Trends on the distribution of ciliates in the open Pacific Ocean
Trends on the distribution of ciliates in the open Pacific Ocean
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DOI：
10.1016/j.actao.2007.04.002
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发表时间：
2007-09-01
影响因子：
1.8
通讯作者：
Gomez, Fernando
中科院分区：
文献类型：
--
作者：
Gomez, Fernando
研究了漂潮和黑潮、菲律宾、苏禄、西里伯斯和南海以及赤道太平洋西部和中部的开放水域浮游纤毛虫、裸纤毛虫和裸纤毛虫的分布。估计了桡足类和后桡足类作为潜在捕食者的丰度。平均而言，tintinnids占alorate纤毛虫丰度的10-20% （50-200 cells L-1）。共记录到褐尾虫37属102种。从总体趋势看，物种丰富度最高的是中等贫营养水域。报道了一些感兴趣的分类群和未确定的标本的摄影记录。在亚北极的真尾流中，一些丁丁纲物种表现出高丰度波动，这可能是由桡足类控制的。夏季，桡足类丰度增加的同时，具有较长甲壳的类占主导地位。在温暖的开阔水域，纤毛虫物种的成功可能取决于它们的反放牧策略。附在带棘硅藻上的尤tintinus apertus是最普遍存在的物种。Tintinnids可能比无缘虫承受更低的捕食压力。lorica长度的增加或与硅藻的结合可能是一种反放牧策略，这决定了一个tintinnia分类群相对于其他同类物种的成功。在低营养条件下，虽然无缘纤毛虫受食物供应减少的影响比丁丁纤毛虫小，但总的趋势似乎是由捕食者（自上而下）而不是由食物资源的供应（自下而上）控制。(C) 2007 Elsevier Masson SAS。版权所有。
The distribution of planktonic ciliates, aloricate (naked) and loricate (tintinnid) was investigated in the open waters of the Oyashio and Kuroshio Currents, Philippine, Sulu, Celebes and South China Seas, and the western and central equatorial Pacific. The abundance of nauplii and post-naupliar copepods as potential predators was estimated. In average, the tintinnids represented 10-20% of the abundance of aloricate ciliates (50-200 cells L-1). One hundred and two species of 37 genera of tintirmids were recorded. As a general trend, the highest species richness was found in moderate oligotrophic waters. Photographic records of some taxa of interest and unidentified specimens were reported. In the subarctic waters of the Oyashio Current, a few tintinnid species showed high abundance fluctuations that may be controlled by the copepods. During the summer the species of Parafavella with longer loricae predominated in parallel to the increase of the copepodite abundance. In warm open waters, the success of a ciliate species could depend on its anti-grazing strategy. Eutintinnus apertus attached to a spine-bearing diatom was the most ubiquitous species. Tintinnids may be subjected to lower predation pressure than aloricate ciliates. The increase of the lorica length or the association with diatoms may be an anti-grazing strategy, which determines the success of one tintinnid taxon versus other congeneric species. Although the aloricate ciliates would be less affected than tintinnids by the reduction of food availability under oligotrophic conditions, the ciliate populations as a general trend seem to be controlled by the predators (top-down) rather than by the availability of food resources (bottom-up). (C) 2007 Elsevier Masson SAS. All rights reserved.