From Western Australia Government
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Princess Royal Harbour Seagrass Survey - Extent (DWER-132)

Created 23/06/2025

Updated 24/10/2025

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Princess Royal Harbour was surveyed in January and March 2021. Seagrass species distribution (Posidonia australis, Posidonia sinuousa, Posidonia coriacea, Halophila sp., Ruppia sp., and Amphibolis sp.) and cover (as percentage cover classes: 0, <15%, 15-45%, 45-75%, >75%) was recorded across 263 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 photosynthetically active radiation (euphotic depth) were recorded. When observation locations were inaccessible by boat, sites were accessed from kayaks to make observations. The datasets making up the seagrass survey data are: PrincessRoyal_Seagrass - point dataset PrincessRoyal_Seagrass_Extent - polygon showing presence/absence PrincessRoyal_Seagrass_Cover - polygon showing % cover Layers: PrincessRoyal_Seagrass_Jan_2021 - PrincessRoyal_seagrass points where Year = '2021'

PrincessRoyal_Seagrass_Extent_Jan_2021 - PrincessRoyal_seagrass_Extent where Year = '2021'

PrincessRoyal_Seagrass_Cover_Jan_2021 - PrincessRoyal_seagrass_cover points where Year = '2021'

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Additional Info

Field Value
Title Princess Royal Harbour Seagrass Survey - Extent (DWER-132)
Language English
Licence Not Specified
Landing Page https://data.gov.au/data/dataset/8659b46f-5ebc-4713-b013-7952c189c2bc
Remote Last Updated 16/10/2025
Contact Point
Department of Water and Environmental Regulation
spatial.data@dwer.wa.gov.au
Reference Period 29/02/2024
Geospatial Coverage
Map data © OpenStreetMap contributors
{
  "coordinates": [
    [
      [
        117.8485548650001,
        -35.08339537699993
      ],
      [
        117.92833231300006,
        -35.08339537699993
      ],
      [
        117.92833231300006,
        -35.027669215999936
      ],
      [
        117.8485548650001,
        -35.027669215999936
      ],
      [
        117.8485548650001,
        -35.08339537699993
      ]
    ]
  ],
  "type": "Polygon"
}
Data Portal Western Australia Government

Data Source

This dataset was originally found on Western Australia Government "Princess Royal Harbour Seagrass Survey - Extent (DWER-132)". Please visit the source to access the original metadata of the dataset:
https://catalogue.data.wa.gov.au/dataset/princess-royal-harbour-seagrass-survey-extent