Influence of sequential hurricanes on nekton communities in a Southeast Florida estuary: Short-term effects in the context of historical variations in freshwater inflow
Influence of sequential hurricanes on nekton communities in a Southeast Florida estuary: Short-term effects in the context of historical variations in freshwater inflow
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连续飓风对佛罗里达州东南部河口游生物群落的影响：淡水流入历史变化背景下的短期影响
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
M. Thomas
中科院分区：
文献类型：
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作者：
T. Switzer;B. Winner;N. Dunham;J. A. Whittington;M. Thomas
我们研究了Nekton社区层面对飓风France和Jeanne的反应，这两个飓风于2004年在佛罗里达州东南部的圣露西河口相隔20天登陆。这些风暴的通过导致大量淡水排放超过150m3 S−1，以及整个河口范围的盐度下降和河口北叉的近低氧条件持续了几个月。尽管这种环境变化并不少见，但河口大部分地区群落结构的季节性格局受到了干扰，这可能是对盐度异常迅速下降的反应。飓风过后，内河口的几种淡水和低盐类群(即蓝蟹、ShadDorosoma spp.和瓢虫Elopps saurus)的丰度显著增加，而其他几种鱼类(即黑线鱼Mugil cephalus、白鱼M)的丰度显著增加。Crerema、Lookdown Selene Vmer、猪鱼Orthopristis chrysoptera和PinfishLagodon rhombodes)下降。尼克顿社区迅速恢复，到了春季，河口大部分地区的社区结构与飓风前的情况几乎没有区别。尽管Nekton社区对飓风相关的干扰很有弹性，但预计未来几十年大西洋飓风活动和相关淡水排放的增加可能会考验佛罗里达州河口社区的弹性。
We examined nekton community-level responses to Hurricanes Frances and Jeanne, which made landfall 20 d apart in the St. Lucie estuary in southeastern Florida in 2004. The passage of these storms contributed to large freshwater discharges that exceeded 150 m3 s−1, as well as estuary-wide reductions in salinity and near-hypoxic conditions in the North Fork of the estuary that persisted for several months. Although such environmental variations are not uncommon, seasonal patterns of community structure were disturbed throughout much of the estuary, likely in response to uncharacteristically-rapid reductions in salinity. Immediately following the hurricanes, abundances of several freshwater and oligohaline taxa (i.e., blue crabCallinectes sapidus, shadDorosoma spp., and ladyfishElops saurus) increased markedly in the inner estuary, while abundances of several other fishes (i.e., striped mulletMugil cephalus, white mulletM. curema, lookdownSelene vomer, pigfishOrthopristis chrysoptera, and pinfishLagodon rhomboides) declined. Nekton communities recovered quickly, and by spring, community structure throughout much of the estuary was indistinguishable from pre-hurricane conditions. Although nekton communities were resilient to hurricane-related disturbances, projected increases in Atlantic hurricane activity and associated freshwater discharges over the coming decades may test the resilience of estuarine communities in Florida.