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首页> 外文期刊>ICES Journal of Marine Science >Spatial patterns of large jellyfish Chrysaora plocamia blooms in the Northern Humboldt Upwelling System in relation to biological drivers and climate
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Spatial patterns of large jellyfish Chrysaora plocamia blooms in the Northern Humboldt Upwelling System in relation to biological drivers and climate

机译：洪堡北部上升流系统中大型水母Chrysaora plocamia盛开的空间格局与生物驱动力和气候的关系

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摘要

In the Northern Humboldt Upwelling System (NHUS), one of the most productive ecosystems in the world, the large jellyfish Chrysaora plocamia exhibits high inter-annual variability in population size, often resulting in massive blooms. In this study, we examined the geographic patterns C. plocamia in the NHUS and their spatial overlap with ichthyoplankton, zooplankton, and chlorophyll a concentration (Chl a) during two El Nino(EN)years(1982-1983 and 1986-1987), and a neutral year (2014). During EN years, the spatial extent of C plocamia medusae was larger than in the neutral year. In 1982-1983, medusae were concentrated mainly in the central-southern and southern regions of Peru, where they were associated with zooplankton, sardine larvae, and Chi a. In 1986-1987, medusae occurred in the northern and southern regions and spatially overlapped with sardine larvae and Chi a, and with zooplankton and anchoveta larvae, respectively. In 2014, medusae occurred mainly in the northern region, where they were associated with zooplankton, Chi a, and anchoveta eggs and larvae. Our results indicate strong EN effects on the distribution and abundance of C plocamia, which can have consequences for zooplankton and ichthyo-plankton abundance, as well as fisheries, in the NHUS.
机译：在世界上生产力最高的生态系统之一的北部洪堡上升流系统（NHUS）中，大型水母Chrysaora plocamia的种群数量年际变化很大，通常会导致大量开花。在这项研究中，我们研究了厄尔尼诺（EN）两年（1982-1983年和1986-1987年）NHUS中的隐孢子虫的地理格局及其与鱼鳞浮游生物，浮游动物和叶绿素a浓度（Chl a）的空间重叠，和中性年份（2014年）。在EN年中，水母C plocamia的空间范围大于中年。 1982年至1983年，水母主要集中在秘鲁的中南部和南部地区，它们与浮游动物，沙丁鱼幼虫和Chi a有关。 1986年至1987年，水母在北部和南部发生，并在空间上与沙丁鱼幼虫和Chi a以及浮游动物和an鱼幼虫重叠。 2014年，水母​​主要发生在北部地区，与浮游动物，奇亚和a鱼卵和幼虫有关。我们的结果表明，EN对C plocamia的分布和丰度具有很强的影响，这可能对NHUS中的浮游动物和鱼鳞浮游生物的丰度以及渔业产生影响。

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