Distribution of an alien aquatic snail in relation to flow variability, human activities and water quality

Schreiber, E. S. G., Quinn, Gerald and Lake, P. S. 2003, Distribution of an alien aquatic snail in relation to flow variability, human activities and water quality, Freshwater biology, vol. 48, no. 6, pp. 951-961, doi: 10.1046/j.1365-2427.2003.01070.x.

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Title Distribution of an alien aquatic snail in relation to flow variability, human activities and water quality
Author(s) Schreiber, E. S. G.
Quinn, GeraldORCID iD for Quinn, Gerald orcid.org/0000-0003-4144-0355
Lake, P. S.
Journal name Freshwater biology
Volume number 48
Issue number 6
Start page 951
End page 961
Publisher Blackwell Scientific Publications
Place of publication Oxford, England
Publication date 2003-06
ISSN 0046-5070
Keyword(s) biological invasion
comparative sampling
logistic regression
Summary 1. Disturbance and anthropogenic land use changes are usually considered to be key factors facilitating biological invasions. However, specific comparisons of invasion success between sites affected to different degrees by these factors are rare.

2. In this study we related the large-scale distribution of the invading New Zealand mud snail (Potamopyrgus antipodarum) in southern Victorian streams, Australia, to anthropogenic land use, flow variability, water quality and distance from the site to the sea along the stream channel.

3. The presence of P. antipodarum was positively related to an index of flow-driven disturbance, the coefficient of variability of mean daily flows for the year prior to the study.

4. Furthermore, we found that the invader was more likely to occur at sites with multiple land uses in the catchment, in the forms of grazing, forestry and anthropogenic developments (e.g. towns and dams), compared with sites with low-impact activities in the catchment. However, this relationship was confounded by a higher likelihood of finding this snail in lowland sites close to the sea.

5. We conclude that P. antipodarum could potentially be found worldwide at sites with similar ecological characteristics. We hypothesise that its success as an invader may be related to an ability to quickly re-colonise denuded areas and that population abundances may respond to increased food resources. Disturbances could facilitate this invader by creating spaces for colonisation (e.g. a possible consequence of floods) or changing resource levels (e.g. increased nutrient levels in streams with intense human land use in their catchments).
Language eng
DOI 10.1046/j.1365-2427.2003.01070.x
Field of Research 060204 Freshwater Ecology
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2003, Blackwell Publishing Ltd.
Persistent URL http://hdl.handle.net/10536/DRO/DU:30006625

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