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首页> 外文期刊>Aquatic Sciences >Denitrification in a Laurentian Great Lakes coastal wetland invaded by hybrid cattail (Typha × glauca)
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Denitrification in a Laurentian Great Lakes coastal wetland invaded by hybrid cattail (Typha × glauca)

机译：混合香蒲入侵的劳伦山脉大湖沿岸湿地的反硝化作用（香蒲×高加索）

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摘要

Wetland ecosystems maintain and improve water quality through the process of denitrification, an increasingly important ecosystem service due to global N pollution. Invasive plants have the potential to disrupt denitrification by altering the environmental conditions that facilitate this process. Great Lakes coastal wetlands are experiencing widespread invasion by highly productive hybrid cattail with largely uncertain biogeochemical effects. Through field and controlled mesocosm studies, we sought to determine the effects of cattail invasion through time on denitrification rates and associated environmental factors in a Great Lakes coastal wetland. In the field, we found that cattail density correlated with increased denitrification and a suite of environmental and plant community characteristics and denitrification rates were positively correlated with NH_4~+, sediment organic matter, reduced water levels, and cattail stand age. Through our controlled mesocosm study, we documented conditions 1-and 5-year following invasion and found that denitrification rates and soil organic matter increased in year 5, and cattail and year-since-invasion altered plant communities and soil NH_4~+. Only a weak correlation between denitrification rates and cattail treatments was noted, however, owing to high replicate variability. Our results indicate that with increasing cattail residence time, one ecosystem service, biodiversity, was negatively impacted, while two other services, denitrification and sediment carbon accumulation, were enhanced. Thus, this highly invaded wetland still provides valuable services to aquatic ecosystems and to society. A holistic perspective is therefore critical when evaluating invasive species impacts in which negative impacts are weighed against other ecosystem services, which may be stimulated.
机译：湿地生态系统通过反硝化过程来维持和改善水质，反硝化过程由于全球氮污染而日益重要。入侵植物可能会通过改变促进该过程的环境条件来破坏反硝化作用。大湖沿岸湿地正遭受高产杂种香蒲的广泛入侵，其生物地球化学效应尚不确定。通过现场和受控的中观宇宙研究，我们试图确定香蒲随时间入侵对大湖沿岸湿地中反硝化率和相关环境因子的影响。在田间，我们发现香蒲密度与反硝化作用增加有关，并且一系列环境和植物群落特征以及反硝化率与NH_4〜+，沉积物有机质，水位降低和香蒲树龄正相关。通过我们受控的中观宇宙研究，我们记录了入侵后1年和5年的情况，发现在第5年反硝化率和土壤有机质增加，香蒲和自入侵以来改变了植物群落和土壤NH_4〜+。但是，由于高重复变异性，反硝化率与香蒲处理之间的相关性很弱。我们的结果表明，随着香蒲栖息时间的增加，一种生态系统服务即生物多样性受到负面影响，而其他两项服​​务（反硝化作用和沉积碳积聚）则得到增强。因此，这个高度入侵的湿地仍然为水生生态系统和社会提供了宝贵的服务。因此，在评估入侵物种影响与其他可能刺激的其他生态系统服务的权衡时，整体观点至关重要。

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  • 来源
    《Aquatic Sciences》 |2014年第4期|483-495|共13页
  • 作者

    Shane C. Lishawa; KathiJo Jankowski; Pamela Geddes; Daniel J. Larkin; Andrew M. Monks; Nancy C. Tuchman;

  • 作者单位

    Institute of Environmental Sustainability, Loyola University Chicago, Chicago, IL 60660, USA,University of Michigan Biological Station, Pellston, MI 49769, USA;

    Institute of Environmental Sustainability, Loyola University Chicago, Chicago, IL 60660, USA,School of Aquatic and Fishery Sciences, University of Washington, Seattle, WA 98195, USA;

    Institute of Environmental Sustainability, Loyola University Chicago, Chicago, IL 60660, USA,Department of Biology, Northeastern Illinois University, Chicago, IL 60625, USA;

    Institute of Environmental Sustainability, Loyola University Chicago, Chicago, IL 60660, USA,Chicago Botanic Garden, Plant Science and Conservation, Glencoe, IL 60022, USA;

    Institute of Environmental Sustainability, Loyola University Chicago, Chicago, IL 60660, USA,University of Michigan Biological Station, Pellston, MI 49769, USA;

    Institute of Environmental Sustainability, Loyola University Chicago, Chicago, IL 60660, USA,University of Michigan Biological Station, Pellston, MI 49769, USA;

  • 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

    Denitrification; Invasive species; Temporal; Aquatic macrophyte; Ecosystem service; Typha × glauca;

    机译：反硝化;入侵物种;颞;水生植物生态系统服务;香蒲×高加索;

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