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Titolo:
Conservation value of variable connectivity: aquatic invertebrate assemblages of channel and floodplain habitats of a central Australian arid-zone river, Cooper Creek
Autore:
Sheldon, F; Boulton, AJ; Puckridge, JT;
Indirizzi:
Griffith Univ, CRCFE, Fac Environm Sci, Nathan, Qld 4111, Australia Griffith Univ Nathan Qld Australia 4111 Sci, Nathan, Qld 4111, Australia Univ New England, Armidale, NSW 2351, Australia Univ New England ArmidaleNSW Australia 2351 rmidale, NSW 2351, Australia Univ Adelaide, Dept Environm Biol, Adelaide, SA 5005, Australia Univ Adelaide Adelaide SA Australia 5005 ol, Adelaide, SA 5005, Australia
Titolo Testata:
BIOLOGICAL CONSERVATION
fascicolo: 1, volume: 103, anno: 2002,
pagine: 13 - 31
SICI:
0006-3207(200201)103:1<13:CVOVCA>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
CANONICAL CORRESPONDENCE-ANALYSIS; BENTHIC MACROINVERTEBRATES; SPECIES-DIVERSITY; FLOW REGULATION; DRYLAND RIVERS; DARLING RIVER; ECOSYSTEMS; SYSTEM; ECOLOGY;
Keywords:
dryland rivers; aquatic macroinvertebrate assemblages; drying; flooding; flow; connectivity; biodiversity; habitats; scale; Australia;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Sheldon, F Griffith Univ, CRCFE, Fac Environm Sci, Nathan, Qld 4111, Australia Griffith Univ Nathan Qld Australia 4111 n, Qld 4111, Australia
Citazione:
F. Sheldon et al., "Conservation value of variable connectivity: aquatic invertebrate assemblages of channel and floodplain habitats of a central Australian arid-zone river, Cooper Creek", BIOL CONSER, 103(1), 2002, pp. 13-31

Abstract

Rapidly expanding water resource development in arid and semi-arid zones of Australia threatens the flow regime and ecological integrity of the few large dryland rivers and their immense floodplains. Efforts to manage and conserve the surface waters of these rivers are hampered by limited scientific data on the ecology of their flora and fauna and on their responses to the high natural variability of flow regime that typifies dryland rivers. Irregular floods connect channel and floodplain wetlands to differing degrees and for varying periods of time but the ecological significance of this connectivity is poorly understood. On Cooper Creek, a large dryland river in central Australia. we explored the degree to which assemblage composition varied with connectivity and hydrological regime. Shortly after protracted regional flooding, we sampled aquatic macroinvertebrate assemblages from the principal microhabitats in 12 channel and floodplain wetlands. Ephemeral and temporary lakes tended to have fewer taxa than semi-permanent channel or terminal lake habitats. Although hydrological connection had only recently been lost for some wetlands, there was already evidence of divergence in aquatic macroinvertebrate assemblage composition. Disruption of the natural variability in connectivity and hydrological regime by excessive water abstraction or river-flow regulation threatens the ecological integrity and aquatic macroinvertebrate biodiversity of dryland rivers. Preservation of the irregular flow regime and sporadic connectivity underpins conservation of the mosaic of floodplain wetlands that play such a crucial role in the ecosystem functioning of rivers such as Cooper Creek. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/06/20 alle ore 20:22:35