Coastal evacuations by fish during extreme weather events
Coastal evacuations by fish during extreme weather events
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DOI：
10.1038/srep30280
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发表时间：
2016-07-26
影响因子：
4.6
通讯作者：
Secor, David H.
中科院分区：
文献类型：
--
作者：
Bailey, Helen;Secor, David H.
由于气候变化，预计极端事件的强度和频率将会增加。在沿海生态系统中，飓风和洪水可导致水质发生巨大变化，导致河口动物大量死亡。兼性迁移行为是一个关键的适应，动物可以撤离生态灾难，但在海洋系统中的研究仍然很少。在这里，我们确定沿海疏散，否则居民河条纹鲈鱼在哈德逊河口，纽约，美国，在2011年秋季的热带风暴的强烈时期造成的。这些风暴产生了创纪录的降雨量和大量的水排放到哈德逊河口，增加了水位，降低了水温，盐度和溶解氧水平。条纹鲈鱼迁出河口，表现出新的迁移行为，这可能是在响应强大的流量和不合适的条件。在风暴过后的几个月里，一些鱼展示了返回河口的探索之旅，这可能是为了在冬季剩余时间返回之前评估条件。条纹鲈鱼和其他沿海鱼类对天气事件的行为适应将取决于关键种群的维持和畅通无阻的疏散路线。
An increase in the intensity and frequency of extreme events is predicted to occur as a result of climate change. In coastal ecosystems, hurricanes and flooding can cause dramatic changes in water quality resulting in large mortality events in estuarine fauna. Facultative migration behaviors represent a key adaptation by which animals can evacuate ecological catastrophes, but remain poorly studied in marine systems. Here we identify coastal evacuations by otherwise resident riverine striped bass in the Hudson River Estuary, New York, USA, caused by an intense period of tropical storms in autumn 2011. These storms produced record rainfall and high water discharges into the Hudson River Estuary that increased the water level and reduced the water temperature, salinity and dissolved oxygen levels. Striped bass moved out of the estuary, exhibiting novel migration behaviours, that may have been in response to the strong flow and unsuitable conditions. In the months following the storms, some fish demonstrated exploratory trips back to the estuary, which may have been to assess the conditions before returning for the remainder of the winter. Behavioural adaptions to weather events by striped bass and other coastal fishes will depend on maintenance of key population segments and unimpeded evacuation routes.