Diel, seasonal, and interannual patterns in mesozooplankton abundance in the Sargasso Sea

Diel, seasonal, and interannual patterns in mesozooplankton abundance in the Sargasso Sea
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马尾藻海中型浮游动物丰度的昼夜、季节和年际模式

DOI:
10.1093/icesjms/fsy117
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发表时间:
2018
影响因子:
3.3
通讯作者:
Woodson, C Brock
Woodson, C Brock
中科院分区:
农林科学2区
文献类型:
--
作者:
Ivory, Jami A;Steinberg, Deborah K;Latour, Robert J;Woodson, C Brock

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浮游动物丰度的时间变化影响浮游食物网的相互作用和生态地球化学。我们列举了中型浮游动物每月白天和夜间拖在上层区在百慕大大西洋时间序列研究(BATS)网站在马尾藻海(1999-2010年)。使用ZooScan成像系统和显微镜确定每个分类群的丰度。广义线性模型被用来确定最能解释丰度模式的环境参数。具有明显昼夜垂直迁移的类群包括磷虾类、端足类、Limacinaspp。翼足类动物和其他带壳翼足类动物。春季丰度峰值明显的类群包括磷虾类、无鳍类和Limacinaspp.,剑水蚤桡足类在夏末达到高峰,哲水蚤桡足类在冬末春初和夏季达到高峰。许多类群增加,在2003年,与硅藻水华和最大的初级生产高峰的时间序列。从长期来看,哲水蚤和有孔虫桡足类和介形类的数量呈上升趋势,藤壶无节幼体的数量显著增加。亚十年尺度的气候振荡和长期变暖可能导致有壳翼足类动物和无壳类动物的减少。毛颚类丰度增加,主要猎物类群,哲水蚤桡足类密度增加。哲水蚤桡足类和介形类的增加,增加水柱分层指数和大西洋年代际振荡指数,表明温暖的海面温度有利于这些类群。
Temporal changes in mesozooplankton abundance affect planktonic food web interactions and biogeochemistry. We enumerated mesozooplankton from monthly day and night tows in the epipelagic zone at the Bermuda Atlantic Time-series Study (BATS) site in the Sargasso Sea (1999–2010). Abundances of each taxon were determined using a ZooScan imaging system and microscopy. Generalized linear models were used to determine environmental parameters that best explained abundance patterns. Taxa with pronounced diel vertical migration included euphausiids, amphipods,Limacinaspp. pteropods, and other shelled pteropods. Taxa with a pronounced spring abundance peak included euphausiids, appendicularians, andLimacinaspp., while harpacticoid copepods peaked in late summer, and calanoid copepods in late winter/early spring and summer. Many taxa increased in 2003, coincident with a diatom bloom and the largest primary production peak in the time series. Long-term, increasing trends occurred in calanoid and oncaeid copepods, and ostracods, with barnacle nauplii significantly increasing. Sub-decadal-scale climate oscillations and long-term warming may be driving decreases in shelled pteropods and appendicularians. Chaetognath abundance increased in response to increased density of a major prey taxon, calanoid copepods. Calanoid copepods and ostracods increased with increasing water column stratification index and the Atlantic Multidecadal Oscillation index, indicating warmer sea surface temperatures favour these taxa.
DOI: 10.2307/1542036
发表时间: 1994-02-01
影响因子: 1.6
作者:
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