Dataset: Barnacle cover
Deployment: RAPDGALPGS_sites

Central Galapagos subtidal temperatures

Principal Investigator:

Contact:

BCO-DMO Data Manager:

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

Project:

RAPID: Testing the ability of the 2015-2017 El Nino Southern Oscillation (ENSO) to drive a community-level regime shift in the Galapagos marine ecosystem (SPONGERAPDGALPGS)

Data URL:

https://www.bco-dmo.org/dataset-deployment/732657/data

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Description

This dataset contains barnacle (Megabalanus peninsularis) cover in the central Galápagos Islands, Ecuador from Jan 2016 to Jan 2017.

Methods & Sampling

Dataset acquisition description

The proportion of barnacle cover is derived from 0.25 m2 photoquadrats using point-intersect methodology.

Photoquadrat methodology is described in Witman (1985) was adapted for a digital photographic system using a Sony alpha7 24 Megapixel camera in a Nauticam Underwater housing with the Nikkor 15 mm underwater lens. Images were analyzed by overlaying a random grid of points over the digital photoquadrat image, recording the proportion of points occupied by Megabalanus peninsularis.

Data Processing Description

Dataset Processing Description

Data are raw, 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
* "NA" values replaced with no data value 'nd' for "no data"
* site positions added from dataset: https://www.bco-dmo.org/dataset/628159
* site names modified to match site list format and other datasets in this project:
Daphne -> Daphne Menor
Roca Cousins -> Cousins
Baltra -> North Baltra
Gardner -> Islote Gardner

More information about this dataset deployment

Funding

Award Number	Funding Source
OCE-1623867	NSF Division of Ocean Sciences

Instruments

Camera

Supplied Name: Sony alpha7

Supplied Description:

Sony alpha7 24 Megapixel camera in a Nauticam Underwater housing with the Nikkor 15 mm underwater lens

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 name	unitless	site
Lat	Latitude of site	decimal degrees	lat
Lon	Longitude of site	decimal degrees	lon
Date	Date of sampling (UTC-6) in format yyyy-mm-dd	unitless	site
Quadrat_Number	Replicate number of 0.25 m^2 photographic quadrat	unitless	sample_descrip
proportion_barnacles	Proportion of quadrat occupied by Megabalanus barnacles derived from point-intersect methodology	dimensionless	no_bcodmo_term

Database

Contribute Data

Dataset: Barnacle cover
Deployment: RAPDGALPGS_sites

Dataset acquisition description

Dataset Processing Description

Database

Contribute Data

Dataset: Barnacle coverDeployment: RAPDGALPGS_sites

Dataset acquisition description

Dataset Processing Description

Dataset: Barnacle cover
Deployment: RAPDGALPGS_sites