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首页> 外文期刊>Oceanology >Features of the Vertical Distribution of Net Mesoplankton at the Northern Margin of the North Atlantic Gyre (June-August 2001)
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Features of the Vertical Distribution of Net Mesoplankton at the Northern Margin of the North Atlantic Gyre (June-August 2001)

机译：北大西洋回旋带北缘的净中层浮游生物的垂直分布特征（2001年6月至8月）

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The vertical distribution of mesoplankton was studied over a single season in 2001 at two sites in the western and eastern parts of the northern margin of the North Atlantic gyre. Plankton was both sampled with the use of a BR 113/140 net and observed from a deep-water manned submersible. In the near-slope waters southeast of Newfoundland (site Titanic), an intensive interaction between the subtropical and subpolar waters and plankton communities occurs. The subtropical gyre community, which is more mature from the succession viewpoint, creates a "Network" of carnivores and scavengers (shrimp and smaller animals) feeding upon the plankton supplied from the north and thus increasing their own biomass Due to the features of the hydrological conditions, in 2001, in contrast to other years, the plankton supplied from the north was dominated by small copepods, while the number of the larger Calanus hyperboreus was small. Perhaps de to this fact, the abundance of macroplanktonic shrimp decreased, while the abundance of mesoplanktonic carnivores (Themisto, Sagitta, and Pareuchaeta) increased. In the eastern part of the ocean, in the Porcupine abyssal plain (site Bismark), the contrasts in the frontal interfaces decrease and the pattern of the community interaction becomes less expressed. While the vertical distribution of plankton at site Titanic is characterized by a series of extraordinary features, the distribution at site Bismark is much more ordinary.
机译：2001年在北大西洋回旋区北缘的西部和东部的两个地点对浮游生物的垂直分布进行了单季研究。浮游生物均使用BR 113/140网进行采样，并从深水载人潜水器中观察到。在纽芬兰东南部的近坡水域（泰坦尼克号站点），亚热带和亚极水域与浮游生物群落之间发生了强烈的相互作用。从演替角度来看，亚热带回旋群落更加成熟，它建立了一个食肉动物和清道夫（虾和小动物）的“网络”，它们依靠北方提供的浮游生物，从而增加了自身的生物量。在2001年的情况下，与其他年份相比，北部提供的浮游生物以小型pe足类动物为主，而较大的Calanus hyperboreus的数量很少。也许正因如此，大浮游性虾的丰度下降，而中浮游性食肉动物（Themisto，Sagitta和Pareuchaeta）的丰度增加。在海洋的东部，豪猪深渊平原（Bismark站点），额叶界面的对比度降低，群落相互作用的模式变得较少表达。虽然泰坦尼克号站点上浮游生物的垂直分布具有一系列非同寻常的特征，但比斯马克站点上的浮游生物分布却更为普通。

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