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首页> 外文期刊>Estuarine Coastal and Shelf Science >Benthic biodiversity and ecological gradients in the Seno Magdalena (Puyuhuapi Fjord, Chile)
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Benthic biodiversity and ecological gradients in the Seno Magdalena (Puyuhuapi Fjord, Chile)

机译：塞诺·玛格达莱纳（智利普尤瓦比峡湾）的底栖生物多样性和生态梯度

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摘要

Due to its complex hydrological, geomorphological and climatic features, the Chilean fjords region is considered among the most productive areas of the world. The benthic fauna of this region accounts for more than 1600 species showing marked latitudinal biogeographic differences characterizing this as one of the most important hotspot of biodiversity of cold-temperate environments. Despite numerous studies have been conducted to depict the biological characteristics of the fjords, the present situation is strongly unbalanced towards specific taxa. Hence, this study takes into consideration a community approach, highlighting the distribution of six benthic assemblages thriving on vertical walls along the Seno Magdalena fjord (Aysen region). Underwater pictures were used to characterize the trends in abundance and diversity of the main taxa showing distinct responses to salinity and turbidity. Among the less tolerant taxa to high fresh water inputs there are encrusting algae, mainly found in the most external sites lashed by outer currents, far from the estuarine plume. The bathymetric zonation of the assemblages, instead, is characterized by a dense mussel belt in the first 10 m, within a thick layer of low salinity, nutrient-enriched waters. Rich assemblages of sponges, brachiopods, gorgonians and sderactinians thrive in deeper, marine, clear waters. The evaluation of the ecological role of benthic species leads both to the definition of potential bioindicator taxa responding to anthropic disturbances and to the promotion of protected areas. (C) 2017 Elsevier Ltd. All rights reserved.
机译：由于其复杂的水文，地貌和气候特征，智利峡湾地区被认为是世界上生产力最高的地区之一。该地区的底栖动物共有1600多个物种，显示出明显的纬度生物地理差异，这是寒带环境生物多样性最重要的热点之一。尽管已经进行了许多研究来描绘峡湾的生物学特性，但是目前的状况在特定分类群方面很不平衡。因此，本研究考虑了社区方法，强调了沿Seno Magdalena峡湾（艾森地区）的垂直墙上繁盛的六个底栖动物群落的分布。水下图片被用来描述主要分类单元的丰度和多样性趋势，显示出对盐度和浊度的独特响应。在对高淡水输入量不太宽容的类群中，有藻类结壳，主要存在于外流冲击的最外部位置，远离河口羽流。相反，这些组合的测深分区的特征是，在前10 m中，在盐分低，营养丰富的厚水层中形成了密集的贻贝带。丰富的海绵，腕足动物，食虫动物和Seractinian的组合在更深的海洋清澈的水中壮成长。对底栖生物的生态作用进行评估，既可以确定应对人类干扰的潜在生物指示生物分类，又可以促进保护区的发展。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Estuarine Coastal and Shelf Science》 |2017年第ptaa期|269-278|共10页
  • 作者

    Betti F.; Bavestrello G.; Bo M.; Enrichetti F.; Loi A.; Wanderlingh A.; Perez-Santos I.; Daneri G.;

  • 作者单位

    Univ Genoa, DISTAV, Corso Europa 26, I-16132 Genoa, Italy;

    Univ Genoa, DISTAV, Corso Europa 26, I-16132 Genoa, Italy;

    Univ Genoa, DISTAV, Corso Europa 26, I-16132 Genoa, Italy;

    Univ Genoa, DISTAV, Corso Europa 26, I-16132 Genoa, Italy;

    Univ Genoa, DISTAV, Corso Europa 26, I-16132 Genoa, Italy;

    Univ Genoa, DISTAV, Corso Europa 26, I-16132 Genoa, Italy;

    Univ Los Lagos, Ctr I Mar, Puerto Montt, Chile|Univ Concepcion, COPAS Sur Austral, Concepcion, Chile;

    Univ Concepcion, COPAS Sur Austral, Concepcion, Chile|CIEP, Calle Moraleda 16, Coyhaique, Chile;

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  • 正文语种 eng
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  • 关键词

    Benthos; Zonation; Patagonian fjords; Salinity; Turbidity; Chile;

    机译：Benthos;分区;巴塔哥尼亚峡湾;盐度;浊度;智利;

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