Aquatic plants are critical to the Vasse Wonnerup wetlands providing food and habitat, oxygenating the water, using nutrients, and stabilising sediments. Aquatic plants including macrophytes (seagrasses and submerged plants) and macroalgae (seaweeds and filamentous algae) were monitored in spring across four regions in the wetlands. Percentage Volume Index (PVI) of key species and ratio of macrophytes to macroalgae were used to develop indicators for each region following methodology developed by Murdoch University.
58%
16%
54%
15%
12%
43%
9%
43%
26%
4%
1 Plant = 1-10% Mean PVI
Spring | Upper Vasse | Lower Vasse | Lower Wonnerup | Upper Wonnerup | Download Reports |
---|---|---|---|---|---|
2022 | B | B | B | B | Download Report |
2021 | B | C | B | C | Download Report |
2020 | D | D | B | B | |
2019 | C | C | B | B | |
2018 | B | C | B | B | |
2017 | C | E | C | C |
A
Excellent
B
Very Good
C
Fair
D
Poor
E
Very Poor
Photo credit: Jane Chambers