Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14133 |
Detrimental effects of a novel flow regime on the functional trajectory of an aquatic invertebrate metacommunity | |
Ruhi, Albert1,2; Dong, Xiaoli3; McDaniel, Courtney H.4; Batzer, Darold P.5; Sabo, John L.6 | |
2018-08-01 | |
发表期刊 | GLOBAL CHANGE BIOLOGY |
ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2018 |
卷号 | 24期号:8页码:3749-3765 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Novel flow regimes resulting from dam operations and overallocation of freshwater resources are an emerging consequence of global change. Yet, anticipating how freshwater biodiversity will respond to surging flow regime alteration requires overcoming two challenges in environmental flow science: shifting from local to riverscape-level understanding of biodiversity dynamics, and from static to time-varying characterizations of the flow regime. Here, we used time-series methods (wavelets and multivariate autoregressive models) to quantify flow-regime alteration and to link time-varying flow regimes to the dynamics of multiple local communities potentially connected by dispersal (i.e., a metacommunity). We studied the Chattahoochee River below Buford dam (Georgia, U.S.A.), and asked how flow regime alteration by a large hydropower dam may control the long-term functional trajectory of the downstream invertebrate metacommunity. We found that seasonal variation in hydropeaking synchronized temporal fluctuations in trait abundance among the flow-altered sites. Three biological trait states describing adaptation to fast flows benefitted from flow management for hydropower, but did not compensate for declines in 16 loser traits. Accordingly, metacommunity-wide functional diversity responded negatively to hydropeaking intensity, and stochastic simulations showed that the risk of functional diversity collapse within the next 4years would decrease by 17% if hydropeaking was ameliorated, or by 9% if it was applied every other season. Finally, an analysis of 97 reference and 23 dam-affected river sites across the U.S. Southeast suggested that flow variation at extraneous, human-relevant scales (12-hr, 24-hr, 1-week) is relatively common in rivers affected by hydropower dams. This study advances the notion that novel flow regimes are widespread, and simplify the functional structure of riverine communities by filtering out taxa with nonadaptive traits and by spatially synchronizing their dynamics. This is relevant in the light of ongoing and future hydrologic alteration due to climate non-stationarity and the new wave of dams planned globally. |
英文关键词 | Biological traits hydrologic alteration invertebrates time-series methods |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000437284700038 |
WOS关键词 | ECOLOGICAL CONSEQUENCES ; ENVIRONMENTAL FLOWS ; COMMUNITY STABILITY ; BASIC PRINCIPLES ; WAVELET ANALYSIS ; RAPID EVOLUTION ; RIVER ; HYDROPOWER ; STREAM ; WATER |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/17069 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA; 2.Univ Maryland, Natl Socioenvironm Synth Ctr SESYNC, Annapolis, MD USA; 3.Duke Univ, Nicholas Sch Environm, Durham, NC 27708 USA; 4.SUNY Coll Brockport, Dept Environm Sci & Ecol, Brockport, NY 14420 USA; 5.Univ Georgia, Dept Entomol, Athens, GA 30602 USA; 6.Arizona State Univ, Sch Life Sci, Tempe, AZ USA |
推荐引用方式 GB/T 7714 | Ruhi, Albert,Dong, Xiaoli,McDaniel, Courtney H.,et al. Detrimental effects of a novel flow regime on the functional trajectory of an aquatic invertebrate metacommunity[J]. GLOBAL CHANGE BIOLOGY,2018,24(8):3749-3765. |
APA | Ruhi, Albert,Dong, Xiaoli,McDaniel, Courtney H.,Batzer, Darold P.,&Sabo, John L..(2018).Detrimental effects of a novel flow regime on the functional trajectory of an aquatic invertebrate metacommunity.GLOBAL CHANGE BIOLOGY,24(8),3749-3765. |
MLA | Ruhi, Albert,et al."Detrimental effects of a novel flow regime on the functional trajectory of an aquatic invertebrate metacommunity".GLOBAL CHANGE BIOLOGY 24.8(2018):3749-3765. |
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