Biomass and productivity of seagrass communities in Exmouth Gulf, Western Australia
In August/September 1995, visual surveys of seagrass abundance were undertaken along 47 transects, located along the eastern and western coasts of Exmouth Gulf. Transects extended from the shoreward to the seaward border of the zone vegetated with macrophytes. Spot checks were made at approximately...
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ftands:oai:ands.org.au::1925292 2023-09-05T13:23:41+02:00 Biomass and productivity of seagrass communities in Exmouth Gulf, Western Australia Australian Institute of Marine Science (isOwnedBy) Spatial: 114.083333,-22.416667 114.583333,-22.416667 114.583333,-21.916667 114.083333,-21.916667 114.083333,-22.416667 Spatial: true https://researchdata.edu.au/biomass-productivity-seagrass-western-australia/1925292 http://data.gov.au/dataset/b3e6dc9d-9e08-4d9c-9c82-cba816adb92c unknown data.gov.au https://researchdata.edu.au/biomass-productivity-seagrass-western-australia/1925292 http://data.gov.au/dataset/b3e6dc9d-9e08-4d9c-9c82-cba816adb92c biomass-and-productivity-of-seagrass-communities-in-exmouth-gulf-western-australia Australian Institute of Marine Science Aquatic Ecosystems Benthic Habitat Biological Classification Biomass Biosphere Carbon Cymodocea angustata Cymodocea serrulata Ecological Dynamics Growth Halodule uninervis Halophila ovalis Nitrogen Plants Syringodium isoetifolium Thalassodendron ciliatum Vegetation dataset ftands 2023-08-14T22:52:00Z In August/September 1995, visual surveys of seagrass abundance were undertaken along 47 transects, located along the eastern and western coasts of Exmouth Gulf. Transects extended from the shoreward to the seaward border of the zone vegetated with macrophytes. Spot checks were made at approximately every 10m to 20m along each transect and the percent cover and type of vegetation (identified to genus, where possible) were recorded. When there was taxonomic uncertainty, voucher specimens were taken for later identification.\n\nDestructive sampling was carried out along transects at three sites: Tent Island (2 transects), Simpson Island (2 transects) and Exmouth Town (3 transects). Five or ten 0.25m² quadrats were randomly placed along each 50m transect. Quadrats were photographed, the percent cover of macrophytes was estimated and the density of seagrass was measured. From each site, the species composition of 5 Cymodocea samples was quantified.\n\nAll biomass was removed from each quadrat including seagrass roots and rhizomes to a depth of 20cm. Below ground material from Thalassodendron ciliatum was not collected. After drying samples for 48 hours at 70°C, epiphytes were removed and the remaining sample was ashed for 18 hours at 450°C and the dry weight determined. Subsamples were analysed for total carbon and nitrogen.\n\nAt the three sites, all distal shoots of Cymodocea serrulata occurring along a 20m transect were tagged and at Exmouth, 25 shoots of Thalassodendron ciliatum were also tagged. After 6, 12 or 16 days (depending on the site), complete shoots were collected, measured and divided into new and old parts of leaves. The material was then dried and analysed for carbon and nitrogen content. Point of truth URL of this metadata record - http://gcmd.nasa.gov/Resources/valids/archives/keyword_list.html - Dataset Tent Island Research Data Australia (Australian National Data Service - ANDS) Tent Island ENVELOPE(166.383,166.383,-77.683,-77.683) |
institution |
Open Polar |
collection |
Research Data Australia (Australian National Data Service - ANDS) |
op_collection_id |
ftands |
language |
unknown |
topic |
Aquatic Ecosystems Benthic Habitat Biological Classification Biomass Biosphere Carbon Cymodocea angustata Cymodocea serrulata Ecological Dynamics Growth Halodule uninervis Halophila ovalis Nitrogen Plants Syringodium isoetifolium Thalassodendron ciliatum Vegetation |
spellingShingle |
Aquatic Ecosystems Benthic Habitat Biological Classification Biomass Biosphere Carbon Cymodocea angustata Cymodocea serrulata Ecological Dynamics Growth Halodule uninervis Halophila ovalis Nitrogen Plants Syringodium isoetifolium Thalassodendron ciliatum Vegetation Biomass and productivity of seagrass communities in Exmouth Gulf, Western Australia |
topic_facet |
Aquatic Ecosystems Benthic Habitat Biological Classification Biomass Biosphere Carbon Cymodocea angustata Cymodocea serrulata Ecological Dynamics Growth Halodule uninervis Halophila ovalis Nitrogen Plants Syringodium isoetifolium Thalassodendron ciliatum Vegetation |
description |
In August/September 1995, visual surveys of seagrass abundance were undertaken along 47 transects, located along the eastern and western coasts of Exmouth Gulf. Transects extended from the shoreward to the seaward border of the zone vegetated with macrophytes. Spot checks were made at approximately every 10m to 20m along each transect and the percent cover and type of vegetation (identified to genus, where possible) were recorded. When there was taxonomic uncertainty, voucher specimens were taken for later identification.\n\nDestructive sampling was carried out along transects at three sites: Tent Island (2 transects), Simpson Island (2 transects) and Exmouth Town (3 transects). Five or ten 0.25m² quadrats were randomly placed along each 50m transect. Quadrats were photographed, the percent cover of macrophytes was estimated and the density of seagrass was measured. From each site, the species composition of 5 Cymodocea samples was quantified.\n\nAll biomass was removed from each quadrat including seagrass roots and rhizomes to a depth of 20cm. Below ground material from Thalassodendron ciliatum was not collected. After drying samples for 48 hours at 70°C, epiphytes were removed and the remaining sample was ashed for 18 hours at 450°C and the dry weight determined. Subsamples were analysed for total carbon and nitrogen.\n\nAt the three sites, all distal shoots of Cymodocea serrulata occurring along a 20m transect were tagged and at Exmouth, 25 shoots of Thalassodendron ciliatum were also tagged. After 6, 12 or 16 days (depending on the site), complete shoots were collected, measured and divided into new and old parts of leaves. The material was then dried and analysed for carbon and nitrogen content. Point of truth URL of this metadata record - http://gcmd.nasa.gov/Resources/valids/archives/keyword_list.html - |
author2 |
Australian Institute of Marine Science (isOwnedBy) |
format |
Dataset |
title |
Biomass and productivity of seagrass communities in Exmouth Gulf, Western Australia |
title_short |
Biomass and productivity of seagrass communities in Exmouth Gulf, Western Australia |
title_full |
Biomass and productivity of seagrass communities in Exmouth Gulf, Western Australia |
title_fullStr |
Biomass and productivity of seagrass communities in Exmouth Gulf, Western Australia |
title_full_unstemmed |
Biomass and productivity of seagrass communities in Exmouth Gulf, Western Australia |
title_sort |
biomass and productivity of seagrass communities in exmouth gulf, western australia |
publisher |
data.gov.au |
url |
https://researchdata.edu.au/biomass-productivity-seagrass-western-australia/1925292 http://data.gov.au/dataset/b3e6dc9d-9e08-4d9c-9c82-cba816adb92c |
op_coverage |
Spatial: 114.083333,-22.416667 114.583333,-22.416667 114.583333,-21.916667 114.083333,-21.916667 114.083333,-22.416667 Spatial: true |
long_lat |
ENVELOPE(166.383,166.383,-77.683,-77.683) |
geographic |
Tent Island |
geographic_facet |
Tent Island |
genre |
Tent Island |
genre_facet |
Tent Island |
op_source |
Australian Institute of Marine Science |
op_relation |
https://researchdata.edu.au/biomass-productivity-seagrass-western-australia/1925292 http://data.gov.au/dataset/b3e6dc9d-9e08-4d9c-9c82-cba816adb92c biomass-and-productivity-of-seagrass-communities-in-exmouth-gulf-western-australia |
_version_ |
1776204272992518144 |