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首页> 外文期刊>Polar biology >Composition, abundance and distribution of holoplanktonic polychaetes within the Strait of Magellan (southern America) in austral summer
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Composition, abundance and distribution of holoplanktonic polychaetes within the Strait of Magellan (southern America) in austral summer

机译：夏季南方麦哲伦海峡（南美洲）内的全浮游多毛多足动物的组成，丰度和分布

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摘要

This study enlarge the knowledge on species composition, distribution and community structure of pelagic polychaetes on the basis of finely stratified spatial sampling representing austral summer conditions in the Strait of Magellan. Zooplankton samples were collected in late austral summer 1995. A total of 56,489 pelagic poly-chaete specimens were collected. Eight holopelagic poly-chaete taxa were recorded in addition to Spionidae and Terebellidae larvae and reproductive stolons of Autolyti-nae. Pelagobia longicirrata (Lopadorhynchidae) was the most abundant species, representing about 96 % (54,092 specimens, 184.6 ind. 100 m~(-3)) of all individuals, followed by Tomopteris planktonis (Tomopteridae) at 3 % (1,725 specimens, 5.9 ind. 100 m~(-3)). The longest measured individuals belonged to T. planktonis, which also showed the largest size range, whereas the smallest individuals belonged to P. longicirrata. Spatial distribution of polychaetes in terms of abundance was not related to bottom depth, but rather the number of taxa was lower in the central part of the Strait. P. longicirrata and T. planktonis were negatively related to chlorophyll a. In addition, the first was negatively related to temperature instead the second was positively affected by salinity. Polychaetes were widely distributed in both epi-and mesopelagic realms, whereas they were almost absent above 80 m depth. Both of the most abundant species were concentrated in the deepest layers sampled (below 100 m) throughout day and night hours without showing any specific migratory behavior.
机译：这项研究是在代表麦哲伦海峡夏季夏季条件的精细分层空间采样的基础上，扩大了中上层多毛鱼类物种组成，分布和群落结构的知识。浮游动物样本于1995年南夏季末收集。总共收集了56,489个上层多沙哑标本。除了夜蛾科和夜蛾科的幼虫以及Autolyti-nae的繁殖茎之外，还记录了八种狼蛛多科类群。长白腹侧柏（Lopadorhynchidae）是最丰富的物种，占所有个体的约96％（54,092标本，184.6 ind。100 m〜（-3）），其次是3％（1,725标本，5.9 ind 100 m〜（-3））。最长的个体属于浮游生物，也显示出最大的大小范围，而最小的个体属于长木对虾。多足动物在空间上的分布与海底深度无关，但是海峡中部的分类单元数量较少。 P. longicirrata和T.platetonis与叶绿素a负相关。另外，第一个与温度负相关，而第二个与盐度正相关。多毛cha广泛分布在上，中生界，而深度超过80 m则几乎不存在。在白天和黑夜中，两种最丰富的物种都集中在最深的采样层（100 m以下）中，而没有表现出任何特定的迁徙行为。

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  • 来源
    《Polar biology》 |2014年第7期|999-1015|共17页
  • 作者

    R. Guglielmo; M. C. Gambi; A. Granata; L. Guglielmo; R. Minutoli;

  • 作者单位

    Laboratory of Benthos Ecology, Zoological Station 'Anton Dohrn', Punta S. Pietro, 80077 Ischia, Naples, Italy;

    Laboratory of Benthos Ecology, Zoological Station 'Anton Dohrn', Punta S. Pietro, 80077 Ischia, Naples, Italy;

    Department of Biological and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres 31, 98166 S. Agata Messina, Italy;

    Department of Biological and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres 31, 98166 S. Agata Messina, Italy;

    Department of Biological and Environmental Sciences, University of Messina, Viale Ferdinando Stagno D'Alcontres 31, 98166 S. Agata Messina, Italy;

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  • 正文语种 eng
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  • 关键词

    Pelagic polychaetes; Strait of Magellan; Community structure; Distribution; Pelagobia longicirrata; Tomopteris planktonis;

    机译：浮游多毛类;麦哲伦海峡;社区结构;分配;Pelagobia longicirrata;浮游藻;

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