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Seasonal constancy (summer vs. winter) of benthic size spectra in an Arctic fjord

机译：北极峡湾底栖大小频谱的季节性恒定性（夏季与冬季）

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摘要

Size spectra are important descriptors of community structure and can indicate changes in community functioning in response to shifts in environmental conditions. There are relatively few assessments of benthic size spectra, and most are based on summer samples alone. Processes influencing size spectra, such as recruitment and predation pressure, vary seasonally, and understanding this variation is necessary to interpret patterns in time or space. Here we compare summer and winter biomass size spectra in the central basin of Kongsfjorden (west Spitsbergen). We recorded seasonal changes in the quality of organic matter available to the benthos, indicated by higher chloroplastic pigments concentrations in surface sediments in summer, as well as in differences in total abundance and biomass of both macrofauna and meiofauna. No significant seasonal differences were documented by multiple regression models for the normalized biomass and size classes. The slope of a linear relationship between normalized biomass and size classes was -0.54 +/- 0.02 indicating a productive system, compared to ecosystems like estuaries. Summer-winter invariability of size spectra suggests that benthic community functioning in this Arctic fjordic system is relatively independent from the seasonality in the supply of organic matter produced in water column.
机译：尺寸谱是群落结构的重要描述，可以指示群落功能随环境条件的变化而变化。底栖规模谱的评估相对较少，大多数仅基于夏季样本。影响大小频谱的过程（例如，募集和捕食压力）随季节变化，因此了解这种变化对于解释时间或空间的模式是必要的。在这里，我们比较了Kongsfjorden（西斯匹次卑尔根）中部盆地夏季和冬季的生物量大小谱。我们记录了底栖动物可用有机物质量的季节性变化，这表明夏季表层沉积物中的氯塑料色素含量较高，以及大型动物和小型动物的总丰度和生物量的差异。多元回归模型对归一化的生物量和大小分类没有明显的季节性差异。与河口等生态系统相比，归一化生物量和大小分类之间的线性关系的斜率为-0.54 +/- 0.02，表明具有生产系统。规模谱的夏-冬不变性表明，该北极峡湾系统的底栖生物群落相对独立于水柱中有机物供应的季节性。

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  • 来源
    《Polar biology》 |2019年第7期|1255-1270|共16页
  • 作者

    Mazurkiewicz Mikolaj; Gorska Barbara; Renaud Paul E.; Legezynska Joanna; Berge Jorgen; Wlodarska-Kowalczuk Maria;

  • 作者单位

    Polish Acad Sci, Inst Oceanol, Dept Marine Ecol, Powstancow Warszawy 55, PL-81712 Sopot, Poland;

    Polish Acad Sci, Inst Oceanol, Dept Marine Ecol, Powstancow Warszawy 55, PL-81712 Sopot, Poland;

    Fram Ctr Climate & Environm, Akvaplan Niva, N-9296 Tromso, Norway|Univ Ctr Svalbard, N-9071 Longyearbyen, Norway;

    Polish Acad Sci, Inst Oceanol, Dept Marine Ecol, Powstancow Warszawy 55, PL-81712 Sopot, Poland;

    Univ Ctr Svalbard, N-9071 Longyearbyen, Norway|UiT Arctic Univ Norway, Fac Biosci Fisheries & Econ, Dept Arctic & Marine Biol, N-9037 Tromso, Norway;

    Polish Acad Sci, Inst Oceanol, Dept Marine Ecol, Powstancow Warszawy 55, PL-81712 Sopot, Poland;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Zoobenthos; Meiofauna; Size spectra; Arctic winter; Biomass;

    机译：Zoobenthos;Meiofauna;尺寸光谱;北极冬季;生物量;

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