Ocean deoxygenation and zooplankton: Very small oxygen differences matter
Ocean deoxygenation and zooplankton: Very small oxygen differences matter
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DOI：
10.1126/sciadv.aau5180
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发表时间：
2018-12
期刊：
影响因子：
13.6
通讯作者：
K. Wishner;B. Seibel;C. Roman;C. Deutsch;Dawn M. Outram;C. Shaw;Matthew A. Birk;K. Mislan;
中科院分区：
文献类型：
--
作者：
K. Wishner;B. Seibel;C. Roman;C. Deutsch;Dawn M. Outram;C. Shaw;Matthew A. Birk;K. Mislan;
新的中水海洋采样表明，生理决定了浮游动物在亚中尺度低氧特征的分布。氧气最少区(OMZ)是氧气含量极低的大片中水地区，预计将因气候变化而扩大。虽然氧气在构建中水生态系统中很重要，但对氧气对浮游动物的影响缺乏精确和机械的理解。浮游动物是中水食物网和生物地球化学循环的重要组成部分。在这里，我们表明，在热带北太平洋东部OMZ，以前未被描述的亚中尺度氧气变率对许多主要浮游动物种群的分布有直接影响。尽管对低氧有极强的耐受性，但许多浮游动物生活在它们的生理极限附近，并对氧气的轻微变化(≤1%)做出反应。因此，海洋氧气损失(除氧)可能会对中水生态系统的结构和功能造成重大的、意想不到的变化。
Novel midwater ocean sampling shows that physiology dictates zooplankton distributions in submesoscale low oxygen features. Oxygen minimum zones (OMZs), large midwater regions of very low oxygen, are expected to expand as a result of climate change. While oxygen is known to be important in structuring midwater ecosystems, a precise and mechanistic understanding of the effects of oxygen on zooplankton is lacking. Zooplankton are important components of midwater food webs and biogeochemical cycles. Here, we show that, in the eastern tropical North Pacific OMZ, previously undescribed submesoscale oxygen variability has a direct effect on the distribution of many major zooplankton groups. Despite extraordinary hypoxia tolerance, many zooplankton live near their physiological limits and respond to slight (≤1%) changes in oxygen. Ocean oxygen loss (deoxygenation) may, thus, elicit major unanticipated changes to midwater ecosystem structure and function.