Dataset: Comparison of recruitment dynamics in five intertidal marine invertebrates following mass mortality along the northeastern Pacific coastline in 2005 (CHIPS project)

ValidatedRelease Date:2022-08-16Final no updates expectedDOI: 10.26008/1912/bco-dmo.562467.1Version 1 (2015-08-06)Dataset Type:Cruise Results

Principal Investigator: Michael N. Dawson (University of California-Merced)

Co-Principal Investigator: Brian Gaylord (University of California - Davis: Bodega Marine Laboratory)

Co-Principal Investigator: Richard K. Grosberg (University of California-Davis)

Student: Laura J. Jurgens (University of California - Davis: Bodega Marine Laboratory)

Student, Contact: Lauren Schiebelhut (University of California-Merced)

BCO-DMO Data Manager: Nancy Copley (Woods Hole Oceanographic Institution)

BCO-DMO Data Manager: Sawyer Newman (Woods Hole Oceanographic Institution)


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


Abstract

Twenty accessible rocky intertidal sites were selected to span the ‘kill-zone’ and peripheral locations (see list of sites in Schiebelhut et al. in prep; see also Jurgens et al. 2015). 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 (1m2 [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. This data ...

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Quadrats for C. stelleri, Henricia sp., Leptasterias sp., P. ochraceus:
We exhaustively searched 32-40 one-meter square quadrats per site (i.e. 16-20 per each of 2 areas), recording GPS waypoint, time, percent cover of major habitat types, and abundances and sizes of target species for each quadrat. Quadrat locations were selected by first finding one of the target habitat types - surf grass, low-zone red algae, coralline turf, cobble or boulder field, urchin pools with pits either empty or occupied, or mussel bed - selecting a starting point haphazardly, and then using a random numbers table to choose specific quadrat locations. Some sites had fewer than 32 quadrats or quadrats smaller than one-square meter due to the limited time in which we could work in suitable habitat. For mussel habitat one 0.25 m x 0.25 m quadrat was used. For Schiebelhut et al. (in prep) we calculated the number of each target species summed across all quadrats surveyed within each of the two areas within sites.

Swaths for C. stelleri, Henricia sp., Leptasterias sp., P. ochraceus:
Timed, GPS-tracked, 2 m wide swath transects were nested within each of the two areas within all sites. From a distance, an approximate starting point and orientation (with landmarks) for the starting transect was selected. The GPS was set to auto-record a trackpoint every 6 seconds. Transects ran from the most shoreward to the most seaward possible suitable habitat at approximately 10 m intervals along shore, particularly targeting the low zone when the tide was the lowest, with as many transects being done as permitted by the tide. The start and end of each transect was GPS waypointed and recorded. All target species were searched for across the 2 m wide swath, with intertidal zones and habitat type recorded. A waypoint was recorded for each individual target species, with any additional species found within a meter being counted and recorded for the same waypoint. When the field of view was clear some swaths were extended to 4 meters wide. For Jurgens et al. (submitted) we calculated the number of each target species summed across all swaths within each of the two areas within sites.


Related Datasets

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Dataset: Seastar and chiton counts - quadrats and swaths
Gaylord, B., Dawson, M. N., Grosberg, R. K. (2014) Counts of seastars and chiton in quadrats and swaths, north-central California coast: Andrew Molean State Park to Manchester State Park from 2005-2014 (CHIPS project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2014-10-13) Version Date 2014-10-13 http://lod.bco-dmo.org/id/dataset/528940
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Dataset: Purple urchin density by depth
Gaylord, B., Dawson, M. N., Grosberg, R. K. (2014) 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). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 2014-11-24) Version Date 2014-11-24 http://lod.bco-dmo.org/id/dataset/541036
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Dataset: Purple urchin density
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 http://lod.bco-dmo.org/id/dataset/541003
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Dataset: Henricia counts
Gaylord, B., Dawson, M. N., Grosberg, R. K. (2015) Counts of Henricia sp. adults and recruits in quadrats, north-central California coast: Andrew Molean State Park to Manchester State Park from 2005-2014 (CHIPS project). Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 4) Version Date 2015-07-15 http://lod.bco-dmo.org/id/dataset/528964

Related Publications

Results

Schiebelhut, L. M., Gaylord, B., Grosberg, R. K., Jurgens, L. J., & Dawson, M. N. (2022). Species’ attributes predict the relative magnitude of ecological and genetic recovery following mass mortality. Molecular Ecology, 31(22), 5714–5728. Portico. https://doi.org/10.1111/mec.16707
Methods

(2015). Correction: Patterns of Mass Mortality among Rocky Shore Invertebrates across 100 km of Northeastern Pacific Coastline. PLOS ONE, 10(6), e0131969. https://doi.org/10.1371/journal.pone.0131969