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Widespread but heterogeneous responses of Andean forests to climate change
Nature ( IF 64.8 ) Pub Date : 2018-11-14 , DOI: 10.1038/s41586-018-0715-9
Belén Fadrique 1 , Selene Báez 2, 3 , Álvaro Duque 4 , Agustina Malizia 5 , Cecilia Blundo 5 , Julieta Carilla 5 , Oriana Osinaga-Acosta 5 , Lucio Malizia 6 , Miles Silman 7 , William Farfán-Ríos 7, 8 , Yadvinder Malhi 9 , Kenneth R Young 10 , Francisco Cuesta C 3, 11 , Jurgen Homeier 12 , Manuel Peralvo 3 , Esteban Pinto 3 , Oswaldo Jadan 13 , Nikolay Aguirre 14 , Zhofre Aguirre 14 , Kenneth J Feeley 1, 15
Affiliation  

Global warming is forcing many species to shift their distributions upward, causing consequent changes in the compositions of species that occur at specific locations. This prediction remains largely untested for tropical trees. Here we show, using a database of nearly 200 Andean forest plot inventories spread across more than 33.5° latitude (from 26.8° S to 7.1° N) and 3,000-m elevation (from 360 to 3,360 m above sea level), that tropical and subtropical tree communities are experiencing directional shifts in composition towards having greater relative abundances of species from lower, warmer elevations. Although this phenomenon of ‘thermophilization’ is widespread throughout the Andes, the rates of compositional change are not uniform across elevations. The observed heterogeneity in thermophilization rates is probably because of different warming rates and/or the presence of specialized tree communities at ecotones (that is, at the transitions between distinct habitats, such as at the timberline or at the base of the cloud forest). Understanding the factors that determine the directions and rates of compositional changes will enable us to better predict, and potentially mitigate, the effects of climate change on tropical forests.With global warming, Andean forests are changing to include more trees of low-elevation, heat-loving species but rates of compositional change are not uniform across elevations and are insufficient to keep species in equilibrium with climate.

中文翻译:

安第斯森林对气候变化的广泛但异质的反应

全球变暖正迫使许多物种向上移动它们的分布,从而导致特定地点的物种组成发生变化。这一预测在很大程度上仍未针对热带树木进行测试。在这里,我们显示,使用分布在超过 33.5° 纬度(从 26.8° S 到 7.1° N)和 3,000 米海拔(从海拔 360 到 3,360 m)的近 200 个安第斯森林地块清单的数据库,热带和亚热带树木群落的组成正在发生方向性变化,从较低、较温暖的海拔处获得更大的物种相对丰度。尽管这种“嗜热”现象在整个安第斯山脉普遍存在,但不同海拔的成分变化率并不统一。观察到的嗜热率的异质性可能是因为不同的变暖率和/或在交错带(即不同栖息地之间的过渡处,例如在林线或云雾林底部)存在专门的树木群落。了解决定成分变化方向和速率的因素将使我们能够更好地预测并可能减轻气候变化对热带森林的影响。 - 喜爱物种,但不同海拔的组成变化率并不统一,不足以使物种与气候保持平衡。例如在林线或云雾林的底部)。了解决定成分变化方向和速率的因素将使我们能够更好地预测并可能减轻气候变化对热带森林的影响。 - 喜爱物种,但不同海拔的组成变化率并不统一,不足以使物种与气候保持平衡。例如在林线或云雾林的底部)。了解决定成分变化方向和速率的因素将使我们能够更好地预测并可能减轻气候变化对热带森林的影响。 - 喜爱物种,但不同海拔的组成变化率并不统一,不足以使物种与气候保持平衡。
更新日期:2018-11-14
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