Arid
DOI10.1899/12-017.1
Invertebrates and sestonic matter in an advancing wetted front travelling down a dry river bed (Albarine, France)
Corti, Roland; Datry, Thibault
通讯作者Corti, Roland
来源期刊FRESHWATER SCIENCE
ISSN2161-9565
出版年2012
卷号31期号:4页码:1187-1201
英文摘要

Temporary rivers are shifting mosaics of aquatic and terrestrial habitat driven by hydrologic variability. Advancing wetted fronts (AWFs) that rewet dry river beds are unpredictable events, and knowledge about their composition and role in habitat mosaics is scarce. We collected dead and living terrestrial invertebrates, aquatic invertebrates, and sestonic matter (i.e., suspended sediments and organic matter) entrained by flow in an AWF travelling downstream over a 7-km-long dry reach. We collected samples at 12 sites along the rewetting reach and at 3 sites in the upstream perennial reach of the Albarine River, France. Invertebrates in the AWF were mainly of terrestrial origin and organic matter was essentially coarse (>5 mm). Terrestrial invertebrate density and taxonomic richness and sestonic matter concentration were several orders of magnitude higher in the AWF than in the perennial reach. However, only terrestrial invertebrate taxonomic richness increased longitudinally. At least 1/3 of terrestrial taxa could have survived submersion, and the density and taxonomic richness of these taxa decreased downstream. These results indicate that terrestrially derived material is stored downstream during rewetting where it could greatly stimulate in-stream aquatic productivity and succession in terrestrial invertebrates along the riparian zone. In contrast, entrained aquatic taxa represented similar to 15% of the benthic taxa collected 1 mo after rewetting, indicating a low contribution of AWFs to benthic invertebrate succession. In the context of global change and increasing appropriation of water resources by humans, our results suggest that conceptual models of invertebrate dynamic and organic matter processing in rivers should account for dry phases and transitional periods from dry to wet conditions.


英文关键词temporary rivers flash flood aquatic and terrestrial arthropods organic matter pulse
类型Article
语种英语
国家France
收录类别SCI-E
WOS记录号WOS:000311266300015
WOS关键词APPALACHIAN MOUNTAIN STREAMS ; TERRESTRIAL INVERTEBRATES ; ORGANIC-MATTER ; DESERT STREAM ; LEAF-LITTER ; MEDITERRANEAN STREAM ; ECOSYSTEM EXPANSION ; COMMUNITY STRUCTURE ; HEADWATER STREAMS ; TEMPORARY-RIVER
WOS类目Ecology ; Marine & Freshwater Biology
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/172427
作者单位Irstea, UR MALY, Biol Ecosyst Aquat, F-69336 Lyon, France
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Corti, Roland,Datry, Thibault. Invertebrates and sestonic matter in an advancing wetted front travelling down a dry river bed (Albarine, France)[J],2012,31(4):1187-1201.
APA Corti, Roland,&Datry, Thibault.(2012).Invertebrates and sestonic matter in an advancing wetted front travelling down a dry river bed (Albarine, France).FRESHWATER SCIENCE,31(4),1187-1201.
MLA Corti, Roland,et al."Invertebrates and sestonic matter in an advancing wetted front travelling down a dry river bed (Albarine, France)".FRESHWATER SCIENCE 31.4(2012):1187-1201.
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