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首页> 外文期刊>Flora >Slowest to fastest: Extreme range in lichen growth rates supports their use as an indicator of climate change in Antarctica
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Slowest to fastest: Extreme range in lichen growth rates supports their use as an indicator of climate change in Antarctica

机译：最快到最快：地衣增长率的极端范围支持将其用作南极洲气候变化的指标

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摘要

Global temperature rise is suggested to be greater and more rapid in polar regions. There has been a clear temperature rise of 0.056 degrees C y(-1) in the Antarctic Peninsula and this has led to changes in higher plant extent and range. In the more extreme environments of the main continent the vegetation is scattered and composed of lichens and mosses. There is interest in the possible effects of global climate change on these communities acting through changes in temperature and precipitation. Lichens have been extensively used to date the substrates on which they are growing using the techniques of lichenometry. The slow growth and longevity of lichens particularly suites them for this use. We present evidence that there appears to be a substantial (two orders of magnitude) cline in lichen growth rate from the warmer, wetter and more productive Peninsula to the cold Dry Valleys at 77 degrees S latitude. The differences in growth rate reflect the precipitation and temperature regimes at the different sites. The large range in growth rates coupled with the simplicity of measuring lichen growth using modern techniques suggests that this could be an excellent tool for the detection of climate change in continental Antarctica. (C) 2007 Elsevier GmbH. All rights reserved.
机译：建议全球温度升高在极地地区更大，更快。南极半岛的温度明显上升了0.056 C y（-1），这导致了更高的植物范围和范围的变化。在主要大陆的更极端环境中，植被分散并且由地衣和苔藓组成。人们对全球气候变化可能通过温度和降水变化对这些社区造成的影响产生兴趣。地衣已被广泛用于使用地衣测定技术对在其上生长的基质进行年代测定。地衣生长缓慢且寿命长，尤其适合这种用途。我们提供的证据表明，从纬度更高，更湿润，生产力更高的半岛到南纬77度的寒冷干旱谷，地衣的生长率似乎存在着很大的上升趋势（两个数量级）。增长率的差异反映了不同地点的降水和温度状况。增长率范围大，再加上使用现代技术测量地衣生长的简便性，表明这可能是检测南极大陆气候变化的绝佳工具。 （C）2007 Elsevier GmbH。版权所有。

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