Extreme weather events threaten biodiversity and functions of river ecosystems: evidence from a meta‐analysis
Extreme weather events threaten biodiversity and functions of river ecosystems: evidence from a meta‐analysis
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极端天气事件威胁生物多样性和河流生态系统的功能：荟萃分析的证据
DOI：
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发表时间：
2022
影响因子：
--
通讯作者：
Juan David González‐Trujillo
中科院分区：
文献类型：
--
作者：
S. Sabater;A. Freixa;Laura Jiménez;J. López;G. Pace;C. Pascoal;N. Perujo;D. Craven;Juan David González‐Trujillo
渐进的和极端的气候变化都会在河流生态系统中引发复杂的生态反应。目前尚不清楚趋势或事件影响在多大程度上改变了河流生态系统的生物多样性和功能，这给对其未来动态的预测增加了相当大的不确定性。利用71项已发表研究的综合数据库，我们表明，与水流和温度极端变化相关的事件效应--而不是趋势效应--大大减少了物种丰富度。此外，由于逐步变化，事件对生物多样性和初级生产力的影响--特别是影响水文动态的影响--是影响的两倍。现有证据的综合表明，事件效应会导致河流生态系统的状况发生变化，特别是影响到无脊椎动物等生物。在极端天气事件中，与断流相关的干旱对河流的生物群和生态系统功能造成的影响最大。对生态系统功能(初级生产、有机质分解和呼吸)的影响是不对称的，只有初级生产对极端天气事件表现出负面反应。我们的荟萃分析强调了事件影响对河流生物多样性和生态系统功能的不成比例的影响，并对河流生态系统的长期养护和管理产生了影响。然而，热带地区的研究很少，因此我们的结论在很大程度上仍然局限于温带河流系统。需要作出进一步努力，收集有关河流生物多样性和功能的极端事件的证据。
Both gradual and extreme weather changes trigger complex ecological responses in river ecosystems. It is still unclear to what extent trend or event effects alter biodiversity and functioning in river ecosystems, adding considerable uncertainty to predictions of their future dynamics. Using a comprehensive database of 71 published studies, we show that event – but not trend – effects associated with extreme changes in water flow and temperature substantially reduce species richness. Furthermore, event effects – particularly those affecting hydrological dynamics – on biodiversity and primary productivity were twice as high as impacts due to gradual changes. The synthesis of the available evidence reveals that event effects induce regime shifts in river ecosystems, particularly affecting organisms such as invertebrates. Among extreme weather events, dryness associated with flow interruption caused the largest effects on biota and ecosystem functions in rivers. Effects on ecosystem functions (primary production, organic matter decomposition and respiration) were asymmetric, with only primary production exhibiting a negative response to extreme weather events. Our meta‐analysis highlights the disproportionate impact of event effects on river biodiversity and ecosystem functions, with implications for the long‐term conservation and management of river ecosystems. However, few studies were available from tropical areas, and our conclusions therefore remain largely limited to temperate river systems. Further efforts need to be directed to assemble evidence of extreme events on river biodiversity and functioning.
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影响因子：
30.7
作者：
Milner, Alexander M.;Robertson, Anne L.;Brown, Lee E.
通讯作者：
Brown, Lee E.
干扰、营养物和先前的水流条件影响北极河流大型无脊椎动物群落结构和生产力
影响因子：
4.5
作者：
Kendrick, Michael R.;Hershey, Anne E.;Huryn, Alexander D.
通讯作者：
Huryn, Alexander D.
影响因子：
56.9
作者：
Blowes, Shane A.;Supp, Sarah R.;Dornelas, Maria
通讯作者：
Dornelas, Maria
温带低地溪流超季节水文干旱期间和之后的叶子腐烂过程
影响因子：
1.9
作者：
Schlief
通讯作者：
Schlief
影响因子：
1.9
作者：
Niyogi, Dev K.;Hu, Chia-Yi;Vessell, Brett P.
通讯作者：
Vessell, Brett P.