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Temperature influences species interactions between a native and a globally invasive freshwater snail

Sardiña, Paula, Beringer, Jason, Roche, Dylan and Thompson, Ross M. 2015, Temperature influences species interactions between a native and a globally invasive freshwater snail, Freshwater science, vol. 34, no. 3, pp. 933-941, doi: 10.1086/681639.

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Title Temperature influences species interactions between a native and a globally invasive freshwater snail
Author(s) Sardiña, Paula
Beringer, Jason
Roche, Dylan
Thompson, Ross M.
Journal name Freshwater science
Volume number 34
Issue number 3
Start page 933
End page 941
Total pages 9
Publisher University of Chicago Press
Place of publication Chicago, Ill.
Publication date 2015-09
ISSN 2161-9565
Keyword(s) invasion
competition
climate change
Potamopyrgus antipodarum
down-scaled models
Austropyrgus angasi
Science & Technology
Life Sciences & Biomedicine
Ecology
Marine & Freshwater Biology
Environmental Sciences & Ecology
Summary We experimentally assessed the interaction between a globally invasive snail (Potamopyrgus antipodarum) and an Australian native snail (Austropyrgus angasi) under temperatures based on current (1990-2000, mean = 17.94-19.02°C) and future (2100, mean = 19.42-21.65°C) predicted conditions. Temperature treatments were scenarios identified from down-scaled global circulation models. Growth rates (mm/d) for juveniles and adults were measured at low (1000 individuals [ind]/m2) and high (20,000 ind/m2) densities in intraspecific and interspecific interaction trials under the 2 temperature regimes. Juveniles of both species grew at similar rates regardless of temperature and density. On the other hand, adults had dissimilar growth rates among treatments. Under current temperatures, P. antipodarum adults grew significantly faster than A. angasi adults when both species were kept at high densities in the interspecific treatment (interspecific-high) and faster than when they were kept at high densities but with conspecifics in the intraspecific treatment (intraspecific-high). However, we did not detect intra- or interspecific competition effects on either species. Thus, our results suggest that under current conditions, P. antipodarum gained from foraging with A. angasi (unidirectional facilitation effect). Under 2100 temperatures, the facilitative effect of A. angasi on P. antipodarum growth was not apparent, a result suggesting that the facilitation was directly related to the temperature conditions. Our research shows the importance of considering future temperature conditions as a factor that could alter species interactions and potentially influence the ecological effects of invasive species.
Language eng
DOI 10.1086/681639
Field of Research 050101 Ecological Impacts of Climate Change
050103 Invasive Species Ecology
Socio Economic Objective 970105 Expanding Knowledge in the Environmental Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2015, The Society for Freshwater Science
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084905

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