http://lod.bco-dmo.org/id/dataset/850372
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
2021-04-27
ISO 19115-2 Geographic Information - Metadata - Part 2: Extensions for Imagery and Gridded Data
ISO 19115-2:2009(E)
Densities of small corals in Diadema halos and temporal stability of D. antillarum clusters from surveys in St. John, US Virgin Islands in 2019 and 2020
2021-04-27
publication
2021-04-27
revision
Marine Biological Laboratory/Woods Hole Oceanographic Institution Library (MBLWHOI DLA)
2021-05-04
publication
https://doi.org/10.26008/1912/bco-dmo.850372.1
Peter J. Edmunds
California State University Northridge
principalInvestigator
Lindsey Stockton
California State University Northridge
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: Edmunds, P. J., Stockton, L. (2021) Densities of small corals in Diadema halos and temporal stability of D. antillarum clusters from surveys in St. John, US Virgin Islands in 2019 and 2020. Biological and Chemical Oceanography Data Management Office (BCO-DMO). (Version 1) Version Date 2021-04-27 [if applicable, indicate subset used]. doi:10.26008/1912/bco-dmo.850372.1 [access date]
Methods and Sampling: <p>Location:&nbsp;St. John, US Virgin Islands &nbsp;18.316°N, -64.725°W.<br />
<br />
<strong>Excerpt from Stockton and Edmunds (2021) in&nbsp;the publication Journal of Experimental Marine Biology and Ecology</strong></p>
<p><strong>Overview</strong></p>
<p>Research was completed at &lt; 7-m depth on shallow reefs in Great Lameshur Bay on the south shore of St. John, US Virgin Islands (18.316°N, -64.725°W). Surveys were completed in July and August of 2019 and continued in January 2020. The study sites are in the Virgin Islands National Park, where they have been protected since 1956. The density of small corals inside and outside of <em>Diadema</em> halos was measured along the shores of two headlands, Yawzi Point and Cabritte Horn, along which spatially aggressive peyssonnelid algal crusts (PAC) differed in abundance. At the tips of the headlands, a zone of high PAC cover was found, within which in situ surveys using subdivided quadrats (described below) revealed that PAC cover was ≥ ~ 10%, with some areas of benthos fully covered by PAC. Northward of this zone at each headland, the cover of PAC was lower &lt; ~10% (also surveyed using subdivided quadrats), and the distinction between the two zones was visible as a transitional area several meters in width. Surveys were completed along ~ 100 m of shore within each PAC zone, and the transitional area was avoided for sampling. The two PAC hereafter are referred to as “Low-PAC” (&lt; ~10% cover) and “High-PAC” (≥ ~10% cover). The causes of this gradient in PAC distribution remain unclear, but extensive surveys in this location have demonstrated higher abundance at exposed sites, which suggests that growth and recruitment of PAC is promoted by water motion.</p>
<p>Within each PAC zone, <em>Diadema</em> clusters were identified based on the presence of ≥ 4 sea urchins located ≤ 0.5 m from one another in shallow water (1.5-7.0 m depth), and they were haphazardly selected for the quantification of small corals in <em>Diadema</em> halos and on adjacent substrata. In this experimental design, each <em>Diadema</em> halo and the adjacent substrata were treated as plots nested within PAC zones, and they were sampled as encountered while working along each headland. Sampling initially was conducted along each headland to maintain a balanced design between zones, although fieldwork in January 2020 resulted in Cabritte Horn being sampled more extensively. Overall, 60 clusters of <em>Diadema </em>were sampled at Cabritte Horn (30 in each PAC zone), and 40 clusters at Yawzi Point (20 in each PAC zone), with each cluster sampled in a paired design with quadrats surveyed within the <em>Diadema</em> halo and on adjacent substrata.</p>
<p><strong>Densities of small corals in <em>Diadema</em> halos&nbsp; </strong></p>
<p>To test the hypothesis that <em>Diadema</em> halos provide a refuge for small corals in habitats dominated by PAC, clusters of <em>D. antillarum</em> were haphazardly selected in the Low-PAC and High-PAC zones of each headland. For each cluster, the abundance of small corals was quantified in the <em>Diadema</em> halo, and also on adjacent substrata outside the <em>Diadema </em>halo. PAC cover was quantified adjacent to the <em>Diadema</em> halo using the same quadrats used to determine the abundance of small corals. Although the sizes of the <em>D. antillarum</em> were not quantified, the clusters were created by adult sea urchins estimated to have test diameters &gt; ~ 2 cm. Each cluster was surrounded by a halo (~ 50-cm width) of cleared substratum that was conspicuous in locations with high cover of PAC and other macroalgae.</p>
<p>Clusters of <em>Diadema</em> were common at Yawzi Point and Cabritte Horn, and were composed of 4–28 sea urchins. Twenty clusters of <em>Diadema</em> (and their halos) were surveyed in the Low-PAC and High-PAC zones at Yawzi Point and Cabritte Horn in July and August 2019. At Cabritte Horn, 10 additional <em>Diadema </em>clusters in each PAC zone were surveyed in January 2020, with these surveys were completed in areas differing from those surveyed in the previous summer. Summer and winter samplings at Cabritte Horn were considered a single sampling, based on the assumption that the 5 months between them was not ecologically meaningful in terms of changes in density of small corals.</p>
<p>The density of small corals was measured using quadrats (0.25 × 0.25 m) that were haphazardly placed on the substratum, either within the <em>Diadema</em> halo, or on adjacent substrata outside of the halo (n = 5 within the <em>Diadema</em> halo, n = 5 on adjacent substrata). Haphazard placement was ensured by deploying the quadrat without looking at the substratum, and in the halos, haphazard placement was modified with the restriction that one side of the quadrat was in contact with the tips of the spines of the sea urchins; this ensured the quadrats were within the halos. Outside the halo, quadrats were randomly located &lt; 5 m from the halo margin. Small corals were counted when ≥ 50% of their area was within each quadrat, and their densities were expressed per square meter, which assumes that the density in the 0.25 × 0.25 m quadrats is 1/16th of that recorded in 1 x 1 m areas. In each quadrat, the density of small corals (≤ 4-cm diameter) was recorded by genus or species depending on the capacity to identify each taxon based on morphology. The percentage cover of PAC outside the halo was quantified using the same quadrats, which were subdivided into 25 sub-squares (each 5 × 5 cm). Sub-squares were scored for dominance of PAC, thereby allowing this substratum category to be quantified with 4% resolution.</p>
<p><strong>Temporal stability of <em>D. antillarum</em> clusters</strong></p>
<p>Testing of the hypothesis that <em>Diadema </em>halos provided refuges for small corals in PAC-dominated seascapes relies on <em>Diadema</em> clusters (and their halos) remaining in the same location long enough for corals to recruit to this microhabitat. To quantify the persistence of <em>Diadema</em> halos (hereafter “cluster stability”), the positions of haphazardly selected clusters were recorded over 9 days in January 2020 at Yawzi Point, and over 6 months at Cabritte Horn. At Yawzi Point, the positions of <em>Diadema</em> clusters (n = 6) were temporarily recorded with markers to allow subsequent relocation; their positions were evaluated every few days using photographs, and at the end of the 9 day period. Longer-term cluster stability was evaluated at Cabritte Horn where two <em>Diadema</em> clusters were photographed in July 2019 so that physical features of the benthos could be used to identify the same locations in January 2020. Over both time scales, it was not possible to determine whether the clusters of <em>D. antillarum </em>were composed of the same individuals, but this possibility was not relevant to evaluating whether the product of clustering (i.e., <em>Diadema</em> halos) remained in the same location.<br />
<br />
<strong>Pooled data</strong><br />
<br />
See Supplementary Files for access to the data tables published in Stockton and Edmunds (2021) which aggregated this dataset.&nbsp; These data were aggregated by site, zone, and taxon and published as table S1 "Taxa Specific Densities" and aggregated by Site, Zone, Cluster, Position, and Quadrat and published as Figure 2 "Pooled taxa for both sites."</p>
<p>See Stockton &amp; Edmunds (2021) for results and a description of the statistical analyses performed on this dataset.</p>
Funding provided by NSF Division of Environmental Biology (NSF DEB) Award Number: DEB-1350146 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1350146
Funding provided by NSF Division of Ocean Sciences (NSF OCE) Award Number: OCE-1756678 Award URL: https://www.nsf.gov/awardsearch/show-award?AWD_ID=1756678
completed
Peter J. Edmunds
California State University Northridge
818-677-2502
Department of Biology 18111 Nordhoff Street
Northridge
CA
91330-8303
USA
peter.edmunds@csun.edu
pointOfContact
Lindsey Stockton
California State University Northridge
lstockton3@gmail.com
pointOfContact
asNeeded
Dataset Version: 1
Unknown
Date
Site
PAC_cover
Cluster
Position
Quadrat
Sea_Urchin_Count
Coral_Count
PAC
Lat
Lon
theme
None, User defined
date
site
sample description
number
latitude
longitude
featureType
BCO-DMO Standard Parameters
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.
RUI-LTREB Renewal: Three decades of coral reef community dynamics in St. John, USVI: 2014-2019
http://coralreefs.csun.edu/
RUI-LTREB Renewal: Three decades of coral reef community dynamics in St. John, USVI: 2014-2019
<p>Describing how ecosystems like coral reefs are changing is at the forefront of efforts to evaluate the biological consequences of global climate change and ocean acidification. Coral reefs have become the poster child of these efforts. Amid concern that they could become ecologically extinct within a century, describing what has been lost, what is left, and what is at risk, is of paramount importance. This project exploits an unrivalled legacy of information beginning in 1987 to evaluate the form in which reefs will persist, and the extent to which they will be able to resist further onslaughts of environmental challenges. This long-term project continues a 27-year study of Caribbean coral reefs. The diverse data collected will allow the investigators to determine the roles of local and global disturbances in reef degradation. The data will also reveal the structure and function of reefs in a future with more human disturbances, when corals may no longer dominate tropical reefs.</p>
<p>The broad societal impacts of this project include advancing understanding of an ecosystem that has long been held emblematic of the beauty, diversity, and delicacy of the biological world. Proposed research will expose new generations of undergraduate and graduate students to natural history and the quantitative assessment of the ways in which our planet is changing. This training will lead to a more profound understanding of contemporary ecology at the same time that it promotes excellence in STEM careers and supports technology infrastructure in the United States. Partnerships will be established between universities and high schools to bring university faculty and students in contact with k-12 educators and their students, allow teachers to carry out research in inspiring coral reef locations, and motivate children to pursue STEM careers. Open access to decades of legacy data will stimulate further research and teaching.</p>
RUI-LTREB
largerWorkCitation
project
Collaborative Research: Pattern and process in the abundance and recruitment of Caribbean octocorals
https://osprey.bco-dmo.org/project/752508
Collaborative Research: Pattern and process in the abundance and recruitment of Caribbean octocorals
<p><em>NSF Award Abstract:</em><br />
Coral reefs are exposed to a diversity of natural and anthropogenic disturbances, and the consequences for ecosystem degradation have been widely publicized. However, the reported changes have been biased towards fishes and stony corals, and for Caribbean reefs, the most notable example of this bias are octocorals ("soft corals"). Although they are abundant and dominate many Caribbean reefs, they are rarely included in studies due to the difficulty of both identifying them and in quantifying their abundances. In some places there is compelling evidence that soft corals have increased in abundance, even while stony corals have become less common. This suggests that soft corals are more resilient than stony corals to the wide diversity of disturbances that have been impacting coral corals. The best coral reefs on which to study these changes are those that have been studied for decades and can provide a decadal context to more recent events, and in this regard the reefs of St. John, US Virgin Islands are unique. Stony corals on the reefs have been studied since 1987, and the soft corals from 2014. This provides unrivalled platform to evaluate patterns of octocoral abundance and recruitment; identify the patterns of change that are occurring on these reefs, and identify the processes responsible for the resilience of octocoral populations. The project will extend soft coral monitoring from 4 years to 8 years, and within this framework will examine the roles of baby corals, and their response to seafloor roughness, seawater flow, and seaweed, in determining the success of soft corals. The work will also assess whether the destructive effects of Hurricanes Irma and Maria have modified the pattern of change. In concert with these efforts the project will be closely integrated with local high schools at which the investigators will host marine biology clubs and provide independent study opportunities for their students and teachers. Unique training opportunities will be provided to undergraduate and graduate students, as well as a postdoctoral researcher, all of whom will study and work in St. John, and the investigators will train coral reef researchers to identify the species of soft corals through a hands-on workshop to be conducted in the Florida Keys.</p>
<p>Understanding how changing environmental conditions will affect the community structure of major biomes is the ecological objective defining the 21st century. The holistic effects of these conditions on coral reefs will be studied on shallow reefs within the Virgin Islands National Park in St. John, US Virgin Islands, which is the site of one of the longest-running, long-term studies of coral reef community dynamics in the region. With NSF-LTREB support, the investigators have been studying long-term changes in stony coral communities in this location since 1987, and in 2014 NSF-OCE support was used to build an octocoral "overlay" to this decadal perspective. The present project extends from this unique history, which has been punctuated by the effects of Hurricanes Irma and Maria, to place octocoral synecology in a decadal context, and the investigators exploit a rich suite of legacy data to better understand the present and immediate future of Caribbean coral reefs. This four-year project will advance on two concurrent fronts: first, to extend time-series analyses of octocoral communities from four to eight years to characterize the pattern and pace of change in community structure, and second, to conduct a program of hypothesis-driven experiments focused on octocoral settlement that will uncover the mechanisms allowing octocorals to more effectively colonize substrata than scleractinian corals on present day reefs. Specifically, the investigators will conduct mensurative and manipulative experiments addressing four hypotheses focusing on the roles of: (1) habitat complexity in distinguishing between octocoral and scleractinian recruitment niches, (2) the recruitment niche in mediating post-settlement success, (3) competition in algal turf and macroalgae in determining the success of octocoral and scleractian recruits, and (4) role of octocoral canopies in modulating the flux of particles and larvae to the seafloor beneath. The results of this study will be integrated to evaluate the factors driving higher ecological resilience of octocorals versus scleractinians on present-day Caribbean reefs.</p>
<p>This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.</p>
Octocoral Community Dynamics
largerWorkCitation
project
eng; USA
oceans
-64.726
-64.722
18.309
18.316
2019-07-30
2020-01-25
From projects that focused on the following 2 locations: 1. USVI 2. St. John, US Virgin Islands
0
BCO-DMO catalogue of parameters from Densities of small corals in Diadema halos and temporal stability of D. antillarum clusters from surveys in St. John, US Virgin Islands in 2019 and 2020
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/850395.rdf
Name: Date
Units: unitless
Description: <p>Date of when was survey taken</p>
http://lod.bco-dmo.org/id/dataset-parameter/850396.rdf
Name: Site
Units: unitless
Description: <p>Site (Yawzi Point, Cabritte Horn)</p>
http://lod.bco-dmo.org/id/dataset-parameter/850397.rdf
Name: PAC_cover
Units: unitless
Description: <p>PAC cover (High-PAC ≥ ~10%, Low-PAC <~10%)</p>
http://lod.bco-dmo.org/id/dataset-parameter/850398.rdf
Name: Cluster
Units: unitless
Description: <p>Unique cluster number</p>
http://lod.bco-dmo.org/id/dataset-parameter/850399.rdf
Name: Position
Units: unitless
Description: <p>Quadrat (0.25 × 0.25 m) position in respect to Diadema-halo (in, out)</p>
http://lod.bco-dmo.org/id/dataset-parameter/850400.rdf
Name: Quadrat
Units: unitless
Description: <p>Unique quadrat number per cluster and position (1-5)</p>
http://lod.bco-dmo.org/id/dataset-parameter/850401.rdf
Name: Sea_Urchin_Count
Units: unitless
Description: <p>Number of Diadema found in cluster (number of sea urchins).</p>
http://lod.bco-dmo.org/id/dataset-parameter/850402.rdf
Name: Coral_Count
Units: unitless
Description: <p>Number of small corals (≤ 4-cm diameter) found in individual quadrat (0.25 × 0.25 m). (number of corals).</p>
http://lod.bco-dmo.org/id/dataset-parameter/850403.rdf
Name: PAC
Units: unitless
Description: <p>Number of subdivided squares ( 25 squares, 5 cm x 5 cm) dominated by PAC (>50%) within quadrat (0.25 × 0.25 m), thereby allowing this substratum category to be quantified with 4% resolution.</p>
http://lod.bco-dmo.org/id/dataset-parameter/851243.rdf
Name: Lat
Units: decimal degrees
Description: <p>Site latitude.</p>
http://lod.bco-dmo.org/id/dataset-parameter/851244.rdf
Name: Lon
Units: decimal degrees
Description: <p>Site longitude (west is negative).</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
62468
https://darchive.mblwhoilibrary.org/bitstream/1912/27040/1/dataset-850372_densities-small-corals-diadema-halos-and-temporal-stability-d-antillarum-clusters__v1.tsv
download
https://doi.org/10.26008/1912/bco-dmo.850372.1
download
onLine
dataset
<p>Location:&nbsp;St. John, US Virgin Islands &nbsp;18.316°N, -64.725°W.<br />
<br />
<strong>Excerpt from Stockton and Edmunds (2021) in&nbsp;the publication Journal of Experimental Marine Biology and Ecology</strong></p>
<p><strong>Overview</strong></p>
<p>Research was completed at &lt; 7-m depth on shallow reefs in Great Lameshur Bay on the south shore of St. John, US Virgin Islands (18.316°N, -64.725°W). Surveys were completed in July and August of 2019 and continued in January 2020. The study sites are in the Virgin Islands National Park, where they have been protected since 1956. The density of small corals inside and outside of <em>Diadema</em> halos was measured along the shores of two headlands, Yawzi Point and Cabritte Horn, along which spatially aggressive peyssonnelid algal crusts (PAC) differed in abundance. At the tips of the headlands, a zone of high PAC cover was found, within which in situ surveys using subdivided quadrats (described below) revealed that PAC cover was ≥ ~ 10%, with some areas of benthos fully covered by PAC. Northward of this zone at each headland, the cover of PAC was lower &lt; ~10% (also surveyed using subdivided quadrats), and the distinction between the two zones was visible as a transitional area several meters in width. Surveys were completed along ~ 100 m of shore within each PAC zone, and the transitional area was avoided for sampling. The two PAC hereafter are referred to as “Low-PAC” (&lt; ~10% cover) and “High-PAC” (≥ ~10% cover). The causes of this gradient in PAC distribution remain unclear, but extensive surveys in this location have demonstrated higher abundance at exposed sites, which suggests that growth and recruitment of PAC is promoted by water motion.</p>
<p>Within each PAC zone, <em>Diadema</em> clusters were identified based on the presence of ≥ 4 sea urchins located ≤ 0.5 m from one another in shallow water (1.5-7.0 m depth), and they were haphazardly selected for the quantification of small corals in <em>Diadema</em> halos and on adjacent substrata. In this experimental design, each <em>Diadema</em> halo and the adjacent substrata were treated as plots nested within PAC zones, and they were sampled as encountered while working along each headland. Sampling initially was conducted along each headland to maintain a balanced design between zones, although fieldwork in January 2020 resulted in Cabritte Horn being sampled more extensively. Overall, 60 clusters of <em>Diadema </em>were sampled at Cabritte Horn (30 in each PAC zone), and 40 clusters at Yawzi Point (20 in each PAC zone), with each cluster sampled in a paired design with quadrats surveyed within the <em>Diadema</em> halo and on adjacent substrata.</p>
<p><strong>Densities of small corals in <em>Diadema</em> halos&nbsp; </strong></p>
<p>To test the hypothesis that <em>Diadema</em> halos provide a refuge for small corals in habitats dominated by PAC, clusters of <em>D. antillarum</em> were haphazardly selected in the Low-PAC and High-PAC zones of each headland. For each cluster, the abundance of small corals was quantified in the <em>Diadema</em> halo, and also on adjacent substrata outside the <em>Diadema </em>halo. PAC cover was quantified adjacent to the <em>Diadema</em> halo using the same quadrats used to determine the abundance of small corals. Although the sizes of the <em>D. antillarum</em> were not quantified, the clusters were created by adult sea urchins estimated to have test diameters &gt; ~ 2 cm. Each cluster was surrounded by a halo (~ 50-cm width) of cleared substratum that was conspicuous in locations with high cover of PAC and other macroalgae.</p>
<p>Clusters of <em>Diadema</em> were common at Yawzi Point and Cabritte Horn, and were composed of 4–28 sea urchins. Twenty clusters of <em>Diadema</em> (and their halos) were surveyed in the Low-PAC and High-PAC zones at Yawzi Point and Cabritte Horn in July and August 2019. At Cabritte Horn, 10 additional <em>Diadema </em>clusters in each PAC zone were surveyed in January 2020, with these surveys were completed in areas differing from those surveyed in the previous summer. Summer and winter samplings at Cabritte Horn were considered a single sampling, based on the assumption that the 5 months between them was not ecologically meaningful in terms of changes in density of small corals.</p>
<p>The density of small corals was measured using quadrats (0.25 × 0.25 m) that were haphazardly placed on the substratum, either within the <em>Diadema</em> halo, or on adjacent substrata outside of the halo (n = 5 within the <em>Diadema</em> halo, n = 5 on adjacent substrata). Haphazard placement was ensured by deploying the quadrat without looking at the substratum, and in the halos, haphazard placement was modified with the restriction that one side of the quadrat was in contact with the tips of the spines of the sea urchins; this ensured the quadrats were within the halos. Outside the halo, quadrats were randomly located &lt; 5 m from the halo margin. Small corals were counted when ≥ 50% of their area was within each quadrat, and their densities were expressed per square meter, which assumes that the density in the 0.25 × 0.25 m quadrats is 1/16th of that recorded in 1 x 1 m areas. In each quadrat, the density of small corals (≤ 4-cm diameter) was recorded by genus or species depending on the capacity to identify each taxon based on morphology. The percentage cover of PAC outside the halo was quantified using the same quadrats, which were subdivided into 25 sub-squares (each 5 × 5 cm). Sub-squares were scored for dominance of PAC, thereby allowing this substratum category to be quantified with 4% resolution.</p>
<p><strong>Temporal stability of <em>D. antillarum</em> clusters</strong></p>
<p>Testing of the hypothesis that <em>Diadema </em>halos provided refuges for small corals in PAC-dominated seascapes relies on <em>Diadema</em> clusters (and their halos) remaining in the same location long enough for corals to recruit to this microhabitat. To quantify the persistence of <em>Diadema</em> halos (hereafter “cluster stability”), the positions of haphazardly selected clusters were recorded over 9 days in January 2020 at Yawzi Point, and over 6 months at Cabritte Horn. At Yawzi Point, the positions of <em>Diadema</em> clusters (n = 6) were temporarily recorded with markers to allow subsequent relocation; their positions were evaluated every few days using photographs, and at the end of the 9 day period. Longer-term cluster stability was evaluated at Cabritte Horn where two <em>Diadema</em> clusters were photographed in July 2019 so that physical features of the benthos could be used to identify the same locations in January 2020. Over both time scales, it was not possible to determine whether the clusters of <em>D. antillarum </em>were composed of the same individuals, but this possibility was not relevant to evaluating whether the product of clustering (i.e., <em>Diadema</em> halos) remained in the same location.<br />
<br />
<strong>Pooled data</strong><br />
<br />
See Supplementary Files for access to the data tables published in Stockton and Edmunds (2021) which aggregated this dataset.&nbsp; These data were aggregated by site, zone, and taxon and published as table S1 "Taxa Specific Densities" and aggregated by Site, Zone, Cluster, Position, and Quadrat and published as Figure 2 "Pooled taxa for both sites."</p>
<p>See Stockton &amp; Edmunds (2021) for results and a description of the statistical analyses performed on this dataset.</p>
Specified by the Principal Investigator(s)
<p>BCO-DMO data manager processing notes:<br />
* Imported Sheet "Total" from Excel file "JEMBE_Data Release_wMetadata_Edmunds Stockton_April 14.xlsx" into the BCO-DMO data system.<br />
* Converted date to ISO 8601 format yyyy-mm-dd<br />
* renamed fields to match BCO-DMO naming conventions (spaces-&gt;underscores).<br />
* Attached the two other data tables from sheets "FigS1_taxon-specific_densities" and "Fig2_pooled_taxa_densities" as supplemental files attached to this dataset.<br />
* Latitude and Longitude columns were added from site locations provided by email.</p>
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