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首页> 外文期刊>ICES Journal of Marine Science >The evolving response of mesopelagic fishes to declining midwater oxygen concentrations in the southern and central California Current
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The evolving response of mesopelagic fishes to declining midwater oxygen concentrations in the southern and central California Current

机译：中生鱼类对加利福尼亚南部和中部海流中水中氧气浓度下降的反应

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摘要

Declining oxygen concentrations in the deep ocean, particularly in areas with pronounced oxygen minimum zones (OMZs), are a growing global concern related to global climate change. Its potential impacts on marine life remain poorly understood. A previous study suggested that the abundance of a diverse suite of mesopelagic fishes off southern California was closely linked to trends in midwater oxygen concentration. This study expands the spatial and temporal scale of that analysis to examine how mesopelagic fishes are responding to declining oxygen levels in the California Current (CC) off central, southern, and Baja California. Several warm-water mesopelagic species, apparently adapted to the shallower, more intense OMZ off Baja California, are shown to be increasing despite declining midwater oxygen concentrations and becoming increasingly dominant, initially off Baja California and subsequently in the CC region to the north. Their increased abundance is associated with warming near-surface ocean temperature, the warm phase of the Pacific Decadal oscillation and Multivariate El Nino-Southern Oscillation Index, and the increased flux of Pacific Equatorial Water into the southern CC.
机译：在深海中，特别是在具有最低氧气最小区（OMZs）的地区，氧气浓度的下降是与全球气候变化有关的全球关注的焦点。其对海洋生物的潜在影响仍然知之甚少。先前的一项研究表明，加利福尼亚南部海域多种中生鱼类的丰度与中水中氧气浓度的趋势密切相关。这项研究扩大了该分析的时空尺度，以检验中生鱼类对中部，南部和下加利福尼亚州的加利福尼亚洋流（CC）中氧气含量下降的反应。尽管中水中的氧气浓度下降，并且逐渐占优势，但似乎已经适应了下加利福尼亚州较浅，强度更高的OMZ的几种中温中生藻种仍在增加，起初是在加利福尼亚下加利福尼亚州，然后在北部的CC地区。它们的丰度增加与近地表海洋温度的升高，太平洋年代际振荡的暖相和多变量厄尔尼诺-南方涛动指数以及太平洋赤道水进入南部CC的通量增加有关。

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