The effects of hurricane Rita and subsequent drought on alligators in southwest Louisiana.
The effects of hurricane Rita and subsequent drought on alligators in southwest Louisiana.
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飓风丽塔和随后的干旱对路易斯安那州西南部短吻鳄的影响。
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
Mark Merchant
中科院分区：
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作者：
V. Lance;R. Elsey;G. Butterstein;P. L. Trosclair;Mark Merchant
2005年9月，飓风丽塔袭击了路易斯安那州西南部的海岸。风暴产生了大约四米高的巨大潮汐，将数千英亩的沿海沼泽淹没在最大强度的海水中。最初的激增导致了一些鳄鱼的死亡，给幸存下来的人带来了严重的压力。此外，飓风过后的长期干旱(111年有记录的天气数据中的最低降雨量)导致了高度盐碱化的状况，在沼泽中持续了几个月。飓风过后不到一个月，我们有机会从霍利海滩上的鳄鱼身上采集了11个血样，但直到2006年2月才从洛克菲勒野生动物保护区的鳄鱼身上采集到样本。洛克菲勒避难所的条件不允许系统采样，但截至2006年8月，该避难所总共收集了201个样本。对血液样本进行了钠、钾、氯化物、渗透压和皮质酮的分析。2005年10月在霍利海滩采集的鳄鱼血液样本显示，血浆渗透压、钠、氯、钾、皮质酮显著升高，异嗜性/淋巴细胞比率升高。洛克菲勒保护区鳄鱼的血液样本显示，随着干旱的持续，皮质酮水平不断上升，渗透压和电解质水平上升。经过七月和八月的大量降雨后，这些渗透胁迫指数恢复到正常范围内。
Hurricane Rita struck the coast of southwest Louisiana in September 2005. The storm generated an enormous tidal surge of approximately four meters in height that inundated many thousands of acres of the coastal marsh with full strength seawater. The initial surge resulted in the deaths of a number of alligators and severely stressed those who survived. In addition, a prolonged drought (the lowest rainfall in 111 years of recorded weather data) following the hurricane resulted in highly saline conditions that persisted in the marsh for several months. We had the opportunity to collect 11 blood samples from alligators located on Holly Beach less than a month after the hurricane, but were unable to collect samples from alligators on Rockefeller Wildlife Refuge until February 2006. Conditions at Rockefeller Refuge did not permit systematic sampling, but a total of 201 samples were collected on the refuge up through August 2006. The blood samples were analyzed for sodium, potassium, chloride, osmolality, and corticosterone. Blood samples from alligators sampled on Holly Beach in October 2005, showed a marked elevation in plasma osmolality, sodium, chloride, potassium, corticosterone, and an elevated heterophil/lymphocyte ratio. Blood samples from alligators on Rockefeller Refuge showed increasing levels of corticosterone as the drought persisted and elevated osmolality and electrolytes. After substantial rainfall in July and August, these indices of osmotic stress returned to within normal limits.