From Western Australia Government
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Oyster Harbour Seagrass Survey - Extent (DWER-107)

Created 05/05/2025

Updated 13/05/2025

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Oyster Harbour was surveyed in March 2019 and January 2021. Seagrass species distribution (Posidonia australis and Posidonia sinuousa) and cover (as percentage cover classes: 0, <15%, 15-45%, 45-75%, >75%) was recorded across 208-216 observations points across the estuary. The type of meadow (continuous or patchy), epiphytic cover on seagrass (as none, very low, low, medium, high or very high), and macroalgae cover (as percentage cover in categories: 0, <15%, 15-45%, 45-75%, >75%) were recorded at each site. At approximately a third of the sites, physical water profiles, secchi depth and euphotic depth were recorded. The datasets making up the seagrass survey data are: Oyster_Seagrass - point dataset Oyster_Seagrass_Extent - polygon showing presence/absence Oyster_Seagrass_Cover - polygon showing % cover Layers: Oyster_Seagrass_Mar_2019 - Oyster_seagrass points where Year = '2019' Oyster_Seagrass_Jan_2021 - Oyster_seagrass points where Year = '2021'

Oyster_Seagrass_Extent_Mar_2019 - Oyster_seagrass_Extent where Year = '2019' OR PERCCOVER = 'Licensed aquacture site - DPIRD - not surveyed' Oyster_Seagrass_Extent_Jan_2021 - Oyster_seagrass_Extent where Year = '2021' OR PERCCOVER = 'Licensed aquacture site - DPIRD - not surveyed'

Oyster_Seagrass_Cover_Mar_2019 - Oyster_seagrass_cover points where Year = '2019' OR PERCCOVER = 'Licensed aquacture site - DPIRD - not surveyed' Oyster_Seagrass_Cover_Jan_2021 - Oyster_seagrass_cover points where Year = '2021' OR PERCCOVER = 'Licensed aquacture site - DPIRD - not surveyed'

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Title Oyster Harbour Seagrass Survey - Extent (DWER-107)
Language English
Licence custom_active_acceptance
Landing Page https://devweb.dga.links.com.au/data/dataset/13d8f019-f469-41bb-a6d7-7ea9d0ab154b
Contact Point
Department of Planning (Western Australia)
corporate@planning.wa.gov.au
Geospatial Coverage http://www.ga.gov.au/place-names/PlaceDetails.jsp?fctext=RESV&fctext=POPL&fctext=STAT&submit1=GA7
Data Portal data.gov.au