Otolith biogeochemistry reveals possible impacts of extreme climate events on population connectivity of a highly migratory fish, Japanese Spanish mackerel Scomberomorus niphonius
文献类型： 外文期刊
作者： Pan, Xindong 1 ; Chen, Yong 4 ; Jiang, Tao 5 ; Yang, Jian 5 ; Tian, Yongjun 1 ;
作者机构： 1.Ocean Univ China, Deep Sea & Polar Fisheries Res Ctr, Qingdao 266003, Peoples R China
2.Ocean Univ China, Key Lab Mariculture, Minist Educ, Qingdao 266003, Peoples R China
3.Ocean Univ China, Frontiers Sci Ctr Deep Ocean Multispheres & Earth, Qingdao 266003, Peoples R China
4.SUNY Stony Brook, Sch Marine & Atmospher Sci, Stony Brook, NY 11794 USA
5.Chinese Acad Fishery Sci, Freshwater Fisheries Res Ctr, Key Lab Ecol Environm & Resources Inland Fisheries, Wuxi 214081, Peoples R China
关键词： Population connectivity; ENSO; Otolith biogeochemistry; Migration; Scomberomorus niphonius
期刊名称：MARINE LIFE SCIENCE & TECHNOLOGY （ 影响因子：5.7； 五年影响因子：5.8 ）
ISSN： 2096-6490
年卷期： 2024 年
页码：
收录情况： SCI
摘要： Climate change, particularly extreme climate events, is likely to alter the population connectivity in diverse taxa. While the population connectivity for highly migratory species is expected to be vulnerable to climate change, the complex migration patterns has made the measurement difficult and studies rare. However, otolith biogeochemistry provides the possibility to evaluate these climate-induced impacts. Japanese Spanish mackerel Scomberomorus niphonius is a highly migratory fish that is widely distributed in the northwest Pacific. Otoliths biogeochemistry of age-1 spawning or spent individuals from three consecutive years (2016-2018), during which a very strong El Ni & ntilde;o was experienced (2015-2016), were analyzed to evaluate the temporal variation of connectivity for S. niphonius population along the coast of China. The elemental concentrations of the whole otolith showed that Ba:Ca and Mg:Ca values were found to significantly increase in the El Ni & ntilde;o year. The random forest classification and clustering analysis indicated a large-scale connectivity between East China Sea and the Yellow Sea in the El Ni & ntilde;o year whereas the local S. niphonius assemblages in different spawning areas were more self-sustaining after the El Ni & ntilde;o year. These findings lead to the hypothesis that environmental conditions associated with the El Ni & ntilde;o Southern Oscillation (ENSO) events in the Northern Pacific Ocean would likely influence the population connectivity of S. niphonius. If so, extreme climate events can result in profound changes in the extent, pattern and connectivity of migratory fish populations. Our study demonstrates that otolith biogeochemistry could provide insight towards revealing how fish population response to extreme climate events.
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