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Riverine macroinvertebrate assemblages up to 8 years

Becker, Alistair and Robson, Belinda J 2009, Riverine macroinvertebrate assemblages up to 8 years, Marine and freshwater research, vol. 60, no. 12, pp. 1309-1316, doi: 10.1071/MF08350.

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Title Riverine macroinvertebrate assemblages up to 8 years
Author(s) Becker, Alistair
Robson, Belinda J
Journal name Marine and freshwater research
Volume number 60
Issue number 12
Start page 1309
End page 1316
Publisher CSIRO Publishing
Place of publication Collingwood, Vic.
Publication date 2009
ISSN 1323-1650
1448-6059
Keyword(s) disturbance
multivariate dispersion,
recovery
revegetation
Salix spp
willow removal
Summary Willow removal followed by riparian revegetation is a widespread river restoration practice in Australia, but the ecological response to this has rarely been evaluated. We sampled river macroinvertebrates from six sites each of three riparian vegetation types: revegetated (treatment), willow-dominated (control) and native forest (reference) in the Gellibrand River catchment during austral spring 2007 and autumn 2008, and measured temperature and light intensity. Revegetated sites varied in age from 1 to 8 years since restoration. Abundances of invertebrates were similar across vegetation types, but were higher during autumn. Macroinvertebrate assemblages at revegetated sites (regardless of age) and at willow-dominated sites showed little among-site variation compared with native forest sites,which showed high site-to-site variability. Water temperatures and light intensity were higher at revegetated sites where works had recently been completed and cooler in native forest sites and long-established revegetated sites. The reduced variability in macroinvertebrate communities among revegetated sites may result from their history as willow-dominated sites or from the disturbance created by willow removal. Either way, these results suggest that longer than 8 years is required before macroinvertebrate assemblages in restored stretches of stream show the variation that appears characteristic of natural sites.
Language eng
DOI 10.1071/MF08350
Field of Research 050207 Environmental Rehabilitation (excl Bioremediation)
Socio Economic Objective 960905 Farmland, Arable Cropland and Permanent Cropland Water Management
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2009, CSIRO
Persistent URL http://hdl.handle.net/10536/DRO/DU:30023719

Document type: Journal Article
Collection: School of Life and Environmental Sciences
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