Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1071/MF11060 |
Is the hyporheic zone a refuge for macroinvertebrates in drying perennial streams? | |
Young, B. A.1,2; Norris, R. H.1; Sheldon, F.2 | |
通讯作者 | Young, B. A. |
来源期刊 | MARINE AND FRESHWATER RESEARCH
![]() |
ISSN | 1323-1650 |
出版年 | 2011 |
卷号 | 62期号:12页码:1373-1382 |
英文摘要 | Drought and drying of perennial streams plays a central role in determining the structure of in-stream communities, decreasing taxa richness and abundance and changing trophic organisation. Further, flow cessation can increase spatial beta-diversity of macroinvertebrate communities across disconnected sites. It has been hypothesised that the hyporheic zone may act as a refugium for benthic macroinvertebrates during low flow and flow cessation, but evidence remains equivocal. We explored hyporheic and surface benthic macroinvertebrate community changes associated with low flow and flow cessation conditions during a supra-seasonal drought on two normally perennial rivers: the Cotter and Queanbeyan Rivers ( Canberra, ACT). Surface benthic and hyporheic samples were collected from these two rivers and four associated tributary streams across a drying gradient during dry conditions and after flow recovery to test whether macroinvertebrates in perennial streams utilise the hyporheic zone as a refugium and whether there is greater variability in the macroinvertebrate community at sites experiencing flow cessation compared with wetter sites. Low flow had no impact on macroinvertebrate taxa richness or density in either surface benthic or hyporheic habitats, whereas density and taxa richness declined during streambed drying, suggesting that the hyporheic zone did not provide a refugium for some taxa during these dry conditions. Spatial beta-diversity peaked at dry sites, likely in response to the broad range of environmental conditions that may differ between refuges and sites, but decreased after flow recovery. Refuges in perennial streams appear more vulnerable to human disturbances during dry periods because a loss of suitable refuges can affect the ability of some macroinvertebrate taxa to recolonise after flow recovery. |
英文关键词 | aquatic insects drought hyporheos low flow refugia streambed drying |
类型 | Article |
语种 | 英语 |
国家 | Australia |
收录类别 | SCI-E |
WOS记录号 | WOS:000297517600003 |
WOS关键词 | AUSTRALIAN DRYLAND RIVERS ; SUPRA-SEASONAL DROUGHT ; 2 INTERMITTENT STREAMS ; NEW-ZEALAND ; DESERT STREAM ; FAUNAL COMPOSITION ; HEADWATER STREAMS ; FLOW VARIABILITY ; AQUATIC REFUGIA ; WATER-QUALITY |
WOS类目 | Fisheries ; Limnology ; Marine & Freshwater Biology ; Oceanography |
WOS研究方向 | Fisheries ; Marine & Freshwater Biology ; Oceanography |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/169613 |
作者单位 | 1.Univ Canberra, Inst Appl Ecol, Bruce, ACT 2601, Australia; 2.Griffith Univ, Griffith Sch Environm, Australian Rivers Inst, Nathan, Qld 4111, Australia |
推荐引用方式 GB/T 7714 | Young, B. A.,Norris, R. H.,Sheldon, F.. Is the hyporheic zone a refuge for macroinvertebrates in drying perennial streams?[J],2011,62(12):1373-1382. |
APA | Young, B. A.,Norris, R. H.,&Sheldon, F..(2011).Is the hyporheic zone a refuge for macroinvertebrates in drying perennial streams?.MARINE AND FRESHWATER RESEARCH,62(12),1373-1382. |
MLA | Young, B. A.,et al."Is the hyporheic zone a refuge for macroinvertebrates in drying perennial streams?".MARINE AND FRESHWATER RESEARCH 62.12(2011):1373-1382. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。