Aquatic flora surveys of the Hardy Inlet were conducted from the top of Molloy Island and the Scott River Basin to the mouth of the Inlet. Surveys were initially conducted in 2008 by Murdoch University’s Marine and Freshwater Research Laboratory (MAFRL) and forms part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. Surveys were conducted again in 2018, 2020 & 2023 by the Department of Water and Environmental Regulation as "Hardy Inlet Seagrass Survey". The datasets making up the 2008 Hardy Inlet seagrass survey data are: WA_MAFRL_Hardy_seagrass_polygons - polygon dataset showing interpolated percentage cover of Ruppia spp. This record provides access to the initial MAFRL surveys. See associated DWER records in Data WA catalogue for access to newer surveys at this site.

This data is part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. Surveys were conducted by the WA Department of Water together with Geoscience Australia. The objective of these surveys was to collect baseline data on seagrass composition and distribution in key estuaries of southern and south-western WA. This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. The datasets making up the Walpole-Nornalup Inlet seagrass survey data are: WA_WalpNorn_SAV_sites - point dataset of species presence/absence and survey methodology at each site. WA_WalpNorn_SAV_polygons - polygon dataset showing interpolated percentage cover in polygons derived from site points.

This data is part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. Surveys were conducted by the WA Department of Water together with Geoscience Australia. The objective of these surveys was to collect baseline data on seagrass composition and distribution in key estuaries of southern and south-western WA. This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. The datasets making up the Beaufort Inlet seagrass survey data are: WA_Beaufort_SAV_sites - point dataset of species presence/absence and survey methodology at each site. WA_Beaufort_SAV_polygons - polygon dataset showing interpolated percentage cover in polygons derived from site points.

Repeat surveys of aquatic flora were conducted in Princess Royal Harbour in 1996, 2003, 2005 and 2006. This data is part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. Surveys were initially conducted by the WA Department of Water. The objectives of the study were to map the distribution of the different seagrass species found in Princess Royal Harbour and Oyster Harbour and to compare the distributions with that observed in previous studies (1996 and 2003). This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. Surveys were conducted again in January and March 2021 by the Department of Water and Environmental Regulation as "Princess Royal Harbour Seagrass Survey". The datasets making up the 1996-2006 Princess Royal Harbour seagrass survey data are: WA_PrincessRoyal_seagrass_polygons - polygon dataset showing interpolated percentage cover of seagrass. This record provides access to the initial WA DoW surveys. See associated DWER records in Data WA catalogue for access to newer surveys at this site.

Repeat surveys of aquatic flora were conducted in Oyster Harbour in 1988, 1996 and 2006. This data is part of the 2013 report "Synthesis of seagrass mapping studies" conducted by the Water Science Branch of the Department of Water. Surveys were initially conducted by the WA Department of Water. The objectives of the study were to map the distribution of the different seagrass species found in Princess Royal Harbour and Oyster Harbour and to compare the distributions with that observed in previous studies (1988 and 1996). This data was acquired by the ACEAS Seagrass Group as part of the 2013 Australia-wide risk assessment of Seagrass. Surveys were conducted again in March 2019 and January 2021 by the Department of Water and Environmental Regulation as "Oyster Harbour Seagrass Survey". The datasets making up the 1988-2006 Oyster Harbour seagrass survey data are: WA_Oyster_seagrass_polygons - polygon dataset showing interpolated percentage cover of seagrass (all species combined for 1988 & 1997 surveys, with species information for 2006 survey). This record provides access to the initial WA DoW surveys. See associated DWER records in Data WA catalogue for access to newer surveys at this site.

Leschenault Estuary was surveyed in April 2009, February 2015, February and March 2016, February 2017, February and March 2018, February 2019, February and March 2020, February 2021, February and March 2022, and February and March 2023. Seagrass species distribution and cover (as percentage cover in categories: 0, 0-10%, 10-25%, 25-50%, 50-75%, 75-90%, 90-100%), epiphytic cover (as none, low, medium or high) and macroalgae cover (as percentage cover in categories: 0, 0-10%, 10-25%, 25-50%, 50-75%, 75-90%, 90-100%) were recorded at each site. At approximately a third of the sites, physical water profiles, secchi depth and photosynthetically active radiation (euphotic depth) were conducted from 2018 onwards. When observation locations were inaccessible by boat, sites were accessed from kayaks paired with drone imagery which was used to make observations. The datasets making up the Leschenault seagrass survey data are: Leschenault_Seagrass - point dataset Leschenault_Seagass_Extent - polygon showing presence/absence derived from points Leschenault_Seagrass_Cover -polygon showing percentage cover derived from points Layers: Leschenault_Seagrass_Apr_2009 - Leschenault_Seagrass points where Year = '2009' Leschenault_Seagrass_Feb_2015 - Leschenault_Seagrass points where Year = '2015' Leschenault_Seagrass_Feb_2016 - Leschenault_Seagrass points where Year = '2016' Leschenault_Seagrass_Feb_2017 - Leschenault_Seagrass points where Year = '2017' Leschenault_Seagrass_Feb_2018 - Leschenault_Seagrass points where Year = '2018' Leschenault_Seagrass_Feb_2019 - Leschenault_Seagrass points where Year = '2019' Leschenault_Seagrass_Feb_2020 - Leschenault_Seagrass points where Year = '2020' Leschenault_Seagrass_Feb_2021 - Leschenault_Seagrass points where Year = '2021' Leschenault_Seagrass_Feb_2022 - Leschenault_Seagrass points where Year = '2022' Leschenault_Seagrass_Feb_2023 - Leschenault_Seagrass points where Year = '2023' Leschenault_Seagrass_Extent_Apr_2009 - Leschenault_Seagrass_Extent where Year = '2009' Leschenault_Seagrass_Extent_Feb_2015 - Leschenault_Seagrass_Extent where Year = '2015' Leschenault_Seagrass_Extent_Feb_2016 - Leschenault_Seagrass_Extent where Year = '2016' Leschenault_Seagrass_Extent_Feb_2017 - Leschenault_Seagrass_Extent where Year = '2017' Leschenault_Seagrass_Extent_Feb_2018 - Leschenault_Seagrass_Extent where Year = '2018' Leschenault_Seagrass_Extent_Feb_2019 - Leschenault_Seagrass_Extent where Year = '2019' Leschenault_Seagrass_Extent_Feb_2020 - Leschenault_Seagrass_Extent where Year = '2020' Leschenault_Seagrass_Extent_Feb_2021 - Leschenault_Seagrass_Extent where Year = '2021' Leschenault_Seagrass_Extent_Feb_2022 - Leschenault_Seagrass_Extent where Year = '2022' Leschenault_Seagrass_Extent_Feb_2023 - Leschenault_Seagrass_Extent where Year = '2023' Leschenault_Seagrass_Cover_Apr_2009 - Leschenault_Seagrass_Cover where Year = '2009' Leschenault_Seagrass_Cover_Feb_2015 - Leschenault_Seagrass_Cover where Year = '2015' Leschenault_Seagrass_Cover_Feb_2016 - Leschenault_Seagrass_Cover where Year = '2016' Leschenault_Seagrass_Cover_Feb_2017 - Leschenault_Seagrass_Cover where Year = '2017' Leschenault_Seagrass_Cover_Feb_2018 - Leschenault_Seagrass_Cover where Year = '2018' Leschenault_Seagrass_Cover_Feb_2019 - Leschenault_Seagrass_Cover where Year = '2019' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2020' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2021' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2022' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2023'

Leschenault Estuary was surveyed in April 2009, February 2015, February and March 2016, February 2017, February and March 2018, February 2019, February and March 2020, February 2021, February and March 2022, and February and March 2023. Seagrass species distribution and cover (as percentage cover in categories: 0, 0-10%, 10-25%, 25-50%, 50-75%, 75-90%, 90-100%), epiphytic cover (as none, low, medium or high) and macroalgae cover (as percentage cover in categories: 0, 0-10%, 10-25%, 25-50%, 50-75%, 75-90%, 90-100%) were recorded at each site. At approximately a third of the sites, physical water profiles, secchi depth and photosynthetically active radiation (euphotic depth) were conducted from 2018 onwards. When observation locations were inaccessible by boat, sites were accessed from kayaks paired with drone imagery which was used to make observations. The datasets making up the Leschenault seagrass survey data are: Leschenault_Seagrass - point dataset Leschenault_Seagass_Extent - polygon showing presence/absence derived from points Leschenault_Seagrass_Cover -polygon showing percentage cover derived from points Layers: Leschenault_Seagrass_Apr_2009 - Leschenault_Seagrass points where Year = '2009' Leschenault_Seagrass_Feb_2015 - Leschenault_Seagrass points where Year = '2015' Leschenault_Seagrass_Feb_2016 - Leschenault_Seagrass points where Year = '2016' Leschenault_Seagrass_Feb_2017 - Leschenault_Seagrass points where Year = '2017' Leschenault_Seagrass_Feb_2018 - Leschenault_Seagrass points where Year = '2018' Leschenault_Seagrass_Feb_2019 - Leschenault_Seagrass points where Year = '2019' Leschenault_Seagrass_Feb_2020 - Leschenault_Seagrass points where Year = '2020' Leschenault_Seagrass_Feb_2021 - Leschenault_Seagrass points where Year = '2021' Leschenault_Seagrass_Feb_2022 - Leschenault_Seagrass points where Year = '2022' Leschenault_Seagrass_Feb_2023 - Leschenault_Seagrass points where Year = '2023' Leschenault_Seagrass_Extent_Apr_2009 - Leschenault_Seagrass_Extent where Year = '2009' Leschenault_Seagrass_Extent_Feb_2015 - Leschenault_Seagrass_Extent where Year = '2015' Leschenault_Seagrass_Extent_Feb_2016 - Leschenault_Seagrass_Extent where Year = '2016' Leschenault_Seagrass_Extent_Feb_2017 - Leschenault_Seagrass_Extent where Year = '2017' Leschenault_Seagrass_Extent_Feb_2018 - Leschenault_Seagrass_Extent where Year = '2018' Leschenault_Seagrass_Extent_Feb_2019 - Leschenault_Seagrass_Extent where Year = '2019' Leschenault_Seagrass_Extent_Feb_2020 - Leschenault_Seagrass_Extent where Year = '2020' Leschenault_Seagrass_Extent_Feb_2021 - Leschenault_Seagrass_Extent where Year = '2021' Leschenault_Seagrass_Extent_Feb_2022 - Leschenault_Seagrass_Extent where Year = '2022' Leschenault_Seagrass_Extent_Feb_2023 - Leschenault_Seagrass_Extent where Year = '2023' Leschenault_Seagrass_Cover_Apr_2009 - Leschenault_Seagrass_Cover where Year = '2009' Leschenault_Seagrass_Cover_Feb_2015 - Leschenault_Seagrass_Cover where Year = '2015' Leschenault_Seagrass_Cover_Feb_2016 - Leschenault_Seagrass_Cover where Year = '2016' Leschenault_Seagrass_Cover_Feb_2017 - Leschenault_Seagrass_Cover where Year = '2017' Leschenault_Seagrass_Cover_Feb_2018 - Leschenault_Seagrass_Cover where Year = '2018' Leschenault_Seagrass_Cover_Feb_2019 - Leschenault_Seagrass_Cover where Year = '2019' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2020' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2021' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2022' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2023'

Leschenault Estuary was surveyed in April 2009, February 2015, February and March 2016, February 2017, February and March 2018, February 2019, February and March 2020, February 2021, February and March 2022, and February and March 2023. Seagrass species distribution and cover (as percentage cover in categories: 0, 0-10%, 10-25%, 25-50%, 50-75%, 75-90%, 90-100%), epiphytic cover (as none, low, medium or high) and macroalgae cover (as percentage cover in categories: 0, 0-10%, 10-25%, 25-50%, 50-75%, 75-90%, 90-100%) were recorded at each site. At approximately a third of the sites, physical water profiles, secchi depth and photosynthetically active radiation (euphotic depth) were conducted from 2018 onwards. When observation locations were inaccessible by boat, sites were accessed from kayaks paired with drone imagery which was used to make observations. The datasets making up the Leschenault seagrass survey data are: Leschenault_Seagrass - point dataset Leschenault_Seagass_Extent - polygon showing presence/absence derived from points Leschenault_Seagrass_Cover -polygon showing percentage cover derived from points Layers: Leschenault_Seagrass_Apr_2009 - Leschenault_Seagrass points where Year = '2009' Leschenault_Seagrass_Feb_2015 - Leschenault_Seagrass points where Year = '2015' Leschenault_Seagrass_Feb_2016 - Leschenault_Seagrass points where Year = '2016' Leschenault_Seagrass_Feb_2017 - Leschenault_Seagrass points where Year = '2017' Leschenault_Seagrass_Feb_2018 - Leschenault_Seagrass points where Year = '2018' Leschenault_Seagrass_Feb_2019 - Leschenault_Seagrass points where Year = '2019' Leschenault_Seagrass_Feb_2020 - Leschenault_Seagrass points where Year = '2020' Leschenault_Seagrass_Feb_2021 - Leschenault_Seagrass points where Year = '2021' Leschenault_Seagrass_Feb_2022 - Leschenault_Seagrass points where Year = '2022' Leschenault_Seagrass_Feb_2023 - Leschenault_Seagrass points where Year = '2023' Leschenault_Seagrass_Extent_Apr_2009 - Leschenault_Seagrass_Extent where Year = '2009' Leschenault_Seagrass_Extent_Feb_2015 - Leschenault_Seagrass_Extent where Year = '2015' Leschenault_Seagrass_Extent_Feb_2016 - Leschenault_Seagrass_Extent where Year = '2016' Leschenault_Seagrass_Extent_Feb_2017 - Leschenault_Seagrass_Extent where Year = '2017' Leschenault_Seagrass_Extent_Feb_2018 - Leschenault_Seagrass_Extent where Year = '2018' Leschenault_Seagrass_Extent_Feb_2019 - Leschenault_Seagrass_Extent where Year = '2019' Leschenault_Seagrass_Extent_Feb_2020 - Leschenault_Seagrass_Extent where Year = '2020' Leschenault_Seagrass_Extent_Feb_2021 - Leschenault_Seagrass_Extent where Year = '2021' Leschenault_Seagrass_Extent_Feb_2022 - Leschenault_Seagrass_Extent where Year = '2022' Leschenault_Seagrass_Extent_Feb_2023 - Leschenault_Seagrass_Extent where Year = '2023' Leschenault_Seagrass_Cover_Apr_2009 - Leschenault_Seagrass_Cover where Year = '2009' Leschenault_Seagrass_Cover_Feb_2015 - Leschenault_Seagrass_Cover where Year = '2015' Leschenault_Seagrass_Cover_Feb_2016 - Leschenault_Seagrass_Cover where Year = '2016' Leschenault_Seagrass_Cover_Feb_2017 - Leschenault_Seagrass_Cover where Year = '2017' Leschenault_Seagrass_Cover_Feb_2018 - Leschenault_Seagrass_Cover where Year = '2018' Leschenault_Seagrass_Cover_Feb_2019 - Leschenault_Seagrass_Cover where Year = '2019' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2020' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2021' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2022' Leschenault_Seagrass_Cover_Feb_2020 - Leschenault_Seagrass_Cover where Year = '2023'