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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Soil warming carbon-nitrogen interactions and forest carbon budgets
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Soil warming carbon-nitrogen interactions and forest carbon budgets

机译：土壤变暖碳氮相互作用与森林碳收支

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摘要

Soil warming has the potential to alter both soil and plant processes that affect carbon storage in forest ecosystems. We have quantified these effects in a large, long-term (7-y) soil-warming study in a deciduous forest in New England. Soil warming has resulted in carbon losses from the soil and stimulated carbon gains in the woody tissue of trees. The warming-enhanced decay of soil organic matter also released enough additional inorganic nitrogen into the soil solution to support the observed increases in plant carbon storage. Although soil warming has resulted in a cumulative net loss of carbon from a New England forest relative to a control area over the 7-y study, the annual net losses generally decreased over time as plant carbon storage increased. In the seventh year, warming-induced soil carbon losses were almost totally compensated for by plant carbon gains in response to warming. We attribute the plant gains primarily to warming-induced increases in nitrogen availability. This study underscores the importance of incorporating carbon-nitrogen interactions in atmosphere-ocean-land earth system models to accurately simulate land feedbacks to the climate system.
机译：土壤变暖有可能改变影响森林生态系统碳储存的土壤和植物过程。在新英格兰的落叶林中进行的一项大型长期（7年）土壤变暖研究中，我们已经量化了这些影响。土壤变暖导致土壤碳损失，并刺激树木木质组织中的碳增加。随着土壤有机质变暖的增加，土壤溶液中还释放了足够的额外无机氮，以支持植物碳储量的增加。尽管在7年的研究中，土壤变暖已导致新英格兰森林相对于控制区域的碳累积累积净损失，但随着植物碳存储量的增加，年净损失通常会随着时间的推移而减少。在第七年，变暖引起的土壤碳损失几乎完全由响应变暖的植物碳增加所补偿。我们把植物的生长主要归因于变暖引起的氮素利用率的增加。这项研究强调了将碳-氮相互作用纳入大气-海洋-陆地地球系统模型中以准确模拟土地对气候系统的反馈的重要性。

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  • 作者

    Jerry M. Melillo; Sarah Butler; Jennifer Johnson; Jacqueline Mohan; Paul Steudler; Heidi Lux; Elizabeth Burrows; Francis Bowles; Rose Smith; Lindsay Scott; Chelsea Vario; Troy Hill; Andrew Burton; Yu-Mei Zhou; Jim Tang;

  • 作者单位

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543,Biology Department, Stanford University, Palo Alto, CA 94305;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543,School of Ecology, University of Georgia, Athens, GA 30602;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543,Harvard Forest, Petersham, MA 02543;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543,Rutgers University, Piscataway, NJ 08901;

    Research Designs, Lyme,NH 03768;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543,Department of Biological Sciences, Dartmouth College, Hanover, NH 03755;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543,School of Forestry and Environmental Studies, Yale University, New Haven, CT 06511;

    School of Forest Resources and Environmental Science, Michigan Technological University, Houghton, Ml 49931;

    Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;

    The Ecosystem Center, Marine Biological Laboratory, Woods Hole, MA 02543;

  • 收录信息 美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    climate system feedbacks; ecological stoichiometry; forest carbon budget; forest nitrogen budget; global climate change;

    机译：气候系统反馈;生态化学计量森林碳预算;森林氮预算;全球气候变化;

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