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OAS accession Detail for 0278161
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| accessions_id: | 0278161 | archive |
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| Title: | Kelp forest community structure studied with respect to Clathromorphum bioerosion at central and western Aleutian Islands, Alaska from visual surveys, July 2014 (NCEI Accession 0278161) |
| Abstract: | This dataset contains biological and survey - biological data collected on R/V Point Sur during cruise PS1409 in the Bering Sea from 2014-07-10 to 2014-07-21. These data include abundance and depth. These data were collected by Douglas B. Rasher of Bigelow Laboratory for Ocean Sciences, James Estes of University of California-Santa Cruz, and Robert S. Steneck of University of Maine as part of the "Ocean Acidification: Century Scale Impacts to Ecosystem Structure and Function of Aleutian Kelp Forests (OA Kelp Forest Function)" project and "Science, Engineering and Education for Sustainability NSF-Wide Investment (SEES): Ocean Acidification (formerly CRI-OA) (SEES-OA)" program. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2019-02-25. The following is the text of the dataset description provided by BCO-DMO: Target site benthic survey vegetation - 2014 Dataset Description: Acquisition Description: Prior to examining Clathromorphum nereostratum bioerosion at each focal study site, we characterized the ecological status of the site by quantifying the abundance of its benthic constituents (i.e., kelps, understory algae, coralline algae, etc.) using the same methods that have been employed by us and others over the past 30 years (Estes et al. 2010). We characterized two types of sites: (1) those that have long persisted as urchin barrens (“habitat.type” = “Barren”) and (2) urchin barrens that are situated immediately adjacent to shallow, remnant kelp stands, and thereby receive urchin food subsidies (“habitat.type” = “Barren + kelp subsidy”). At these latter sites, we also surveyed the adjacent kelp stand (“habitat.type” = “Shallow kelp”). At each site, a diver sampled twenty 0.25-m^2 quadrats at the target depth (21-37 feet) and along its contour, taking a random number of kicks between quadrats. Patches of unconsolidated substrate were rare on the rocky reef; however, if one was encountered while sampling, the diver took an additional random number of kicks and again deployed the quadrat. In each quadrat, s/he counted the stipe density of all kelps (by species) and estimated the abundance (percent cover) of fleshy red algae, sessile invertebrates, encrusting coralline algae (almost exclusively C. nereostratum ), branching coralline algae, and other algae such as Desmarestia or Codium species. Percent cover was visually estimated on a scale of 1-6, where 1 = 0-5%, 2 = 6-25%, 3 = 26-50%, 4 = 51-75%, 5 = 76-95%, and 6 = 96-100 % cover. |
| Date received: | 20190225 |
| Start date: | 20140710 |
| End date: | 20140721 |
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| West boundary: | 173.279 |
| East boundary: | -176.615 |
| North boundary: | 52.931 |
| South boundary: | 51.41 |
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| Submitting institution: | Biological and Chemical Oceanography Data Management Office |
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| Metadata version: | 1 |
| Keydate: | 2023-05-14 03:57:37+00 |
| Editdate: | 2023-05-14 03:58:14+00 |