Impact of extreme climatic events on unionid mussels in a subtropical river basin
Impact of extreme climatic events on unionid mussels in a subtropical river basin
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亚热带流域极端气候事件对贻贝的影响
DOI：
10.1007/s10750-022-04819-7
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发表时间：
2022
期刊：
影响因子：
2.6
通讯作者：
A. Schwalb
中科院分区：
文献类型：
--
作者：
A. Tarter;D. Ford;D. E. Symonds;N. Ford;A. Schwalb
随着当前和未来的气候变化，预计极端干旱和洪水将会增加。这样的极端气候事件可能会对更坚固的生物产生持久的影响，比如处于高度危险中的淡水蚌。我们的研究目的是通过比较来自美国德克萨斯州一个生物多样性尚未得到充分研究的地区的近期和历史贻贝群落数据，来测试2011/2012年极端干旱、2017年极端洪水以及长期变化的具体预测。干旱的影响最严重，导致群落范围内的下降，表现为丰度、物种丰富度和被占用地点的显著下降。洪水导致了群落组成和空间分布的变化。长期以来，严重的下降和明显的群落转移都发生了，在那里，优势物种转移到那些更能忍受干扰的物种。盐水入侵可能导致一种已知能耐受微咸水的物种（Glebula rotundata）在洪水后显著增加。洪水的影响可能通过与广泛的回水地区的连接而得到缓冲，形成了大型湿地，在极端气候事件中，这些湿地可能成为贻贝的重要避难所。因此，保护湿地对于保护淡水贻贝及其提供的生态系统服务至关重要。
An increase in extreme droughts and floods is expected with current and future climate changes. Such extreme climate events may have long-lasting impact on more sessile organisms, such as unionid freshwater mussels, which are highly imperiled. The objective of our study was to test specific predictions for the impact of an extreme drought in 2011/2012, extreme flooding in 2017, and long-term changes by comparing recent and historical mussel community data from an understudied yet biodiverse region of Texas, USA. Drought had the most detrimental impact leading to community-wide declines, indicated by a significant decline of abundances, species richness and occupied sites. Flooding led to shifts in community composition and spatial distribution. Both severe declines and a distinct community shift occurred over the long-term, where the dominance of species shifted to those more tolerable of disturbance. Saltwater intrusion likely caused a significant increase post-flood of a species known to be tolerant of brackish water ( Glebula rotundata ). The impact of flooding was likely buffered by connectivity with extensive backwater areas, forming large wetlands, which may act as crucial refuges for mussels during extreme climatic events. Thus, protecting wetlands is crucial to protect freshwater mussels and the ecosystem services they provide.
影响因子：
10.1
作者：
Tully, Kate;Gedan, Keryn;Weston, Nathaniel B.
通讯作者：
Weston, Nathaniel B.