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首页> 外文期刊>Polar biology >Microbiological characterization of a semi-enclosed sub-Antarctic environment: the Straits of Magellan
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Microbiological characterization of a semi-enclosed sub-Antarctic environment: the Straits of Magellan

机译：半封闭的南极亚封闭环境的微生物学表征：麦哲伦海峡

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摘要

Among sub-Antarctic ecosystems, the microbiology of the Straits of Magellan has been poorly documented due to the scarcity of observations. In this context, the spatial distribution of microbiological parameters, both in terms of abundance (total picoplankton and picophytoplankton, cultivable heterotrophic bacteria) and biochemical assays (adenosine triphosphate and lipolysac-charide estimations, as well as electron transport system activity), was investigated in the epipelagic layer along the Straits during late summer 1991 and early autumn 1995. The microbial dynamics showed significant variations along the Straits, with increasing values generally determined eastward both in 1991 and 1995. Microbiological results were additionally correlated with available data on the physico-chemical and biological properties of thernanalyzed water masses. Taking into consideration the whole dataset, the principal component analysis led to the identification of three main macro-areas along the Straits of Magellan (Paso Largo, Paso Ancho and Angostura/Isla Isabel) with different trophic features. This held true when the two cruises were individually considered, as well as when comparing each macro-area between the two cruises. Additionally, a first attempt to quantify the carbon flux through the microbial compartment within the main identified macro-areas was made. The present work will allow the gaining of further understanding of the microbiology of this under-investigated sub-Antarctic marine ecosystem.
机译：在南极次生态系统中，由于缺乏观测资料，麦哲伦海峡的微生物学文献很少。在这种情况下，研究了微生物参数的空间分布，包括丰度（总浮游细菌和浮游植物，可培养的异养细菌）和生化测定（三磷酸腺苷和脂多糖的估计以及电子传输系统的活性）。 1991年夏末和1995年秋初，海峡沿岸上层。微生物动力学显示海峡沿岸变化很大，1991年和1995年都确定为东升值。微生物学结果还与可利用的物理化学数据相关分析水团的生物学特性。考虑到整个数据集，主成分分析导致沿麦哲伦海峡（Paso Largo，Paso Ancho和Angostura / Isla Isabel）具有三个不同营养特征的三个主要宏观区域得以识别。当分别考虑两次巡航时以及比较两次巡航之间的每个宏区域时，这都是正确的。另外，首次尝试量化通过主要识别的大区域内微生物区室的碳通量。目前的工作将使人们对该未得到充分研究的南极海洋生态系统的微生物学有进一步的了解。

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  • 来源
    《Polar biology》 |2010年第11期|p.1485-1504|共20页
  • 作者

    E. Crisafi; M. Azzaro; A. Lo Giudice; L. Michaud; R. La Ferla; T. L. Maugeri; M. De Domenico; F. Azzaro; M. L. C. Acosta Pomar; V. Bruni;

  • 作者单位

    Istituto per l'Ambiente Marino Costiero (IAMC-CNR), Spianata San Raineri, 98122 Messina, Italy;

    rnIstituto per l'Ambiente Marino Costiero (IAMC-CNR), Spianata San Raineri, 98122 Messina, Italy;

    rnDipartimento di Biologia Animale ed Ecologia Marina (DBAEM), University of Messina, Salita Sperone 31,98166 Messina, Italy;

    rnDipartimento di Biologia Animale ed Ecologia Marina (DBAEM), University of Messina, Salita Sperone 31,98166 Messina, Italy;

    rnIstituto per l'Ambiente Marino Costiero (IAMC-CNR), Spianata San Raineri, 98122 Messina, Italy;

    rnDipartimento di Biologia Animale ed Ecologia Marina (DBAEM), University of Messina, Salita Sperone 31,98166 Messina, Italy;

    rnDipartimento di Biologia Animale ed Ecologia Marina (DBAEM), University of Messina, Salita Sperone 31,98166 Messina, Italy;

    rnIstituto per l'Ambiente Marino Costiero (IAMC-CNR), Spianata San Raineri, 98122 Messina, Italy;

    rnDipartimento di Biologia Animale ed Ecologia Marina (DBAEM), University of Messina, Salita Sperone 31,98166 Messina, Italy;

    rnDipartimento di Biologia Animale ed Ecologia Marina (DBAEM), University of Messina, Salita Sperone 31,98166 Messina, Italy;

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  • 正文语种 eng
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  • 关键词

    epipelagic layer; microbial abundances; ATP; LPS; ETS; spatial distribution;

    机译：上层微生物丰度;ATP;LPS;ETS;空间分布;

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