Growns, Ivor

Tsoi, Iris Wing

Southwell, Mark

Mika, Sarah

Lewis, Sam

Vincent, Ben

2021-10-01

<p>Increased need for freshwater for human uses from the mid-1900s has severely impacted rivers and floodplain wetlands so that they are some of the most seriously degraded environments in the world. Research and monitoring in this area to date has focused on understanding 'flow-ecology' relationships, without investigating the mechanisms underlying them. The use of species traits offers a tool for defining mechanistic connections between biotic responses and environmental conditions. We examined nine macroinvertebrate trait categories in both wetlands and channels to determine whether their profiles responded to hydrology in the Gwydir River system in the northern Murray-Darling Basin, Australia. Trait responses were shown for the wetlands but not the river channels. Twelve traits showed positive relationships with the time the wetlands were connected to their river channels. It is unclear the reason(s) why the river channel invertebrate traits did not respond to hydrology. However, the use of environmental flows in the river systems may be important to other aspects of macroinvertebrate assemblages such as their role in food webs to support higher-order consumers.</p>

Aquatic Ecosystem Health & Management, 24(4), p. 93-102

1539-4077

1463-4988

https://hdl.handle.net/1959.11/60844

en

Michigan State University Press

The effects of hydrology on macroinvertebrate traits in river channel and wetland habitats

Journal Article

Publication