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首页> 外文期刊>Aquatic Sciences >Contrasts among macrophyte riparian species in their use of stream water nitrate and ammonium: insights from ~(15)N natural abundance
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Contrasts among macrophyte riparian species in their use of stream water nitrate and ammonium: insights from ~(15)N natural abundance

机译：大型植物河岸物种在使用水流硝酸盐和铵盐中的对比：〜（15）N自然丰度的见解

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摘要

We examined the relevance of dissolved inorganic nitrogen (DIN) forms (nitrate and ammonium) in stream water as N sources for different macrophyte species. To do this, we investigated the variability and relationships between ~(15)N natural abundance of DIN forms and of four different macrophyte species in five different streams influenced by inputs from wastewater treatment plants and over time within one of these streams. Results showed that ~(15)N signatures were similar in species of submersed and amphibious macrophytes and in stream water DIN, whereas ~(15)N signatures of the riparian species were not. ~(15)N signatures of macrophytes were generally closer to ~(15)N signatures of nitrate, regardless of the species considered. Our results showed significant relationships between ~(15)N signatures of DIN and those of submersed Callitriche stagnalis and amphibious Veronica beccabunga and Apium nodiflorum, suggesting stream water DIN as a relevant N source for these two functional groups. Moreover, results from a mixing model suggested that stream water DIN taken up by the submersed and amphibious species was mostly in the form of nitrate. Together, these results suggest different contribution to in-stream N uptake among the spatially-segregated species of macrophytes. While submersed and amphibious species can contribute to in-stream N uptake by assimilation of DIN, macrophyte species located at stream channel edges do not seem to rely on stream water DIN as an N source. Ultimately, these results add a functional dimension to the current use of macrophytes for the restoration of stream channel morphology, indicating that they can also contribute to reduce excess DIN in streams.
机译：我们研究了溪流水中溶解的无机氮（DIN）形式（硝酸盐和铵盐）作为不同大型植物物种的N源的相关性。为此，我们研究了五种不同流中，DIN形式的〜（15）N自然丰度与四种不同的大型植物物种之间的变异性和相互关系，其中五种不同的流受废水处理厂的投入以及其中一种流中的时间的影响。结果表明，在水下和两栖大型植物的物种和水生DIN中，〜（15）N的特征相似，而河岸物种的〜（15）N的特征却不相似。无论考虑什么物种，大型植物的〜（15）N特征通常更接近硝酸盐的〜（15）N特征。我们的结果表明，DIN的〜（15）N标记与淹没的Callitriche stagnalis和两栖维罗尼卡beccabunga和Apium nodiflorum的标记之间存在显着关系，表明溪水DIN作为这两个官能团的相关N源。此外，混合模型的结果表明，被淹没的两栖物种吸收的水流DIN主要为硝酸盐形式。总之，这些结果表明，在空间上分离的大型植物物种中，对氮吸收的贡献不同。虽然淹没的和两栖的物种可以通过同化DIN来促进河流中N的吸收，但位于河流通道边缘的大型植物物种似乎并不依赖于河流中的DIN水作为N源。最终，这些结果为目前使用大型植物恢复河流通道形态增加了功能层面，表明它们也可以有助于减少河流中过量的DIN。

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  • 来源
    《Aquatic Sciences》 |2014年第2期|203-215|共13页
  • 作者

    Marc Peipoch; Esperanca Gacia; Alba Blesa; Miquel Ribot; Joan L. Riera; Eugenia Marti;

  • 作者单位

    Integrative Freshwater Ecology Group, Centre d'Estudis Avancats de Blanes, Consejo Superior de Investigaciones Cientificas (CEAB-CSIC), Acces a la Cala Sant Francesc 14, 17300 Blanes, Girona, Spain;

    Integrative Freshwater Ecology Group, Centre d'Estudis Avancats de Blanes, Consejo Superior de Investigaciones Cientificas (CEAB-CSIC), Acces a la Cala Sant Francesc 14, 17300 Blanes, Girona, Spain;

    Consejo Superior de Investigaciones Cientfficas, Center of Molecular Biology 'Severe Ochoa', Autonomous University of Madrid, C/Nicolas Cabrera 1, Campus de la Universidad Autonoma de Madrid, 28049 Madrid, Spain;

    Integrative Freshwater Ecology Group, Centre d'Estudis Avancats de Blanes, Consejo Superior de Investigaciones Cientificas (CEAB-CSIC), Acces a la Cala Sant Francesc 14, 17300 Blanes, Girona, Spain;

    Department of Ecology, University of Barcelona (UB), Diagonal 643, 08028 Barcelona, Spain;

    Integrative Freshwater Ecology Group, Centre d'Estudis Avancats de Blanes, Consejo Superior de Investigaciones Cientificas (CEAB-CSIC), Acces a la Cala Sant Francesc 14, 17300 Blanes, Girona, Spain;

  • 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

    Macrophyte; Streams; Stable isotopes; Nitrogen; Stream restoration;

    机译：大型植物;溪流;稳定同位素;氮;流恢复;

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