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Why life history information matters: drought refuges and macroinvertebrate persistence in non-perennial streams subject to a drier climate

Robson, B.J., Chester, E.T. and Austin, C.M. 2011, Why life history information matters: drought refuges and macroinvertebrate persistence in non-perennial streams subject to a drier climate, Marine and freshwater research, vol. 62, no. 7, pp. 801-810, doi: 10.1071/MF10062.

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Title Why life history information matters: drought refuges and macroinvertebrate persistence in non-perennial streams subject to a drier climate
Author(s) Robson, B.J.
Chester, E.T.
Austin, C.M.
Journal name Marine and freshwater research
Volume number 62
Issue number 7
Start page 801
End page 810
Total pages 10
Publisher CSIRO
Place of publication CLayton, Vic.
Publication date 2011-07-25
ISSN 1323-1650
Keyword(s) climate change
dryland rivers
environmental flows
environmental water allocation
intermittent streams
landscape genetics
species traits
Summary In some arid, semi-arid or Mediterranean climate regions, increased water extraction combined with climate change will prolong periods of drought in non-perennial streams, but the effects on macroinvertebrate populations are poorly understood. Drought refuges allow species to survive drying but their use depends on species' traits, and refuge availability depends on landscape structure. This review evaluates the utility of existing ecological concepts for predicting the role of drought refuges for sustaining biodiversity in non-perennial streams. We also suggest traits that may determine invertebrate species' resistance or resilience to prolonged drying. Parts of the likely responses by populations to increased stream drying are described by existing ecological concepts, such as the biological traits of species and their interaction with the habitat templet, barriers to dispersal and metapopulation dynamics, the use of drought refuges, habitat fragmentation and population and landscape genetics. However, the limited knowledge of invertebrate life histories in non-perennial streams restricts our ability to use these concepts in a predictive manner. In particular, reach or pool occupancy by species cannot be accurately predicted, but such predictions are necessary for evaluating potential management actions such as the use of environmental flows to sustain drought refuges during dry periods.
Language eng
DOI 10.1071/MF10062
Field of Research 050101 Ecological Impacts of Climate Change
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 ©2011, CSIRO
Persistent URL http://hdl.handle.net/10536/DRO/DU:30091345

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