http://lod.bco-dmo.org/id/dataset/541003
eng; USA
utf8
dataset
Highest level of data collection, from a common set of sensors or instrumentation, usually within the same research project
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
2014-11-26
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Density of purple sea urchins along the California coast, 37.8 to 39.3 N: Andrew Molean State Park to Manchester State Park from 2005-2014 (CHIPS project)
2014-12-20
publication
2014-12-20
revision
BCO-DMO Linked Data URI
2014-12-20
creation
http://lod.bco-dmo.org/id/dataset/541003
Brian Gaylord
University of California - Davis: Bodega Marine Laboratory
principalInvestigator
Michael N. Dawson
University of California-Merced
principalInvestigator
Richard K. Grosberg
University of California-Davis
principalInvestigator
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
publisher
Cite this dataset as: Gaylord, B., Dawson, M. N., Grosberg, R. K. (2014) Density of purple sea urchins along the California coast, 37.8 to 39.3 N: Andrew Molean State Park to Manchester State Park from 2005-2014 (CHIPS project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2014-12-20) Version Date 2014-12-20 [if applicable, indicate subset used]. http://lod.bco-dmo.org/id/dataset/541003 [access date]
Density of purple sea urchins along the California coast, 37.8 to 39.3 N Dataset Description: <p>Twenty accessible rocky intertidal sites were selected to span the ‘kill-zone’ and peripheral locations (see list of sites in Jurgens et al. submitted). Two rocky intertidal areas were sampled per site, usually one on either side of the point of entry onto the beach and separated by approximately 100 m. We used quadrats (1m^2 [4 * 0.25 m^2] or 0.0625 m^2) and swaths (2 m wide transects) to estimate juvenile and adult abundance for each target species.</p>
<p>This data set includes abundances of <em>Strongylocentrotus purpuratus</em> (purple sea urchin) and their burrows on transects along the California coast from 37.9 N to 39.3 N.</p>
<p><strong>Access Restriction</strong>: Access to these data are restricted until publication of the associated manuscript, which is currently in review at PLOS ONE. [2015-02-05]</p>
<p><strong>Related Datasets:</strong><br />
<a href="http://www.bco-dmo.org/dataset/528964">Henricia counts</a><br />
<a href="http://www.bco-dmo.org/dataset/541036">Purple urchin density by depth</a><br />
<a href="http://www.bco-dmo.org/dataset/528940">Seastar and chiton counts - quadrats and swaths</a><br />
<a href="http://www.bco-dmo.org/dataset/562467" target="_blank">CHIPS02 - seastar chiton urchin counts in quadrats</a></p> Methods and Sampling: <p>Surveys of <em>S. purpuratus</em> occupancy</p>
<p>We quantified occupied and unoccupied burrows in intertidal bedrock; these burrows are directly attributable to <em>S. purpuratus</em>. The rock walls of burrows are clean while urchins occupy them, but sessile invertebrates such as barnacles, spirorbid worms and anemones rapidly (within weeks) colonize vacated burrows. We used this distinctive indicator to estimate pre-HAB urchin populations, calculating pre-HAB density as the combined density of live urchins plus clean, empty burrows. We calibrated this quantity using the average occupancy rate of burrows at four control sites (Van Damme State Park, Arena Cove, Palomarin, Duxbury Reef). We began mortality surveys at three sites (Phillips Gulch, Windermere Point, Bodega Marine Reserve) within two weeks of initial observations of an harmful algal bloom (HAB), once tides became low enough to access urchin habitat. We completed initial population surveys at the remaining sites during the first three accessible low tide series following the HAB, between October and December 2011.</p>
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1243970 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1243970
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1243958 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1243958
completed
Brian Gaylord
University of California - Davis: Bodega Marine Laboratory
707-875-1940
Bodega Marine Laboratory & Department of Evolution and Ecology 2099 Westshore Road, P.O. Box 247
Bodega Bay
CA
94923
USA
bpgaylord@ucdavis.edu
pointOfContact
Michael N. Dawson
University of California-Merced
209-228-4056
School of Natural Sciences 5200 North Lake Road
Merced
CA
95343
United States
mdawson@ucmerced.edu
pointOfContact
Richard K. Grosberg
University of California-Davis
Department of Ecology and Evolution 1 Shields Ave
Davis
CA
95616
USA
rkgrosberg@ucdavis.edu
pointOfContact
asNeeded
Dataset Version: 2014-12-20
Unknown
site
lat
lon
date_survey
quad_num
quad_area
live_per_quad
live_per_m2
empty_per_quad
empty_per_m2
prior_density_m2
impact_flag
theme
None, User defined
site
latitude
longitude
date
sample identification
No BCO-DMO term
count
abundance
flag
featureType
BCO-DMO Standard Parameters
CalifCoast_Gaylord_CHIPS
service
Deployment Activity
North-central, CA: Andrew Molean State Park to Manchester State Park
place
Locations
otherRestrictions
otherRestrictions
Access Constraints: none. Use Constraints: Please follow guidelines at: http://www.bco-dmo.org/terms-use Distribution liability: Under no circumstances shall BCO-DMO be liable for any direct, incidental, special, consequential, indirect, or punitive damages that result from the use of, or the inability to use, the materials in this data submission. If you are dissatisfied with any materials in this data submission your sole and exclusive remedy is to discontinue use.
Ecological & genetic recovery from a massive invertebrate die-off along the central coast of California
https://osprey.bco-dmo.org/project/521152
Ecological & genetic recovery from a massive invertebrate die-off along the central coast of California
<p>This project is a Collaborative Research project funded by an NSF RAPID grant.</p>
<p><em>Description from NSF award abstract:</em><br />
The potentially important role that larval dispersal may play in determining gene flow, distributions, and population structure of marine invertebrates remains unclear despite many hundreds of descriptive comparisons of pelagic duration and population genetic structure. This lack of clarity suggests many factors may influence population genetic structure and their interactions may be complex. Difficulties studying these factors include (under normal circumstances) distinguishing local from exogenous recruitment and therefore the true distribution of dispersal distances. For example, experiments that normally could be undertaken to explore this issue are very small scale relative to the distances that many marine taxa may disperse.</p>
<p>In August 2011, a large-scale natural removal experiment was initiated along a 100 km stretch of the central California coast. The PIs propose to use this rare opportunity to clarify the effects of dispersal and species interactions on marine population genetic variation and community structure. They propose to study three species that suffered very high rates of mortality: an ecosystem engineer (<em>Strongylocentrotus purpuratus</em>, ~100% mortality), a keystone species (<em>Pisaster ochraceus</em>, ~10-70% mortality), and one of its competitors (<em>Leptasterias sp.</em>, ~100% mortality). Their objectives during this first year following the natural large-scale die-off are to:</p>
<p>(1) quantify the abundance and distribution of the target species at sites across the impacted range and reference sites to the south and north,<br />
(2) develop and use genetic markers to identify the sources and dispersal distances of new recruits of <em>P. ochraceus</em>, <em>Leptasterias sp.</em>, and <em>S. purpuratus</em> that recolonize the impacted range, and<br />
(3) describe changes in abundance of these three species and their prey and competitors at sites throughout the impacted range.</p>
CHIPS
largerWorkCitation
project
eng; USA
biota
oceans
North-central, CA: Andrew Molean State Park to Manchester State Park
2014-12-20
Northeastern Pacific (northern California) 38-39 N
0
BCO-DMO catalogue of parameters from Density of purple sea urchins along the California coast, 37.8 to 39.3 N: Andrew Molean State Park to Manchester State Park from 2005-2014 (CHIPS project)
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
http://lod.bco-dmo.org/id/dataset-parameter/541023.rdf
Name: site
Units: unitless
Description: <p>name of location surveyed</p>
http://lod.bco-dmo.org/id/dataset-parameter/541024.rdf
Name: lat
Units: decimal degrees
Description: <p>latitude of survey site; north is positive</p>
http://lod.bco-dmo.org/id/dataset-parameter/541025.rdf
Name: lon
Units: decimal degrees
Description: <p>longitude; east is positive</p>
http://lod.bco-dmo.org/id/dataset-parameter/541026.rdf
Name: date_survey
Units: yyyy-mm-dd
Description: <p>first date quadrat-based quantitative surveys were conducted; i.e. date the data here were collected</p>
http://lod.bco-dmo.org/id/dataset-parameter/541027.rdf
Name: quad_num
Units: unitless
Description: <p>number of the quadrat in which counts of live urchins and empty burrows were conducted; total of 12</p>
http://lod.bco-dmo.org/id/dataset-parameter/541028.rdf
Name: quad_area
Units: meter^2
Description: <p>area of the quadrat in which counts were conducted. Quadrats were 50cm per square side.</p>
http://lod.bco-dmo.org/id/dataset-parameter/541029.rdf
Name: live_per_quad
Units: # urchins
Description: <p>number of live Strongylocentrotus purpuratus per quadrat</p>
http://lod.bco-dmo.org/id/dataset-parameter/541030.rdf
Name: live_per_m2
Units: # urchins/meter^2
Description: <p>number of live urchins per quadrat scaled by area of quadrat to a count per square meter</p>
http://lod.bco-dmo.org/id/dataset-parameter/541031.rdf
Name: empty_per_quad
Units: # burrows
Description: <p>number of clean unfouled & empty S. purpuratus burrows in each quadrat</p>
http://lod.bco-dmo.org/id/dataset-parameter/541032.rdf
Name: empty_per_m2
Units: # burrows/meter^2
Description: <p>number of empty burrows per quadrat scaled by area of quadrat to a count per meter square</p>
http://lod.bco-dmo.org/id/dataset-parameter/541033.rdf
Name: prior_density_m2
Units: # urchins/meter^2
Description: <p>prior density estimated using clean empty burrows per square meter plus live urchins per square meter</p>
http://lod.bco-dmo.org/id/dataset-parameter/541034.rdf
Name: impact_flag
Units: unitless
Description: <p>Yes=recent loss of urchins detected; No= no evidence of recent urchin loss in the populations; in each case this assessment was based on the presence of clean empty urchin burrows versus live animals</p>
GB/NERC/BODC > British Oceanographic Data Centre, Natural Environment Research Council, United Kingdom
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
9335
https://datadocs.bco-dmo.org/file/R88XyZghG21D0N/urchin_dens.csv
urchin_dens.csv
Primary data file for dataset ID 541003
download
https://osprey.bco-dmo.org/dataset/541003/data/download
download
onLine
dataset
<p>Surveys of <em>S. purpuratus</em> occupancy</p>
<p>We quantified occupied and unoccupied burrows in intertidal bedrock; these burrows are directly attributable to <em>S. purpuratus</em>. The rock walls of burrows are clean while urchins occupy them, but sessile invertebrates such as barnacles, spirorbid worms and anemones rapidly (within weeks) colonize vacated burrows. We used this distinctive indicator to estimate pre-HAB urchin populations, calculating pre-HAB density as the combined density of live urchins plus clean, empty burrows. We calibrated this quantity using the average occupancy rate of burrows at four control sites (Van Damme State Park, Arena Cove, Palomarin, Duxbury Reef). We began mortality surveys at three sites (Phillips Gulch, Windermere Point, Bodega Marine Reserve) within two weeks of initial observations of an harmful algal bloom (HAB), once tides became low enough to access urchin habitat. We completed initial population surveys at the remaining sites during the first three accessible low tide series following the HAB, between October and December 2011.</p>
Specified by the Principal Investigator(s)
<p>To estimate swath length we first summed the Euclidean distances between consecutive GPS trackpoints. Given the GPS had an error of +/- 3 meters we smoothed the GPS tracks by averaging across two trackpoints and then by three. We selected a window size of two with which to estimate our total transect length to adjust for the noise in our swath transects but to minimize oversmoothing. (see example figure below). We identified and removed outlying trackpoints that led to a Euclidean distance &gt;=8 meters (likely due to temporarily poor satellite signal). The distance was then recalculated between the trackpoints immediately preceding and following the removed trackpoint. Total transect search area was calculated by multiplying the total adjusted transect length by swath width. Total transect search time was estimated using field notes and GPS waypoints and trackpoints, removing 6-second intervals where &lt; 0.05 m were traveled (suggesting this was time during which notes were being written or tissues samples were being collected).</p>
<p>Swath&nbsp;figure: Sample GPS tracks for two transects at Iversen Point, Mendocino County. The blue line is the original unsmoothed track. The red line represents a window size of two, averaging latitudes and longitudes across each pair of consecutive trackpoints. The green line represents a window size of 3, averaging across 3 trackpoints.</p>
<p><a href="http://dmoserv3.whoi.edu/data_docs/CHIPS01/fig_swath_Dawson-Gaylord.png" target="_blank"><img alt="map of sample track" src="https://datadocs.bco-dmo.org/d3/data_docs/CHIPS01/fig_swath_Dawson-Gaylord.png" style="height:358px; width:500px" /></a></p>
<p><strong>BCO-DMO Processing Notes:</strong></p>
<ul>
<li>added conventional header with dataset name, PI name, version date, reference information</li>
<li>renamed parameters to BCO-DMO standard</li>
<li>added longitude column</li>
</ul>
Specified by the Principal Investigator(s)
asNeeded
7.x-1.1
Biological and Chemical Oceanography Data Management Office (BCO-DMO)
Unavailable
508-289-2009
WHOI MS#36
Woods Hole
MA
02543
USA
info@bco-dmo.org
http://www.bco-dmo.org
Monday - Friday 8:00am - 5:00pm
For questions regarding this resource, please contact BCO-DMO via the email address provided.
pointOfContact
Deployment: CalifCoast_Gaylord_CHIPS
CalifCoast_Gaylord_CHIPS
shoreside Calif_shore
shoreside
CalifCoast_Gaylord_CHIPS
Brian Gaylord
University of California - Davis: Bodega Marine Laboratory
shoreside Calif_shore
shoreside