Leschenault Estuary Seagrass Survey - Extent (DWER-106)

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'


Tags: Biota, Estuary, Flora, Seagrass
Organization: Department of Water and Environmental Regulation