Dataset: Purple urchin density by depth

Name: Density by depth range of purple sea urchins along the California coast, 37.9 to 39.3 N: Andrew Molean State Park to Manchester State Park from 2005-2014 (CHIPS project)
Published: 2014-11-24
Keywords: biota, oceans

View Data: Data not available yet

Cite This Dataset

Project:

Ecological & genetic recovery from a massive invertebrate die-off along the central coast of California (CHIPS)

Principal Investigator:

Brian Gaylord (University of California-Davis, UC Davis-BML)

Co-Principal Investigator:

Michael N. Dawson (University of California-Merced, UC Merced)

Richard K. Grosberg (University of California-Davis, UC Davis)

Student:

Laura J. Jurgens (University of California-Davis, UC Davis-BML)

Lauren Schiebelhut (University of California-Merced, UC Merced)

Contact:

Laura J. Jurgens (University of California-Davis, UC Davis-BML)

Lauren Schiebelhut (University of California-Merced, UC Merced)

BCO-DMO Data Manager:

Nancy Copley (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

Version:

2014-11-24

Version Date:

2014-11-24

Restricted:

Yes

Validated:

Yes

Current State:

Final no updates expected

Density by depth range of purple sea urchins along the California coast, 37.9 to 39.3 N: Andrew Molean State Park to Manchester State Park from 2005-2014 (CHIPS project)

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Description

This data set includes abundances of Strongylocentrotus purpuratus (purple sea urchin) and their burrows on transects along the California coast from 37.9 N to 39.3 N.

Access Restriction: Access to these data are restricted until publication of the associated manuscript, which is currently in review at PLOS ONE. [2015-02-05]

Methods & Sampling

Subtidal transects for S. purpuratus

SCUBA diver surveys have been conducted, between July and October of each year since 2005, as part of regular monitoring efforts by California Department of Fish and Wildlife. Pairs of divers counted urchins in 30 x 2 m transects in rocky reef habitats in three approximate depth classes at each site (2–10 m, 10–15 m and 15–20 m). Transects were placed at pre-selected random GPS coordinates within each depth stratum, and new random coordinate locations were generated for each survey year. At each site, divers initiated 18 transects in the shallow depth stratum and 9 transects in each of the two deeper strata. Ocean conditions impacted the number of transects completed at each site in any given survey year.

Data Processing Description

BCO-DMO Processing Notes:

added conventional header with dataset name, PI name, version date, reference information
renamed parameters to BCO-DMO standard
added longitude column

More Information about this dataset

Funding Sources

Funding Source	Award Number
California Department of Fish and Wildlife	no_award_num

Deployments

Deployment	Synonyms	Start Date	Platform	Investigator
CalifCoast_Gaylord_CHIPS		2005-01-01	shoreside Calif_shore	Brian Gaylord (Principal Investigator)	data info

Instruments

None available yet

Parameters

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

Supplied Name	Supplied description	Supplied Units	Standard Name
time_period	either before or after the 2011 algal bloom (HAB); range of years given	unitless	time_sample
site	name of site surveyed	unitless	site
lat	latitude; north is positive	decimal degrees	lat
lon	longitude; east is positive	decimal degrees	lon
depth_range	depth range of subtidal transects	meters	depth_range
depth_min	minimum depth of range	meters	depth_min
depth_max	maximum depth of range	meters	depth_max
count	Number of Strongylocentrotus purpuratus counted within depth transect	urchins	count
density	Density of Strongylocentrotus purpuratus within depth transect	number/m^2	density

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Database

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Dataset: Purple urchin density by depth