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OAS accession Detail for 0277329
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| accessions_id: | 0277329 | archive |
|---|---|
| Title: | Kelp forest community surveys on invertebrate and algal density from nearshore in Monterey and Carmel starting in 1999 (Kelp Forest Resilience project) (NCEI Accession 0277329) |
| Abstract: | This dataset contains biological and survey - biological data collected at Long Marine Lab UCSC during deployment Carr_1999 in the North Pacific Ocean from 1999-09-07 to 2016-11-02. These data include depth and species. These data were collected by Mark Carr and Tim Tinker of University of California-Santa Cruz as part of the "Kelp forest community resilience in action: adaptive responses of predators to a disease-driven food web perturbation (Kelp_Forest_Resilience)" project. The Biological and Chemical Oceanography Data Management Office (BCO-DMO) submitted these data to NCEI on 2023-01-23. The following is the text of the dataset description provided by BCO-DMO: Kelp forest community surveys on invertebrate and algal density. Dataset Description: This metadata record documents the kelp forest community survey component of the investigators' project. Data generated by these surveys consists of the following recorded on "transects" (described in Methodology section below): (i) the number and size of individuals greater than 2.5 cm diameter of all sea star species as well as notation of evidence of disease, (ii) the number and size of individuals greater than 2.5 cm diameter of both sea urchin species ( Strongylocentrotus purpuratus and Mesocentrotus franciscanus ) as well as notation of evidence of disease, (iii) density (individuals per 60m2) of all conspicuous invertebrates and macroalgae. |
| Date received: | 20230123 |
| Start date: | 19990907 |
| End date: | 20161102 |
| Seanames: | Monterey Bay National Marine Sanctuary, North Pacific Ocean |
| West boundary: | -121.982 |
| East boundary: | -121.895 |
| North boundary: | 36.64 |
| South boundary: | 36.398 |
| Observation types: | biological, survey - biological |
| Instrument types: | |
| Datatypes: | DEPTH - OBSERVATION, SPECIES IDENTIFICATION |
| Submitter: | |
| Submitting institution: | Biological and Chemical Oceanography Data Management Office |
| Collecting institutions: | University of California - Santa Cruz |
| Contributing projects: | |
| Platforms: | |
| Number of observations: | |
| Supplementary information: | Acquisition Description: Sampling consists of visual surveys of the density (number per 60m2) of all non-cryptic sessile and mobile solitary invertebrates and macroalgae by SCUBA divers. In addition, sizes of select species (sea urchins, abalone, giant kelp) are recorded. Surveys are conducted at sites distributed throughout the study region (Carmel Bay and southern Monterey Bay). Each sample site is divided into three "zones" (by depth - 20m, 12.5m, 5m - or from offshore to inshore at sites with little depth variation) to assure that samples are distributed across the face of a reef from inshore to offshore. Where possible, taxa (or taxonomic categories) are enumerated on six transects stratified across the three depth strata (two per stratum) per site (typically a 100m length of coastline, extending from onshore to the 20m isobath). Each "transect" is a 2m x 30m swath haphazardly located within one of the three depth strata. Transects within a stratum are separated end-to-end by approximately 5m. Sampling of each transect is conducted by three divers simultaneously. One diver records the number of individual invertebrates and macroalgae within each of three 10m-long segments of the 60m2 swath. A second diver records the organism and substratum type beneath each of 30 points uniformly distributed along the 30m length of the transect (i.e. 1.0m increments) and the vertical relief (highest to lowest height of the reef surface) within a 0.5m long by 1m wide area centered on each uniform point. A third diver records the number and size of sea urchins and abalone within each of the 10m long segments of the 60m2 swath. High densities of any species are enumerated by recording the distance along the transect at which 30 individuals are recorded within each 10m segment of the 30m-long transect. Surveys are designed to measure year-to-year site-wide variability in species density or percent cover, from which community structure and interannual dynamics are derived. |
| Availability date: | |
| Metadata version: | 1 |
| Keydate: | 2023-04-01 14:44:54+00 |
| Editdate: | 2023-04-01 14:45:38+00 |