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首页> 外文期刊>Estuarine Coastal and Shelf Science >Life between tides: Spatial and temporal variations of an intertidal macroalgal community at Potter Peninsula, South Shetland Islands, Antarctica
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Life between tides: Spatial and temporal variations of an intertidal macroalgal community at Potter Peninsula, South Shetland Islands, Antarctica

机译：潮汐之间的生活：南极南设得兰群岛波特半岛潮间带大型藻类群落的时空变化

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摘要

Intertidal zones are one of the most studied habitats in the world. However, in Antarctica, further studies are needed for a more complete understanding of these systems. When conspicuous Antarctic intertidal communities occur, macroalgae are a key component. Given that intertidal communities have a fast response to variations in environmental conditions and could reflect climate fluctuations, we conducted a non-destructive study with photographic transects in an intertidal zone at Potter Peninsula, Isla 25 de Mayo/King George Island, over four years and during five months of the warm season. We tested the general hypothesis that macroalgal intertidal communities are mainly structured by the vertical stress gradient and that changes in temperature between seasons and between years have a great influence in the macroalgal community structure. Spatial, seasonal and inter-annual variations were studied using GLM, quantile regression and NMDS ordinations. The vertical stress gradient was the main factor that explained macroalgal cover. The Low and the Middle level shared similarities, but the latter was more variable. The High level had the lowest cover, richness and diversity. The dominant species here was the endemic red alga Pyropia endiviifolia, which is strongly adapted to extreme conditions. At the Middle level, there was a significant increase in macroalgal cover during spring months, and it stabilized in summer. Inter-annual variations showed that there is a strong variation in the total macroalgal cover and community structure over the studied years. Environmental conditions have a significant effect in shaping the studied intertidal community, which is very sensitive to climate oscillations. An increase in temperature produced a decrease of annual ice foot cover, number of snow days and - as a result - an increase in macroalgal cover. In a global climate-change scenario, a shift in species composition could also occur. Species with wide physiological tolerance that grow in warmer conditions, like Palmaria decipiens, could benefit, while other species will be discriminated. More detailed studies are necessary to predict future changes in Antarctic intertidal communities. (C) 2016 Published by Elsevier Ltd.
机译：潮间带是世界上研究最多的栖息地之一。但是，在南极洲，需要进一步研究以更全面地了解这些系统。当出现明显的南极潮间带群落时，大型藻类是关键组成部分。鉴于潮间带社区对环境条件的变化具有快速反应并可以反映气候波动，我们在长达25年的时间里，在位于梅奥岛25号岛/乔治岛的波特半岛的潮间带进行了摄影断面的非破坏性研究，在温暖季节的五个月内。我们检验了一般的假设，即大藻类潮间带群落主要由垂直应力梯度构成，并且季节之间和年份之间的温度变化对大藻类群落结构有很大影响。使用GLM，分位数回归和NMDS规范研究了空间，季节和年际变化。垂直应力梯度是解释大型藻类覆盖的主要因素。低级和中级具有相似之处，但后者更具可变性。高级别的覆盖率，丰富性和多样性最低。这里的优势种是特有的红藻Pyropia endiviifolia，它非常适合极端条件。在中层，春季的大面积藻类覆盖率显着增加，夏季稳定。年际变化表明，在所研究的年份中，总的大型藻类覆盖和群落结构存在很大的变化。环境条件对形成所研究的潮间带群落具有重要影响，这对气候振荡非常敏感。温度升高导致每年的冰足覆盖减少，下雪天数减少，结果，大型藻类覆盖增加。在全球气候变化的情况下，物种组成也可能发生变化。在较温暖的条件下生长的具有宽生理耐受性的物种（例如棕果）可能会受益，而其他物种则会受到歧视。需要更详细的研究来预测南极潮间带群落的未来变化。 （C）2016由Elsevier Ltd.出版

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2017年第5期|193-203|共11页
  • 作者

    Laura Marcias Maria; Deregibus Dolores; Ariel Saravia Leonardo; Laura Campana Gabriela; Liliana Quartino Maria;

  • 作者单位

    Univ Buenos Aires, Fac Ciencias Exactas & Nat, Intendente Guiraldes 2160,Ciudad Univ,Pabellon 2, Buenos Aires, DF, Argentina;

    Inst Antartico Argentine, Dept Biol Costera, Direct Nacl Antartico, 25 Mayo 7143,San Martin CP 1650, Buenos Aires, DF, Argentina;

    Univ Nacl Gen Sarmiento, Inst Ciencias, JM Gutierrez 1150,B1613GSX, Los Polvorines, Argentina;

    Inst Antartico Argentine, Dept Biol Costera, Direct Nacl Antartico, 25 Mayo 7143,San Martin CP 1650, Buenos Aires, DF, Argentina|Univ Nacl Lujan, Dept Ciencias Basicas, Ruta 5 & Ave Constitut,CP 6700, Lujan, Buenos Aires, Argentina;

    Inst Antartico Argentine, Dept Biol Costera, Direct Nacl Antartico, 25 Mayo 7143,San Martin CP 1650, Buenos Aires, DF, Argentina|Museo Argentino Ciencias Nat Bernardino Rivadavia, B Rivadavia Av,A Gallardo 470,C1405DJR, Buenos Aires, DF, Argentina;

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

    Benthos; Seaweeds; Ecological zonation; Aquatic communities; Community structure; Isla 25 de Mayo/King George Island;

    机译：Benthos;海藻;生态区划;水生社区;社区结构;Isla 25 de Mayo / King George Island;

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