Increased occurrence of the jellyfish Periphylla periphylla in the European high Arctic
Increased occurrence of the jellyfish Periphylla periphylla in the European high Arctic
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DOI：
10.1007/s00300-018-2368-4
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发表时间：
2018-12-01
期刊：
影响因子：
1.7
通讯作者：
Last, Kim
中科院分区：
文献类型：
--
作者：
Geoffroy, Maxime;Berge, Jorgen;Last, Kim
水母Periphylla periphylla，这可能会对环境产生强烈的生态影响，在挪威海无处不在，预计其范围将向北延伸。自2014年以来，巴伦支海北方的P. periphylla出现增加，2017年1月，在斯匹次卑尔根岛西部的北极峡湾（>78度N）首次收集到几个个体。在极夜期间普遍存在的低太阳辐照度以及自过去十年以来欧洲北极相对温暖的大西洋水流入量的增加可能为水母在冬季殖民斯瓦尔巴特峡湾提供了合适的条件。然而，在午夜太阳期间，避光限制了喜光的P. periphylla到更深的离岸区域。目前在极夜期间在北极高峡湾出现的P.periphylla在短期内对海洋生态系统的影响有限，但如果其丰度继续增加，长期影响就更不确定了。
The jellyfish Periphylla periphylla, which can have strong ecological impacts on its environment, is ubiquitous in the Norwegian Sea and its range was predicted to extend northwards. The occurrence of P. periphylla in the northern Barents Sea increased since 2014 and, for the first time, several individuals were collected within a high Arctic fjord (>78 degrees N) in western Spitsbergen in January 2017. The low solar irradiance prevailing during the polar night and an increased inflow of relatively warm Atlantic water in the European Arctic since the last decade likely provide suitable conditions for the medusa to colonize Svalbard's fjords during the winter months. However, light avoidance constrains the photophobic P. periphylla to deeper offshore areas during the midnight sun period. The current occurrence of P. periphylla in high Arctic fjords during the polar night will have a limited impact on marine ecosystems in the short term, but long-term effects are more uncertain if its abundance continues to increase.