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首页> 外文期刊>Environmental Science & Technology >Plant-Soil Distribution of Potentially Toxic Elements in Response to Elevated Atmospheric CO_2
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Plant-Soil Distribution of Potentially Toxic Elements in Response to Elevated Atmospheric CO_2

机译：大气CO_2升高对潜在有毒元素的植物-土壤分布的影响

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摘要

The distribution of contaminant elements within ecosystems is an environmental concern because of these elements' potential toxicity to animals and plants and their ability to hinder microbial ecosystem services. As with nutrients, contaminants are cycled within and through ecosystems. Elevated atmospheric CO_2 generally increases plant productivity and alters nutrient element cycling, but whether CO_2 causes similar effects on the cycling of contaminant elements is unknown. Here we show that 11 years of experimental CO_2 enrichment in a sandy soil with low organic matter content causes plants to accumulate contaminants in plant biomass, with declines in the extractable contaminant element pools in surface soils. These results indicate that CO_2 alters the distribution of contaminant elements in ecosystems, with plant element accumulation and declining soil availability both likely explained by the CO_2 stimulation of plant biomass. Our results highlight the interdependence of element cycles and the importance of taking a broad view of the periodic table when the effects of global environmental change on ecosystem biogeochemistry are considered.
机译：污染物元素在生态系统中的分布是一个环境问题，因为这些元素对动植物具有潜在的毒性以及它们阻碍微生物生态系统服务的能力。与养分一样，污染物在生态系统内和通过生态系统循环。升高的大气CO_2通常会提高植物的生产力并改变营养元素的循环，但是尚不清楚CO_2是否对污染物元素的循环产生类似的影响。在这里，我们表明，在有机物含量低的沙质土壤中进行11年的实验性CO_2富集会导致植物在植物生物量中积累污染物，而表层土壤中的可提取污染物元素库却减少了。这些结果表明，CO_2改变了生态系统中污染物的分布，其中植物元素的积累和土壤利用率的下降都可能由CO_2刺激植物生物量引起。我们的结果突出了元素循环的相互依赖性，以及在考虑全球环境变化对生态系统生物地球化学的影响时，必须对元素周期表进行广泛观察的重要性。

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  • 来源
    《Environmental Science & Technology》 |2011年第7期|p.2570-2574|共5页
  • 作者

    Benjamin D. Duval; Paul Dijkstra; Susan M. Natali; J. Patrick Megonigal; Michael E. Ketterer; Bert G. Drake; Manuel T. Lerdau; Gwyneth Gordon; Ariel D. Anbar; Bruce A. Hungate;

  • 作者单位

    Department of Biological Sciences and Merriam-Powell Center for Environmental Research Biochemistry, Northern Arizona University, Flagstaff, Arizona 86011, United States;

    Department of Biological Sciences and Merriam-Powell Center for Environmental Research Biochemistry, Northern Arizona University, Flagstaff, Arizona 86011, United States;

    Department of Biology, University of Florida, Gainesville, Florida 32611, United States;

    Smithsonian Environmental Research Center, Edgewater, Maryland 21037, United States;

    Department of Chemistry and Biochemistry, Northern Arizona University, Flagstaff, Arizona 86011, United States;

    Smithsonian Environmental Research Center, Edgewater, Maryland 21037, United States;

    Department of Environmental Sciences, University of Virginia, Charlottesville, Virginia 22904, United States;

    School of Earth and Space Exploration, Arizona State University, Tempe, Arizona 85287, United States;

    School of Earth and Space Exploration, Arizona State University, Tempe, Arizona 85287, United States;

    Department of Biological Sciences and Merriam-Powell Center for Environmental Research Biochemistry, Northern Arizona University, Flagstaff, Arizona 86011, United States;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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