Arid
DOI10.1111/fwb.12522
Resistance and resilience of invertebrate communities to seasonal and supraseasonal drought in arid-land headwater streams
Bogan, Michael T.1; Boersma, Kate S.2; Lytle, David A.2
通讯作者Bogan, Michael T.
来源期刊FRESHWATER BIOLOGY
ISSN0046-5070
EISSN1365-2427
出版年2015
卷号60期号:12页码:2547-2558
英文摘要

Climate change is expected to intensify drought in many regions, but ecological impacts on stream communities are poorly understood. Many arid-land streams are characterised by predictable seasonal cycles of wetting and drying, to which species are adapted, but unpredictable supraseasonal droughts may constitute extreme events that challenge resident biota. In this article, we synthesise research conducted in arid-land streams of the Madrean Sky Islands (MSI) in Arizona, U.S.A, to evaluate the resistance and resilience of invertebrate communities to drying disturbances caused by normal seasonal drying and severe supraseasonal drought. We also highlight how spatial context (e.g. distance to perennial refuges) influences recovery patterns. Invertebrate community structure changes predictably as habitat contraction progresses from loss of lateral connectivity to complete drying of MSI streams. When drying events are predictable (e.g. seasonal drying), post-drought community recovery is often rapid, since most MSI taxa possess life history traits conferring high resistance and/or resilience to stream drying. Extreme supraseasonal droughts, in contrast, cause unprecedented transitions from perennial to intermittent flow in some MSI streams. While species richness may recover quickly following this flow regime shift, marked turnover in community structure can occur and may delay or preclude recovery to pre-drought conditions. In such cases, short-lived (<1year) strong dispersers replace relatively long-lived (1year) weak dispersers. As habitat isolation increases, the potential for community recovery from extreme drought decreases. Many MSI aquatic species are threatened by extreme drought. Extinctions of endemic aquatic species due to habitat drying have already been observed in nearby deserts. Further studies are urgently needed to identify drought-sensitive species and understand how the loss of such species may affect stream ecosystem functioning.


英文关键词community recovery disturbance extreme climatic events flow regime long-term study
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000364233800008
WOS关键词POPULATION GENETIC-STRUCTURE ; SONORAN DESERT ; AQUATIC INSECTS ; LONG-TERM ; MACROINVERTEBRATE ASSEMBLAGES ; HYPORHEIC ZONE ; FLOW ; DISPERSAL ; RESPONSES ; CLIMATE
WOS类目Ecology ; Marine & Freshwater Biology
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology
来源机构University of California, Berkeley
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/187342
作者单位1.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA;
2.Oregon State Univ, Dept Integrat Biol, Corvallis, OR 97331 USA
推荐引用方式
GB/T 7714
Bogan, Michael T.,Boersma, Kate S.,Lytle, David A.. Resistance and resilience of invertebrate communities to seasonal and supraseasonal drought in arid-land headwater streams[J]. University of California, Berkeley,2015,60(12):2547-2558.
APA Bogan, Michael T.,Boersma, Kate S.,&Lytle, David A..(2015).Resistance and resilience of invertebrate communities to seasonal and supraseasonal drought in arid-land headwater streams.FRESHWATER BIOLOGY,60(12),2547-2558.
MLA Bogan, Michael T.,et al."Resistance and resilience of invertebrate communities to seasonal and supraseasonal drought in arid-land headwater streams".FRESHWATER BIOLOGY 60.12(2015):2547-2558.
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