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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Tropical cloud forest climate variability and the demise of the Monteverde golden toad
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Tropical cloud forest climate variability and the demise of the Monteverde golden toad

机译：热带云雾森林气候变异性与蒙特维德金蟾蜍的灭亡

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摘要

Widespread amphibian extinctions in the mountains of the American tropics have been blamed on the interaction of anthropogenic climate change and a lethal pathogen. However, limited meteorological records make it difficult to conclude whether current climate conditions at these sites are actually exceptional in the context of natural variability. We use stable oxygen isotope measurements from trees without annual rings to reconstruct a century of hydroclimatology in the Monteverde Cloud Forest of Costa Rica. High-resolution measurements reveal coherent isotope cycles that provide annual chronological control and paleoclimate information. Climate variability is dominated by interannual variance in dry season moisture associated with El Nino Southern Oscillation events. There is no evidence of a trend associated with global warming. Rather, the extinction of the Monteverde golden toad (Bufo periglenes) appears to have coincided with an exceptionally dry interval caused by the 1986-1987 El Nino event.
机译：人类热带气候变化和致病性致病菌之间的相互作用被归咎于美洲热带地区两栖动物的广泛灭绝。但是，由于气象记录有限，因此很难断定这些地点的当前气候条件在自然多变性的情况下是否真的是例外。我们使用无年轮的树木​​中稳定的氧同位素测量值来重建哥斯达黎加蒙特维德云森林的百年水文气候学。高分辨率测量揭示了相干的同位素循环，这些循环可提供年度时序控制和古气候信息。气候变化主要由与厄尔尼诺南部涛动事件有关的旱季水分的年际变化决定。没有证据表明全球变暖的趋势。相反，Monteverde金蟾蜍（Bufo perglenes）的灭绝似乎与由1986-1987年El Nino事件引起的异常干燥间隔相吻合。

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  • 作者

    Kevin J. Anchukaitis; Michael N. Evans;

  • 作者单位

    Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964 Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ 85721;

    rnLamont-Doherty Earth Observatory of Columbia University, Palisades, NY 10964 Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ 85721 Department of Geology & Earth System Science Interdisciplinary Center, University of Maryland, College Park, MD 20740;

  • 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

    costa rica; ENSO; extinction; stable isotopes;

    机译：哥斯达黎加;ENSO;灭绝稳定同位素;

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