Emergent freeze and fire disturbance dynamics in temperate rainforests
Emergent freeze and fire disturbance dynamics in temperate rainforests
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DOI：
10.1111/aec.12751
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发表时间：
2019-08
期刊：
影响因子：
1.5
通讯作者：
B. Buma;E. Batllori;S. Bisbing;A. Holz;S. Saunders;A. Bidlack;Megan K. Creutzburg;D. DellaSala;D. Gregovich;P. Hennon;J. Krapek;M. Moritz;Kyla Zaret
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文献类型：
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作者：
B. Buma;E. Batllori;S. Bisbing;A. Holz;S. Saunders;A. Bidlack;Megan K. Creutzburg;D. DellaSala;D. Gregovich;P. Hennon;J. Krapek;M. Moritz;Kyla Zaret
南美洲和北美洲的沿海温带雨林是地球上生物量最密集的森林生物群系的一部分。它们还受到快速气候变化以及随后的新的干扰过程的影响——积雪损失导致的死亡率以及在历史上未发生火灾的地区出现火灾。在这里，我们通过综合当前文献、未来气候预期和新的全球火灾模型，比较和对比了美洲的南半球和北半球沿海温带雨林，这两个最大的生物群落的例子。在积雪损失方面，冬季积雪的迅速减少导致北半球热带雨林中某些针叶树物种大量死亡。南半球的高海拔森林也开始出现类似的降雪量下降，未来可能会变得脆弱，尤其是沼泽和高含水量土壤。在南半球的森林中，火灾正在成为中高纬度地区的一种生态力量，这种变化在北方尚未观察到，但随着气候的持续变化，这种变化可能会变得更加突出。我们建议研究应集中在未来气候情景下这两个地区的几种植被和沼泽的可燃性。通过比较南北半球相似梯度的这两种变化驱动因素，这项工作指出了在这两个地区意想不到的地方出现变化的可能性。将美洲沿海温带雨林作为生物群系的两个例子进行概念化显然是有益的，因为每个地区的变化方向相似，但速度不同。西班牙语摘要可通过在线材料获得。在网上可以找到西班牙语的资料。
The coastal temperate rainforests of South and North America are part of the most biomass dense forest biome on the planet. They are also subject to rapid climatic shifts and, subsequently, new disturbance processes – snow loss-driven mortality and the emergence of fire in historically non-fire-exposed areas. Here, we compare and contrast Southern and Northern Hemisphere coastal temperate rainforests of the Americas, two of the largest examples of the biome, via synthesis of current literature, future climate expectations and new downscaling of a global fire model. In terms of snow loss, a rapid decline in winter snow is leading to mass mortality of certain conifer species in the Northern Hemisphere rainforests. High-elevation Southern Hemisphere forests, which are beginning to see similar declines in snow, may be vulnerable in the future, especially bogs and high-water content soils. Southern Hemisphere forests are seeing the invasion of fire as an ecological force at mid-to-high latitudes, a shift not yet observed in the north but which may become more prominent with ongoing climate change. We suggest that research should focus on the flammability of seral vegetation and bogs under future climate scenarios in both regions. By comparing these two drivers of change across similar gradients in the Northern and Southern Hemispheres, this work points to the potential for emerging change in unexpected places in both regions. There is a clear benefit to conceptualising the coastal temperate rainforests of the Americas as two examples of the biome which can inform the other, as change is proceeding in similar directions but at different rates in each region. Abstract in Spanish is available with online material.in Spanish is available with online material.