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Description of diatoms from the Southwest to West Greenland coastal and open marine waters

机译：西南至西格陵兰沿海和开放海域硅藻的描述

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摘要

Detailed studies on sub-Arctic and Arctic marine diatom assemblages contribute to the understanding of spatial distribution patterns and their physical drivers. In this study, diatom species were analyzed from water samples collected with a Niskin bottle rosette combined with a CTD along the West Greenland coast (63°58′N-71°08′N and 50°49′W-59°06′W) during summer 2007. Diatom community was represented mainly by three genera Thalassiosira, Fragilariopsis, and Chaetoceros and linked to observed hydrographic and environmental conditions. Thalassiosira spp. were common in coastal waters (particularly Godthabsfjord) and linked to increased surface water temperature, typical of summer water stratification in West Greenland. Fragilariopsis spp., along with other dominant species associated with higher geographic latitudes, dominated in Arctic fjords (Uummannaq Fjord-Qaumarujuk Fjord). These species generally characterized coastal waters influenced by melting sea ice and/or glacial ice. Chaetoceros spp. were linked to more saline open marine waters, particularly in the Davis Strait south of 70°N, probably corresponding to weaker water stratification and the influence of the West Greenland Current. The present paper provides new knowledge on diatom assemblages along a south-north climate gradient in West Greenland, which is necessary in order to understand how observed ocean-climate changes influence Arctic marine ecosystems. This study provides a reference for palaeoen-vironmental reconstructions using diatom microfossils deposited in the West Greenland marine sediments.
机译：对亚北极和北极海洋硅藻组合的详细研究有助于理解空间分布模式及其物理驱动力。在这项研究中，分析了使用Niskin瓶玫瑰花结和CTD沿西格陵兰海岸（63°58′N-71°08′N和50°49′W-59°06′W ）在2007年夏季。硅藻群落主要由Thalassiosira，Fragilariopsis和Chaetoceros三个属组成，并与观测到的水文和环境状况有关。 Thalassiosira spp。常见于沿海水域（尤其是哥德堡峡湾），并与地表水温升高有关，这是西格陵兰夏季水分层的典型特征。在北极峡湾（Uummannaq峡湾-Qaumarujuk峡湾）中，脆藻属物种以及与较高地理纬度相关的其他优势种占主导地位。这些物种的特征通常是受融化的海冰和/或冰川冰影响的沿海水域。 Chaetoceros spp。与更多的盐水开放海水有关，特别是在南纬70°以南的戴维斯海峡，这可能与较弱的水分层和西部格陵兰洋流的影响有关。本文提供了关于西格陵兰西南-北向气候梯度上的硅藻组合的新知识，这对于了解观测到的海洋气候变化如何影响北极海洋生态系统是必要的。这项研究为使用沉积在西格陵兰海洋沉积物中的硅藻微化石进行古环境重建提供了参考。

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  • 来源
    《Polar biology》 |2014年第11期|1589-1606|共18页
  • 作者

    Diana W. Krawczyk; Andrzej Witkowski; Joanna J. Waniek; Marcin Wroniecki; Jan Harff;

  • 作者单位

    Greenland Climate Research Centre, Greenland Institute of Natural Resources, Box 570, 3900 Nuuk, Greenland,Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, 70-383 Szczecin, Poland;

    Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, 70-383 Szczecin, Poland;

    Leibniz Institute for Baltic Sea Research, Warnemuende, Seestrasse 15, 18119 Rostock, Germany;

    Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, 70-383 Szczecin, Poland;

    Palaeoceanology Unit, Faculty of Geosciences, University of Szczecin, Mickiewicza 18, 70-383 Szczecin, Poland;

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  • 正文语种 eng
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  • 关键词

    Diatoms; West Greenland; Hydrographic conditions; Summer water stratification; West Greenland Current;

    机译：硅藻;西格陵兰岛;水文条件;夏季水分层;西格陵兰潮流;

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