Effects of experimental multi-season drought on abundance, richness, and beta diversity patterns in perennially flowing stream insect communities
Effects of experimental multi-season drought on abundance, richness, and beta diversity patterns in perennially flowing stream insect communities
复制标题
实验性多季节干旱对常年流动的溪流昆虫群落丰度、丰富度和β多样性模式的影响
DOI：
10.1007/s10750-021-04735-2
复制
发表时间：
2021
期刊：
影响因子：
2.6
通讯作者：
Herbst, D. B.
中科院分区：
文献类型：
--
作者：
Saffarinia, P.;Anderson, K. E.;Herbst, D. B.
在气候变化的情况下，预计淡水系统将经历更多的极端水文现象。为了确定如何小流可能会受到影响的流动制度的转变，我们实验模拟流量损失的跨度三个夏天在9个50米的自然喂养流通道。这些流的水生昆虫群落进行了采样之前，期间和之后的实验性干旱处理，以及以下一个不可预见的洪水事件。作为改变流态的生物效应的指标，测量了丰度、丰度和β多样性。降雨量与流量损失成比例下降。与此相反，我们观察到的阈值响应丰富的丰富度并没有减少，除了在渠道的损失发生的表面流和断开池仍然存在。洪水重新设定了这一模式，但此后不久，社区继续其先前的轨迹。β多样性分区表明没有强烈的成分变化，干旱的影响主要是经历均匀的类群，直到流量停止。作为一个避难所，维持稳定的丰度梯度和更高的丰富度比浅滩。流量恢复后，丰度和丰富度在一年内恢复到治疗前的水平。我们的研究结果表明，许多分类群存在耐干旱条件下，直到损失的表面流发生。
Freshwater systems are projected to experience increased hydrologic extremes under climate change. To determine how small streams may be impacted by shifts in flow regimes, we experimentally simulated flow loss over the span of three summers in nine 50 m naturally fed stream channels. The aquatic insect community of these streams was sampled before, during, and after experimental drought treatments as well as following one unforeseen flood event. Abundance, richness, and beta diversity were measured as indicators of biotic effects of altered flow regimes. Abundance declined in proportion to flow loss. In contrast, we observed a threshold response in richness where richness did not decrease except in channels where losses of surface flow occurred and disconnected pools remained. The flood reset this pattern, but communities continued their prior trajectories shortly thereafter. Beta diversity partitions suggested no strong compositional shifts, and that the effect of drought was largely experienced uniformly across taxa until flow cessation. Pools served as a refuge, maintaining stable abundance gradients and higher richness longer than riffles. Upon flow resumption, abundance and richness returned to pre-treatment levels within one year. Our results suggest that many taxa present were resistant to drought conditions until loss in surface flow occurred.
登录
查看更多内容
干旱随着时间的推移改变了河流无脊椎动物群落的功能稳定性
影响因子：
3.9
作者：
C. Leigh;Thomas W. H. Aspin;T. Matthews;R. Rolls;M. Ledger
通讯作者：
M. Ledger
影响因子：
2.2
作者：
Stromberg, JC;Bagstad, KJ;Makings, E
通讯作者：
Makings, E
影响因子：
2.7
作者：
Boersma, Kate S.;Bogan, Michael T.;Lytle, David A.
通讯作者：
Lytle, David A.
大型无脊椎动物种子库促进跨气候区临时河流中群落的持久存在
DOI：
--
发表时间：
2013
期刊：
影响因子：
--
作者：
R. Stubbington;T. Datry
通讯作者：
T. Datry
酸矿流中赤杨蝇（Sialis aequalis Banks）的生活史
DOI：
--
发表时间：
1973
期刊：
影响因子：
--
作者：
J. E. Woodrum;D. Tarter
通讯作者：
D. Tarter