Data

Effect of Centrostephanus rodgersii barrens on standing stocks of abalone and rock-lobster in Tasmania

University of Tasmania, Australia
Johnson, Craig, Prof.
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/679ceb60-0aad-11dd-bf15-00188b4c0af8&rft.title=Effect of Centrostephanus rodgersii barrens on standing stocks of abalone and rock-lobster in Tasmania&rft.identifier=https://metadata.imas.utas.edu.au/geonetwork/srv/eng/catalog.search#/metadata/679ceb60-0aad-11dd-bf15-00188b4c0af8&rft.description=The effect of barrens formed by the long spined sea urchin, Centrostephanus rodgersii, on the standing stocks of southern rock lobsters (Jasus edwardsii) and black lip abalone (Haliotis rubra) was estimated by divers using underwater visual census methods to compare lobster and abalone abundance in barrens with that in adjacent kelp habitat. Abalone (H. rubra) and rock-lobster (J. edwardsii) populations were compared on C. rodgersii barrens and in adjacent algal-dominated habitat at the same depth and on the same substratum type at three sites in eastern Tasmania (Elephant Rock:Binalong Bay, St Helens Is, and Mistaken Cape:Maria Island). At Elephant Rock and St Helens Island , the barrens are extensive and well established Type 1 barrens, while at Mistaken Cape the barrens in 8-14 m are incipient Type 4 barrens, comprising small barren patches in the algal bed (see FRDC report for classification of barren types). Note that while there are extensive barrens in deeper water (>18 m) at Mistaken Cape, at these depths working time is limited and it was difficult to locate intact macroalgal beds on equivalent substrata.Maintenance and Update Frequency: notPlannedStatement: Sampling involved four 50 x 2 m belt transects set within the 15-18 m depth strata in each habitat type (barrens and algal-dominated) at each site. On each transect line, a pair of divers worked to 2 m each side of the line, and for each 5 m section of the transect recorded depth; percentage cover of substratum types; percentage cover C. rodgersii barrens habitat; abundance of sea urchins (C. rodgersii and H. erythrogramma), rock lobster (J. edwardsii) and abalone (H. rubra); and the percentage cover of algal species or guilds. Algal cover was estimated to the nearest 5 % for each 5 x 2 m section, while species occupying less than 5 % cover were recorded as being present. Divers classified habitat as C. rodgersii barrens -characterised 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. For diver names contact researcher or IMAS Data Manager.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, Prof. &rft.date=2008&rft.coverage=westlimit=148.00; southlimit=-43.00; eastlimit=148.50; northlimit=-40.00&rft.coverage=westlimit=148.00; southlimit=-43.00; eastlimit=148.50; northlimit=-40.00&rft.coverage=uplimit=19; downlimit=8&rft.coverage=uplimit=19; downlimit=8&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=ANIMALS/INVERTEBRATES&rft_subject=EARTH SCIENCE&rft_subject=BIOLOGICAL CLASSIFICATION&rft_subject=REEF HABITAT&rft_subject=BIOSPHERE&rft_subject=AQUATIC ECOSYSTEMS&rft_subject=SPECIES COMPETITION&rft_subject=ECOLOGICAL DYNAMICS&rft_subject=SPECIES/POPULATION INTERACTIONS&rft_subject=FISHERIES&rft_subject=BENTHIC HABITAT&rft_subject=CRUSTACEANS&rft_subject=ARTHROPODS&rft_subject=MOLLUSKS&rft_subject=ECHINODERMS&rft_subject=COMMUNITY DYNAMICS&rft_subject=SEA URCHINS&rft_subject=RANGE CHANGES&rft_subject=Temperate Reef&rft_subject=Ecological Impacts of Climate Change&rft_subject=ENVIRONMENTAL SCIENCES&rft_subject=ECOLOGICAL APPLICATIONS&rft_subject=Marine and Estuarine Ecology (incl. Marine Ichthyology)&rft_subject=BIOLOGICAL SCIENCES&rft_subject=ECOLOGY&rft_subject=diver&rft_subject=Coverage of urchin barren&rft_subject=Coverage of algal species or guilds&rft_subject=Coverage of substratum types&rft_subject=Abundance of biota&rft_subject=Biotic taxonomic identification&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 effect of barrens formed by the long spined sea urchin, Centrostephanus rodgersii, on the standing stocks of southern rock lobsters (Jasus edwardsii) and black lip abalone (Haliotis rubra) was estimated by divers using underwater visual census methods to compare lobster and abalone abundance in barrens with that in adjacent kelp habitat.

Abalone (H. rubra) and rock-lobster (J. edwardsii) populations were compared on C. rodgersii barrens and in adjacent algal-dominated habitat at the same depth and on the same substratum type at three sites in eastern Tasmania (Elephant Rock:Binalong Bay, St Helens Is, and Mistaken Cape:Maria Island). At Elephant Rock and St Helens Island , the barrens are extensive and well established Type 1 barrens, while at Mistaken Cape the barrens in 8-14 m are incipient Type 4 barrens, comprising small barren patches in the algal bed (see FRDC report for classification of barren types). Note that while there are extensive barrens in deeper water (>18 m) at Mistaken Cape, at these depths working time is limited and it was difficult to locate intact macroalgal beds on equivalent substrata.

Lineage

Maintenance and Update Frequency: notPlanned
Statement: Sampling involved four 50 x 2 m belt transects set within the 15-18 m depth strata in each habitat type (barrens and algal-dominated) at each site. On each transect line, a pair of divers worked to 2 m each side of the line, and for each 5 m section of the transect recorded depth; percentage cover of substratum types; percentage cover C. rodgersii barrens habitat; abundance of sea urchins (C. rodgersii and H. erythrogramma), rock lobster (J. edwardsii) and abalone (H. rubra); and the percentage cover of algal species or guilds. Algal cover was estimated to the nearest 5 % for each 5 x 2 m section, while species occupying less than 5 % cover were recorded as being present. Divers classified habitat as C. rodgersii barrens -characterised 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. For diver names contact researcher or IMAS Data Manager.
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
Ross, Jeff, Dr
Credit
Ling, Scott
Credit
Funding: FRDC (Project No. 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: 15 04 2008

Data time period: 19 01 2002 to 29 01 2002

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148.5,-40 148.5,-43 148,-43 148,-40 148.5,-40

148.25,-41.5

text: westlimit=148.00; southlimit=-43.00; eastlimit=148.50; northlimit=-40.00

text: uplimit=19; downlimit=8

Subjects
24 038004 | 24 038006 | 25 211001 | 25 247001 | 28 820001 | ANIMALS/INVERTEBRATES | AQUATIC ECOSYSTEMS | ARTHROPODS | Abundance of biota | BENTHIC HABITAT | BIOLOGICAL CLASSIFICATION | Biological Sciences | BIOSPHERE | Biotic taxonomic identification | COMMUNITY DYNAMICS | CRUSTACEANS | Centrostephanus rodgersii | Coverage of algal species or guilds | Coverage of substratum types | Coverage of urchin barren | EARTH SCIENCE | ECHINODERMS | Ecological Applications | ECOLOGICAL DYNAMICS | Ecology | Environmental Sciences | Ecological Impacts of Climate Change | FISHERIES | Haliotis rubra | Heliocidaris erythrogramma | Jasus edwardsii | MOLLUSKS | Marine and Estuarine Ecology (Incl. Marine Ichthyology) | RANGE CHANGES | REEF HABITAT | SEA URCHINS | SPECIES COMPETITION | SPECIES/POPULATION INTERACTIONS | Temperate Reef | biota | diver |

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Other Information
(DATA ACCESS V1 - Barren versus kelp bed biodiversity data [database CSV format])

url : https://geoserver.imas.utas.edu.au/geoserver/wfs?version=1.0.0&request=GetFeature&typeName=imas:FR1_CRJohnson_Barren_kelpbed_comparison_rock_lobster_abalone_abundance_GV&outputFormat=csv

(DATA ACCESS V2 [original .xsl spreadsheet format])

url : https://data.imas.utas.edu.au/attachments/679ceb60-0aad-11dd-bf15-00188b4c0af8/Barren_kelpbed_comparison_dive_data_____FRDC_2001_044_a.xls

(SUPPLEMENTARY INFO - Key to variable codes as listed in data file [direct download])

url : https://data.imas.utas.edu.au/attachments/679ceb60-0aad-11dd-bf15-00188b4c0af8/species_codes_FRDC_2001_044.xls

MAP - survey sites for assessment of sea urchin grazing impacts (imas:FR1_CRJohnson_Barren_kelpbed_comparison_rock_lobster_abalone_abundance_GV)

url : https://geoserver.imas.utas.edu.au/geoserver/wms

This OCG WFS service returns the data for download in subsettable CSV format. (imas:FR1_CRJohnson_Barren_kelpbed_comparison_rock_lobster_abalone_abundance_GV)

url : https://geoserver.imas.utas.edu.au/geoserver/wfs

(View and download this data through the interactive IMAS Data Portal.)

url : https://data.imas.utas.edu.au/portal/search?uuid=679ceb60-0aad-11dd-bf15-00188b4c0af8

Identifiers
  • global : 679ceb60-0aad-11dd-bf15-00188b4c0af8