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首页> 外文期刊>Marine ecology >First reports of a mass mortality event across multiple life stages in a mesopelagic jellyfish in high latitude coastal waters
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First reports of a mass mortality event across multiple life stages in a mesopelagic jellyfish in high latitude coastal waters

机译:首次报道高纬度沿海水域中生水母在多个生命阶段的大规模死亡事件

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摘要

Mass mortality events can occur naturally and may have important ecological impacts on local populations. The abundance and stage structure of the coronate scyphozoan Periphylla periphylla in a Northern Norwegian fjord were studied between October 2010 and August 2011. Developmental stage composition varied for the duration of the study, with early developmental stages only present in the autumn and winter. Records of large number of dead P.periphylla across multiple life stages revealed that a mass mortality event occurred towards the end of the study period. The abundance of live medusa increased from 27 to 39 individuals (ind.)1,000m(-3) from October 2010 to February 2011, then fell to 10ind.1,000m(-3) in August 2011. The estimated abundance of dead jellyfish increased from slightly 1ind.1,000m(-3) in October 2010 to 34ind.1,000m(-3) in August 2011, corresponding to an estimated population mortality of 80% on the last sampling date. Mortality increased as the length of high solar irradiance periods increased. Based on previous published evidence that strong light is harmful to P.periphylla, we speculate whether the light climate of this high latitude location may have contributed to the mass mortality of P.periphylla.
机译:大规模死亡事件可以自然发生,并且可能对当地人口产生重要的生态影响。在2010年10月至2011年8月之间,研究了挪威北部峡湾的冠状棘足动物Periphylla periphylla的丰度和阶段结构。在研究期间,发育阶段的组成有所变化,早期的发育阶段仅在秋季和冬季出现。在多个生命阶段中大量死去的P.periphylla的记录显示,在研究期末发生了大规模死亡事件。从2010年10月到2011年2月,活着的美杜莎的数量从27个人增加到39个人(ind。)1,000m(-3),然后在2011年8月下降到<10ind.1,000m(-3)。从2010年10月的> 1ind.1,000m(-3)略微增加到2011年8月的> 34ind.1,000m(-3),对应于上次采样日期的估计死亡率> 80%。随着高太阳辐照时间长度的增加,死亡率增加。根据以前公开的证据,强光对P.periphylla有害,我们推测这种高纬度地区的光照气候是否可能对P.periphylla的大规模死亡有贡献。

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