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首页> 外文期刊>Estuarine Coastal and Shelf Science >Sea ice increases benthic community heterogeneity in a seagrass landscape
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Sea ice increases benthic community heterogeneity in a seagrass landscape

机译：海冰在海草景观中增加了底栖群落异质性

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摘要

Sea ice plays an important role in subpolar seagrass meadows. It protects meadows against wave action and extreme temperatures. On the other hand, sea ice destroys seagrass leaves and removes plots of sediments and organics debris, leaving long-lasting ice-made tidal pools of various shapes and sizes within the meadow. The present study aimed at investigating the effect of sea ice on benthic community structure and biogeochemical processes in a subpolar seagrass meadow. Vegetated areas (V), artificially-created (aTP), and natural (nTP) tidal pools were sampled from April to October 2018 in a seagrass meadow located at Manicouagan Peninsula (Quebec; 49 degrees 5'36 '' N, 68 degrees 12'44 '' W). aTP and nTP showed similar sediment characteristics with coarser sediment and lower particulate organic carbon and total nitrogen content but also lower NOx and higher NH4+ and PO43- porewater concentrations as compared to V. Benthic macrofauna communities showed a strong seasonality with very reduced total density, biomass and species richness during wintertime (from December to April) relatively to summertime (from June to September). Benthic macrofauna communities were also more diversified and abundant in V than in aTP and nTP. Species assemblages in aTP and nTP represented a subset of species assemblages in V with any species found exclusively in tidal pools. However, total biomass was similar among treatments, suggesting that tidal pools sheltered larger individuals than vegetated areas. These results underline the importance of considering the spatial heterogeneity of seagrass meadows when assessing the functioning of these ecosystems.
机译：海冰在亚帕罗尔海草草甸中起着重要作用。它保护草甸防止波浪动作和极端温度。另一方面，海冰摧毁了海草叶子并去除沉积物和有机物碎片的曲线，留下长时间的制冰池在草地上的各种形状和尺寸。本研究旨在调查海冰对副群落结构和生物地球化学过程的影响。从位于Manicouagan半岛的海草草甸（魁北克; 49度5'36'N，68度12，从2018年4月到2018年4月到2018年4月到2018年4月，植被地区（ATP）和自然（NTP）和自然（NTP）潮汐池。 '44''w）。 ATP和NTP显示出类似的沉积物特性，较粗糙的沉积物和较低的颗粒有机碳和总氮含量，而且与V.Benthic Macrofauna社区相比，NOx和较高的NH 4 +和PO43-沉皮水浓度相比表现出极度密度，生物质的总密度非常降低在冬季（从12月至4月）相对夏季（从6月至9月开始）的物种丰富。近距离近期宏过社区也比ATP和NTP更多样化和丰富。 ATP和NTP中的物种组合表示V中的物种组合子集，其中任何物种专用于潮汐池。然而，在处理中，总生物质相似，表明潮汐池避免了比植被区域更大的个体。这些结果强调了在评估这些生态系统的运作时考虑海草草甸的空间异质性的重要性。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2020年第30期|106898.1-106898.14|共14页
  • 作者

    Pascal Ludovic; Bernatchez Pascal; Chaillou Gwenaelle; Nozais Christian; Saint-Pierre Mathilde Lapointe; Archambault Philippe;

  • 作者单位

    Univ Quebec Rimouski Dept Biol Chim & Geog Res Chair Coastal Geosci Quebec Ocean 300 Allee Ursulines Rimouski PQ G5L 3A1 Canada|Univ Quebec Rimouski Inst Sci Mer Rimouski Canadian Res Chair Geochem Coastal Hydrogeosyst Quebec Ocean 310 Allee Ursulines Rimouski PQ G5L 3A1 Canada|Univ Laval Dept Biol Quebec Ocean 2325 Rue Univ Quebec City PQ G1V 0A6 Canada;

    Univ Quebec Rimouski Dept Biol Chim & Geog Res Chair Coastal Geosci Quebec Ocean 300 Allee Ursulines Rimouski PQ G5L 3A1 Canada;

    Univ Quebec Rimouski Inst Sci Mer Rimouski Canadian Res Chair Geochem Coastal Hydrogeosyst Quebec Ocean 310 Allee Ursulines Rimouski PQ G5L 3A1 Canada;

    Univ Quebec Rimouski Dept Biol Chim & Geog Quebec Ocean 300 Allee Ursulines Rimouski PQ G5L 3A1 Canada;

    Univ Quebec Rimouski Dept Biol Chim & Geog Res Chair Coastal Geosci Quebec Ocean 300 Allee Ursulines Rimouski PQ G5L 3A1 Canada;

    Univ Laval Dept Biol Quebec Ocean 2325 Rue Univ Quebec City PQ G1V 0A6 Canada;

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  • 正文语种 eng
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  • 关键词

    Biodiversity; Macrofauna; Biogeochemistry; Zostera marina; Subpolar environment; Tidal pools;

    机译：生物多样性;Macrofauna;生物地球化学;Zostera Marina;子质环境;潮汐池;

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