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The influence of urbanisation on macroinvertebrate biodiversity in constructed stormwater wetlands

Mackintosh, Teresa J., Davis, Jenny A. and Thompson, Ross M. (2015). The influence of urbanisation on macroinvertebrate biodiversity in constructed stormwater wetlands. Science of the Total Environment,536(December):527-537.

Document type: Journal Article
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IRMA ID 81144320xPUB248
Title The influence of urbanisation on macroinvertebrate biodiversity in constructed stormwater wetlands
Author Mackintosh, Teresa J.
Davis, Jenny A.
Thompson, Ross M.
Journal Name Science of the Total Environment
Publication Date 2015
Volume Number 536
Issue Number December
ISSN 0048-9697   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-84938309892
Start Page 527
End Page 537
Total Pages 11
Place of Publication Netherlands
Publisher Elsevier BV
HERDC Category C1 - Journal Article (DIISR)
Abstract The construction of wetlands in urban environments is primarily carried out to assist in the removal of contaminants from wastewaters; however, these wetlands have the added benefit of providing habitat for aquatic invertebrates, fish and waterbirds. Stormwater quantity and quality is directly related to impervious area (roads, sealed areas, roofs) in the catchment. As a consequence, it would be expected that impervious area would be related to contaminant load and biodiversity in receiving waters such as urban wetlands. This study aimed to establish whether the degree of urbanisation and its associated changes to stormwater runoff affected macroinvertebrate richness and abundance within constructed wetlands. Urban wetlands in Melbourne's west and south east were sampled along a gradient of urbanisation. There was a significant negative relationship between total imperviousness (TI) and the abundance of aquatic invertebrates detected for sites in the west, but not in the south east. However macroinvertebrate communities were relatively homogenous both within and between all study wetlands. Chironomidae (non-biting midges) was the most abundant family recorded at the majority of sites. Chironomids are able to tolerate a wide array of environmental conditions, including eutrophic and anoxic conditions. Their prevalence suggests that water quality is impaired in these systems, regardless of degree of urbanisation, although the causal mechanism is unclear. These results show some dependency between receiving wetland condition and the degree of urbanisation of the catchment, but suggest that other factors may be as important in determining the value of urban wetlands as habitat for wildlife.
Keywords Constructed wetlands
Water quality
Wetland management
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