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首页> 外文期刊>Aquatic Sciences >If Alpine streams run dry: the drought memory of benthic communities
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If Alpine streams run dry: the drought memory of benthic communities

机译：如果高山溪流干dry：底栖社区的干旱记忆

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摘要

Several mountain streams are currently changing from perennial to temporary regimesdue to increasing water abstraction and global climate change with expected detrimental effects on stream biodiversity and functionality. We here examined whether macroinvertebrates and diatoms, experiencing recurring non-flow periods, showed alterations even after complete flow resumption in 13 mountain streams in SW Italian Alps. Benthic communities were sampled after complete flow resumption in April 2017 in a control section, with permanent flow, and inan intermittent section, which experiences recurrent non-flow periods during summer, in each stream. We tested for differences in terms of taxonomic composition, diversity and functional groups between permanent and temporary sections. Our results showed a significant alteration of benthic invertebrate, but not diatom communities in temporary sections. Different species composition and low diversity values in temporary sections were due to the replacement of monovoltine taxa, with aquatic respiration, preferring medium to fast flowing, oligotrophic waters by plurivoltine taxa, with aerial respiration preferring lentic habitats. Such results provide some insights into the mechanisms by which non-flow periods impact Alpine streams, and further investigations in mountain areas are required in the future to better unravel the repercussions on stream ecosystem processes.
机译：由于不断增加的取水量和全球气候变化，对山区生物多样性和功能性产生了不利影响，一些山区河流目前正在从多年生方式变为临时方式。我们在这里检查了即使在意大利西南阿尔卑斯山脉的13条山溪中完全恢复流量之后，经历了反复的非流动期的大型无脊椎动物和硅藻是否也显示出变化。在2017年4月完全控制流量之后，在一个控制区域中对底栖生物进行采样，该区域具有永久流量，而在夏季，每个河流中都有一个间歇性区域，该区域在夏季经常出现非流动时期。我们测试了永久性和临时性部分之间在分类学组成，多样性和功能组方面的差异。我们的结果表明，底栖无脊椎动物发生了显着变化，但临时区域的硅藻群落却没有变化。临时区域内不同种类的物种组成和较低的多样性值是由于用水生呼吸取代了单伏类群，而多伏特类群偏爱中速至中速流动的贫营养水，而空中呼吸偏爱了透镜体生境。这样的结果为非流量期影响高山溪流的机理提供了一些见识，将来需要在山区进行进一步调查，以更好地阐明对溪流生态系统过程的影响。

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  • 来源
    《Aquatic Sciences》 |2019年第2期|32.1-32.14|共14页
  • 作者

    Piano Elena; Doretto Alberto; Falasco Elisa; Fenoglio Stefano; Gruppuso Laura; Nizzoli Daniele; Viaroli Pierluigi; Bona Francesca;

  • 作者单位

    Univ Piemonte Orientale, DISIT, Viale Teresa Michel 25, I-15121 Alessandria, Italy|Univ Turin, DBIOS, Via Accademia Albertina 13, I-10123 Turin, Italy;

    Univ Piemonte Orientale, DISIT, Viale Teresa Michel 25, I-15121 Alessandria, Italy|Univ Turin, DBIOS, Via Accademia Albertina 13, I-10123 Turin, Italy;

    Univ Piemonte Orientale, DISIT, Viale Teresa Michel 25, I-15121 Alessandria, Italy|Univ Turin, DBIOS, Via Accademia Albertina 13, I-10123 Turin, Italy;

    Univ Piemonte Orientale, DISIT, Viale Teresa Michel 25, I-15121 Alessandria, Italy;

    Univ Piemonte Orientale, DISIT, Viale Teresa Michel 25, I-15121 Alessandria, Italy|Univ Turin, DBIOS, Via Accademia Albertina 13, I-10123 Turin, Italy;

    Univ Parma, Dept Chem Life Sci & Environm Sustainabil, Parco Area Sci 11-A, I-43124 Parma, Italy;

    Univ Parma, Dept Chem Life Sci & Environm Sustainabil, Parco Area Sci 11-A, I-43124 Parma, Italy;

    Univ Turin, DBIOS, Via Accademia Albertina 13, I-10123 Turin, Italy;

  • 收录信息 美国《科学引文索引》(SCI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Diatoms; Macroinvertebrates; Hydrological intermittency; Functional traits;

    机译：硅藻;无脊椎动物;水文间歇性;功能性状;

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