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Global metabolic impacts of recent climate warming

机译：最近气候变暖对全球新陈代谢的影响

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摘要

Documented shifts in geographical ranges, seasonal phenology, community interactions, genetics and extinctions have been attributed to recent global warming. Many such biotic shifts have been detected at mid- to high latitudes in the Northern Hemisphere-a latitudinal pattern that is expected because warming is fastest in these regions. In contrast, shifts in tropical regions are expected to be less marked because warming is less pronounced there. However, biotic impacts of warming are mediated through physiology, and metabolic rate, which is a fundamental measure of physiological activity and ecological impact, increases exponentially rather than linearly with temperature in ectotherms. Therefore, tropical ectotherms (with warm baseline temperatures) should experience larger absolute shifts in metabolic rate than the magnitude of tropical temperature change itself would suggest, but the impact of climate warming on metabolic rate has never been quantified on a global scale. Here we show that estimated changes in terrestrial metabolic rates in the tropics are large, are equivalent in magnitude to those in the north temperate-zone regions, and are in fact far greater than those in the Arctic, even though tropical temperature change has been relatively small. Because of temperature's nonlinear effects on metabolism, tropical organisms, which constitute much of Earth's biodiversity, should be profoundly affected by recent and projected climate warming.
机译：地理范围，季节性物候，社区相互作用，遗传和灭绝的文献记载的变化归因于最近的全球变暖。在北半球的中高纬度地区已经发现了许多这样的生物变化，这是一种经纬度模式，因为在这些地区升温最快。相反，热带地区的变迁预计不会那么明显，因为那里的变暖不太明显。但是，变暖的生物影响是通过生理学来介导的，而代谢率是生理活动和生态影响的基本指标，它随着温度的升高呈指数增长，而不是随温度呈线性增长。因此，热带等温线（基线温度较高）的代谢速率绝对变化应大于热带温度变化本身所暗示的幅度，但从未在全球范围内量化气候变暖对代谢速率的影响。在这里，我们表明，热带地区陆地代谢速率的估计变化很大，与北部温带地区的幅度相当，并且尽管热带温度变化相对较大，但实际上远远大于北极地区。小。由于温度对新陈代谢的非线性影响，构成地球生物多样性大部分的热带生物应受到近期和预计气候变暖的深刻影响。

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  • 来源
    《Nature》 |2010年第7316期|P.704-706ⅲ|共4页
  • 作者

    Michael E. Dillon; George Wang; Raymond B. Huey;

  • 作者单位

    Department of Zoology and Physiology, University of Wyoming, La ramie, Wyoming82071, USA;

    rnDepartmentof Biology, Box 351800, University of Washington, Seattle, Washington 98195, USA Max Planck Institute for Developmental Biology, Tubingen 72076, Germany;

    rnDepartmentof Biology, Box 351800, University of Washington, Seattle, Washington 98195, USA;

  • 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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  • 正文语种 eng
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