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首页> 外文期刊>Oceanography >Composition, Spatial Distribution, and Trophic Srrucrure of the ZOOPLANKTON COMMUNITY in San Jorge Gulf, Southwestern Atlantic Ocean
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Composition, Spatial Distribution, and Trophic Srrucrure of the ZOOPLANKTON COMMUNITY in San Jorge Gulf, Southwestern Atlantic Ocean

机译：西南大西洋圣豪尔赫湾动物园浮游生物群落的组成，空间分布和营养结构

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摘要

The goal of this study was to understand the zooplankton community composition and food web structure in San Jorge Gulf (45 degrees-47 degrees S, 65 degrees 30 degrees'W), a highly productive marine ecosystem in southern Argentina. A spatial grid of 14 stations was sampled in 2014. The sampled zooplankton community was composed of 30 taxa, with copepods accounting for 83% of the total abundance. Community composition was strongly related to surface temperature and water column stratification. Two distinct zooplankton assemblages were present. The zones designated North and Center were dominated by Ctenocalanus vanus; copepodite stages of C. vanus, Clausocalanus brevipes, and Paracalanus parvus; appendicularians; and Oithona helgolandica. The South zone was dominated by P parvus, copepodites, Acartia tonsa, and Drepanopus forcipatus. The plankton food webs were increasingly enriched in carbon and nitrogen stable isotopes from the North to the South. Depleted delta C-13 signatures in the North may be explained by terrigenous inputs derived from strong westerly winds. The zooplankton taxa displayed a wide feeding range in the North, whereas the narrow trophic space of the South food web suggested similar feeding strategies among the taxa. Appendicularians were positioned at the base of the food webs, copepods were in the middle, and chaetognaths occupied high trophic positions.
机译：这项研究的目的是了解阿根廷南部南部高产的海洋生态系统圣豪尔赫湾（45度至47度南纬65度30度西岸）的浮游动物群落组成和食物网结构。 2014年对14个站点的空间网格进行了采样。采样的浮游动物群落由30个分类单元组成，co足类占总丰度的83％。群落组成与地表温度和水柱分层密切相关。存在两种不同的浮游动物组合。指定为北部和中部的区域以斑节菜为主。 C. vanus，Clausocalanus brevipes和Paracalanus parvus的角足类阶段；盲人和Oithona helgolandica。南部地区主要是小叶天竺葵，co足类，tons螨和D形纲（Drepanopus forcipatus）。从北部到南部，浮游生物的食物网越来越富含碳和氮稳定的同位素。北部地区C-13三角洲签名枯竭的原因可能是强西风产生的陆源输入。北部的浮游动物分类群显示了广泛的觅食范围，而南部食物网的狭窄营养空间表明，这些分类群之间的觅食策略相似。食人鱼位于食物网的底部，co足类动物位于中间，而e鱼则占据较高的营养位置。

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  • 来源
    《Oceanography》 |2018年第4期|154-163|共10页
  • 作者

    Gimenez Eloisa M.; Winkler Gesche; Hoffmeyer Monica; Ferreyra Gustavo A.;

  • 作者单位

    Consejo Nacl Invest Cient & Tecn, CADIC, Lab Ecol Fisiol & Evoluc Organismos Acuat, Ushuaia, Tierra Del Fueg, Argentina;

    Univ Quebec Rimouski, ISMER, Quebec City, PQ, Canada;

    Univ Tecnol Nacl, Fac Reg Bahia Blanca, Bahia Blanca, Buenos Aires, Argentina|Univ Nacl Sur, CONICET, IADO, Bahia Blanca, Buenos Aires, Argentina;

    Univ Quebec Rimouski, ISMER, Quebec City, PQ, Canada|Consejo Nacl Invest Cient & Tecn, CADIC, Ushuaia, Tierra Del Fueg, Argentina;

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