAPDGALPGS_barnacles_2015-2016