Terrestrial invertebrates of dry river beds are not simply subsets of riparian assemblages
Identifieur interne : 006A70 ( Main/Merge ); précédent : 006A69; suivant : 006A71Terrestrial invertebrates of dry river beds are not simply subsets of riparian assemblages
Auteurs : Alisha L. Steward [Australie] ; Jonathan C. Marshall [Australie] ; Fran Sheldon [Australie] ; Bronwyn Harch [Australie] ; Satish Choy [Australie] ; Stuart E. Bunn [Australie] ; Klement Tockner [Allemagne]Source :
- Aquatic sciences [ 1015-1621 ] ; 2011.
Descripteurs français
- Pascal (Inist)
- Wicri :
- topic : Changement climatique, Sécheresse, Milieu aquatique.
English descriptors
- KwdEn :
Abstract
Dry river beds are common worldwide and are rapidly increasing in extent due to the effects of water management and prolonged drought periods due to climate change. While attention has been given to the responses of aquatic invertebrates to drying rivers, few studies exist on the terrestrial invertebrates colonizing dry river beds. Dry river beds are physically harsh and they often differ substantially in substrate, topography, microclimate and inundation frequency from adjacent riparian zones. Given these differences, we predicted that dry river beds provide a unique habitat for terrestrial invertebrates, and that their assemblage composition differs from that in adjacent riparian zones. Dry river beds and riparian zones in Australia and Italy were sampled for terrestrial invertebrates with pitfall traps. Sites differed in substrate type, climate and flow regime. Dry river beds contained diverse invertebrate assemblages and their composition was consistently different from adjacent riparian zones, irrespective of substrate, climate or hydrology. Although some taxa were shared between dry river beds and riparian zones, 66 of 320 taxa occurred only in dry river beds. Differences were due to species turnover, rather than shifts in abundance, indicating that dry river bed assemblages are not simply subsets of riparian assemblages. Some spatial patterns in invertebrate assemblages were associated with environmental variables (irrespective of habitat type), but these associations were statistically weak. We suggest that dry river beds are unique habitats in their own right. We discuss potential human stressors and management issues regarding dry river beds and provide recommendations for future research.
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Steward</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan</s1><s2>Brisbane, QLD 4111</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, QLD 4111</wicri:noRegion></affiliation></author><author><name sortKey="Marshall, Jonathan C" sort="Marshall, Jonathan C" uniqKey="Marshall J" first="Jonathan C." last="Marshall">Jonathan C. Marshall</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Queensland Department of Environment and Resource Management, Ecosciences Precinct, 41 Boggo Road, Dutton Park</s1><s2>Brisbane, QLD 4102</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, QLD 4102</wicri:noRegion></affiliation></author><author><name sortKey="Sheldon, Fran" sort="Sheldon, Fran" uniqKey="Sheldon F" first="Fran" last="Sheldon">Fran Sheldon</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan</s1><s2>Brisbane, QLD 4111</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, QLD 4111</wicri:noRegion></affiliation></author><author><name sortKey="Harch, Bronwyn" sort="Harch, Bronwyn" uniqKey="Harch B" first="Bronwyn" last="Harch">Bronwyn Harch</name><affiliation wicri:level="1"><inist:fA14 i1="03"><s1>CSIRO Mathematics, Informatics and Statistics, Ecosciences Precinct, 41 Boggo Road, Dutton Park</s1><s2>Brisbane, QLD 4102</s2><s3>AUS</s3><sZ>4 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, QLD 4102</wicri:noRegion></affiliation></author><author><name sortKey="Choy, Satish" sort="Choy, Satish" uniqKey="Choy S" first="Satish" last="Choy">Satish Choy</name><affiliation wicri:level="1"><inist:fA14 i1="02"><s1>Queensland Department of Environment and Resource Management, Ecosciences Precinct, 41 Boggo Road, Dutton Park</s1><s2>Brisbane, QLD 4102</s2><s3>AUS</s3><sZ>2 aut.</sZ><sZ>5 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, QLD 4102</wicri:noRegion></affiliation></author><author><name sortKey="Bunn, Stuart E" sort="Bunn, Stuart E" uniqKey="Bunn S" first="Stuart E." last="Bunn">Stuart E. Bunn</name><affiliation wicri:level="1"><inist:fA14 i1="01"><s1>Australian Rivers Institute, Griffith University, 170 Kessels Road, Nathan</s1><s2>Brisbane, QLD 4111</s2><s3>AUS</s3><sZ>1 aut.</sZ><sZ>3 aut.</sZ><sZ>6 aut.</sZ></inist:fA14><country>Australie</country><wicri:noRegion>Brisbane, QLD 4111</wicri:noRegion></affiliation></author><author><name sortKey="Tockner, Klement" sort="Tockner, Klement" uniqKey="Tockner K" first="Klement" last="Tockner">Klement Tockner</name><affiliation wicri:level="3"><inist:fA14 i1="04"><s1>Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), and Institute of Biology, Freie Universität Berlin, Mueggelseedamm 310</s1><s2>12587 Berlin</s2><s3>DEU</s3><sZ>7 aut.</sZ></inist:fA14><country>Allemagne</country><placeName><region type="land" nuts="3">Berlin</region><settlement type="city">Berlin</settlement></placeName></affiliation></author></analytic><series><title level="j" type="main">Aquatic sciences</title><title level="j" type="abbreviated">Aquat. sci.</title><idno type="ISSN">1015-1621</idno><imprint><date when="2011">2011</date></imprint></series></biblStruct></sourceDesc><seriesStmt><title level="j" type="main">Aquatic sciences</title><title level="j" type="abbreviated">Aquat. sci.</title><idno type="ISSN">1015-1621</idno></seriesStmt></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Aquatic environment</term><term>Climate change</term><term>Community</term><term>Community structure</term><term>Composition</term><term>Drought</term><term>Invertebrata</term><term>Riparian</term><term>Rivers</term><term>Stream</term><term>Temporary</term></keywords><keywords scheme="Pascal" xml:lang="fr"><term>Rivière</term><term>Cours eau</term><term>Ripicole</term><term>Communauté</term><term>Temporaire</term><term>Changement climatique</term><term>Sécheresse</term><term>Composition</term><term>Structure communauté</term><term>Milieu aquatique</term><term>Invertebrata</term></keywords><keywords scheme="Wicri" type="topic" xml:lang="fr"><term>Changement climatique</term><term>Sécheresse</term><term>Milieu aquatique</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Dry river beds are common worldwide and are rapidly increasing in extent due to the effects of water management and prolonged drought periods due to climate change. While attention has been given to the responses of aquatic invertebrates to drying rivers, few studies exist on the terrestrial invertebrates colonizing dry river beds. Dry river beds are physically harsh and they often differ substantially in substrate, topography, microclimate and inundation frequency from adjacent riparian zones. Given these differences, we predicted that dry river beds provide a unique habitat for terrestrial invertebrates, and that their assemblage composition differs from that in adjacent riparian zones. Dry river beds and riparian zones in Australia and Italy were sampled for terrestrial invertebrates with pitfall traps. Sites differed in substrate type, climate and flow regime. Dry river beds contained diverse invertebrate assemblages and their composition was consistently different from adjacent riparian zones, irrespective of substrate, climate or hydrology. Although some taxa were shared between dry river beds and riparian zones, 66 of 320 taxa occurred only in dry river beds. Differences were due to species turnover, rather than shifts in abundance, indicating that dry river bed assemblages are not simply subsets of riparian assemblages. Some spatial patterns in invertebrate assemblages were associated with environmental variables (irrespective of habitat type), but these associations were statistically weak. We suggest that dry river beds are unique habitats in their own right. We discuss potential human stressors and management issues regarding dry river beds and provide recommendations for future research.</div></front></TEI><affiliations><list><country><li>Allemagne</li><li>Australie</li></country><region><li>Berlin</li></region><settlement><li>Berlin</li></settlement></list><tree><country name="Australie"><noRegion><name sortKey="Steward, Alisha L" sort="Steward, Alisha L" uniqKey="Steward A" first="Alisha L." last="Steward">Alisha L. Steward</name></noRegion><name sortKey="Bunn, Stuart E" sort="Bunn, Stuart E" uniqKey="Bunn S" first="Stuart E." last="Bunn">Stuart E. Bunn</name><name sortKey="Choy, Satish" sort="Choy, Satish" uniqKey="Choy S" first="Satish" last="Choy">Satish Choy</name><name sortKey="Harch, Bronwyn" sort="Harch, Bronwyn" uniqKey="Harch B" first="Bronwyn" last="Harch">Bronwyn Harch</name><name sortKey="Marshall, Jonathan C" sort="Marshall, Jonathan C" uniqKey="Marshall J" first="Jonathan C." last="Marshall">Jonathan C. Marshall</name><name sortKey="Sheldon, Fran" sort="Sheldon, Fran" uniqKey="Sheldon F" first="Fran" last="Sheldon">Fran Sheldon</name></country><country name="Allemagne"><region name="Berlin"><name sortKey="Tockner, Klement" sort="Tockner, Klement" uniqKey="Tockner K" first="Klement" last="Tockner">Klement Tockner</name></region></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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