Data

Dive surveys of long spined sea urchin (Centrostephanus rodgersii) and barrens habitat, Tasmania

University of Tasmania, Australia
Johnson, Craig
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/7e31c190-0a7e-11dd-857c-00188b4c0af8&rft.title=Dive surveys of long spined sea urchin (Centrostephanus rodgersii) and barrens habitat, Tasmania&rft.identifier=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/7e31c190-0a7e-11dd-857c-00188b4c0af8&rft.description=The spatial extent of the long spined sea urchin, Centrostephanus rodgersii, was estimated by divers using underwater visual census methods to survey rocky reef habitats at 13 regions along Tasmania's east coast (between Eddystone Point and Recherche Bay). Within each region 3 subsites were surveyed, and within each subsite 4 belt transects were surveyed.Divers recorded depth, percent substrata type, percent C. rodgersii barrens habitat; abundance of urchins (C. rodgersii and H. erythrogramma), rock lobster (J. edwardsii) and abalone (H. rubra). Divers also recorded algal cover (estimated), C. rodgersii barrens and substratum type using set categories (see below).Maintenance and Update Frequency: notPlannedStatement: Within each of the 13 regions, 3 subsites were surveyed, and within each subsite 4 belt transects were set perpendicular to the shore spanning 3-18 m in depth (with transect length a maximum of 100 m). For each 5 x 1m section along both sides of the transect line divers recorded depth, percent substrata type, percent C. rodgersii barrens habitat; abundance of urchins (C. rodgersii and H. erythrogramma), rock lobster (J. edwardsii) and abalone (H. rubra). Algal cover (percent per species or guild) was also estimated to the nearest 5% for each 5 x 1 m section for both sides of the transect line. Divers classified habitat as C. rodgersii barrens when foliose macroalgae was lacking and locally abundant C. rodgersii individuals were present. Areas of grazed substratum could be discerned unambiguously. The substratum was classified either as flat rock shelves, very large boulders, large boulders, small boulders, cobble, pebble, gravel, or sand. Transect position was recorded using a GPS point for the start and finish of each transect.Statement: GPS used datum WGS84. Note GPS inaccuracy may have resulted if datum type unknowingly changed etc (e.g. some data points appear on land, however subsite names give some reference as to point location).&rft.creator=Johnson, Craig &rft.date=2008&rft.coverage=westlimit=144.5; southlimit=-44; eastlimit=148.5; northlimit=-39.5&rft.coverage=westlimit=144.5; southlimit=-44; eastlimit=148.5; northlimit=-39.5&rft.coverage=uplimit=19; downlimit=1&rft.coverage=uplimit=19; downlimit=1&rft_rights=Creative Commons Attribution 4.0 International License http://creativecommons.org/licenses/by/4.0/&rft_rights=The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).&rft_rights=The data described in this record are the intellectual property of the University of Tasmania through the School of Zoology and the Tasmanian Aquaculture and Fisheries Institute.&rft_subject=biota&rft_subject=25 211001&rft_subject=Centrostephanus rodgersii&rft_subject=25 247001&rft_subject=Heliocidaris erythrogramma&rft_subject=28 820001&rft_subject=Jasus edwardsii&rft_subject=24 038006&rft_subject=Haliotis rubra&rft_subject=24 038004&rft_subject=Haliotis laevigata&rft_subject=Marine and Estuarine Ecology (incl. Marine Ichthyology)&rft_subject=BIOLOGICAL SCIENCES&rft_subject=ECOLOGY&rft_subject=Ecosystem Function&rft_subject=ENVIRONMENTAL SCIENCES&rft_subject=ECOLOGICAL APPLICATIONS&rft_subject=Abundance of biota&rft_subject=Cover of urchin barren&rft_subject=Substratum&rft_subject=Algal cover&rft.type=dataset&rft.language=English Access the data
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The citation in a list of references is: citation author name/s (year metadata published), metadata title. Citation author organisation/s. File identifier and Data accessed at (add http link).

The data described in this record are the intellectual property of the University of Tasmania through the School of Zoology and the Tasmanian Aquaculture and Fisheries Institute.

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The spatial extent of the long spined sea urchin, Centrostephanus rodgersii, was estimated by divers using underwater visual census methods to survey rocky reef habitats at 13 regions along Tasmania's east coast (between Eddystone Point and Recherche Bay). Within each region 3 subsites were surveyed, and within each subsite 4 belt transects were surveyed.

Divers recorded depth, percent substrata type, percent C. rodgersii barrens habitat; abundance of urchins (C. rodgersii and H. erythrogramma), rock lobster (J. edwardsii) and abalone (H. rubra). Divers also recorded algal cover (estimated), C. rodgersii barrens and substratum type using set categories (see below).

Lineage

Maintenance and Update Frequency: notPlanned
Statement: Within each of the 13 regions, 3 subsites were surveyed, and within each subsite 4 belt transects were set perpendicular to the shore spanning 3-18 m in depth (with transect length a maximum of 100 m). For each 5 x 1m section along both sides of the transect line divers recorded depth, percent substrata type, percent C. rodgersii barrens habitat; abundance of urchins (C. rodgersii and H. erythrogramma), rock lobster (J. edwardsii) and abalone (H. rubra). Algal cover (percent per species or guild) was also estimated to the nearest 5% for each 5 x 1 m section for both sides of the transect line. Divers classified habitat as C. rodgersii barrens when foliose macroalgae was lacking and locally abundant C. rodgersii individuals were present. Areas of grazed substratum could be discerned unambiguously. The substratum was classified either as flat rock shelves, very large boulders, large boulders, small boulders, cobble, pebble, gravel, or sand. Transect position was recorded using a GPS point for the start and finish of each transect.
Statement: GPS used datum WGS84. Note GPS inaccuracy may have resulted if datum type unknowingly changed etc (e.g. some data points appear on land, however subsite names give some reference as to point location).

Notes

Credit
Ling, Scott
Credit
Ross, Jeff
Credit
Funding: FRDC project 2001/044
Purpose
To determine the distribution of the long spined sea urchin (Centrostephanus rodgersii) on the east coast of Tasmania, to estimate the cover of C. rodgersii barrens on the east coast, and to compare the standing stocks of commercially harvested black lip abalone (Haliotis rubra) and southern rock lobster (Jasus edwardsii) in barrens habitat with that of adjacent seaweed beds.

Created: 2008-04-15

Data time period: 2001-09-03 to 2002-06-06

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148.5,-39.5 148.5,-44 144.5,-44 144.5,-39.5 148.5,-39.5

146.5,-41.75

text: westlimit=144.5; southlimit=-44; eastlimit=148.5; northlimit=-39.5

text: uplimit=19; downlimit=1

Subjects
24 038004 | 24 038006 | 25 211001 | 25 247001 | 28 820001 | Abundance of biota | Algal cover | Biological Sciences | Centrostephanus rodgersii | Cover of urchin barren | Ecological Applications | Ecology | Environmental Sciences | Ecosystem Function | Haliotis laevigata | Haliotis rubra | Heliocidaris erythrogramma | Jasus edwardsii | Marine and Estuarine Ecology (Incl. Marine Ichthyology) | Substratum | biota |

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Other Information
(DATA - dive data 13 regions Eastern Tas [direct download])

url : https://data.imas.utas.edu.au/attachments/7e31c190-0a7e-11dd-857c-00188b4c0af8/GPS_coordinates_dive_transects_FRDC_____survey_2001_044.xls

(DATA - raw dive survey data [direct download])

url : https://data.imas.utas.edu.au/attachments/7e31c190-0a7e-11dd-857c-00188b4c0af8/dive_surveydata_raw_coastwide_surve____y_FRDC_2001_044.xls

(SUPPLEMENTARY INFO - GPS coordinates for dive survey transects [direct download])

url : https://data.imas.utas.edu.au/attachments/7e31c190-0a7e-11dd-857c-00188b4c0af8/GPS_coordinates_dive_transects_FRDC_____survey_2001_044.xls

Identifiers
  • global : 7e31c190-0a7e-11dd-857c-00188b4c0af8
ACN 633 798 857