Reduced geographical variability in spring phenology of temperate trees with recent warming
Reduced geographical variability in spring phenology of temperate trees with recent warming
复制标题
随着近期变暖，温带树木春季物候的地理变异性减少
DOI：
10.1016/j.agrformet.2018.04.012
复制
发表时间：
2018-06-15
影响因子：
6.2
通讯作者：
Berninger, Frank
中科院分区：
文献类型：
--
作者：
Ma, Qianqian;Huang, Jian-Guo;Berninger, Frank
随着近年来气候变暖，广泛地理区域内种群间物种特异性物候时间的发生可能趋同或分化。物候时间空间地理变异的变化可能影响物种重叠程度，从而在全球变化的背景下产生深远的生态影响。尽管在过去的几十年里，由于气候变暖，春季物候学在全球范围内取得了进展，但人们对其趋同或分化的可能性知之甚少。本文通过分析欧洲16种温带树种22个春季语音学事件（包括叶片脱落和开花物候）的地理变异的时间变化来解决这个问题。结果表明，1980—2013年春季物候时间的种间地理变异性呈下降趋势，表明在较大地理区域内种群间物候差异呈下降趋势。地理变异的减小主要是由于寒冷地点的种群比温暖地点的种群具有更高的推进率和对温度升高的响应。气候变暖导致的温带树木春季音系趋同可能通过营养失配影响食物链中其他物种的活动，并最终影响由食物链功能驱动的生态系统碳和养分循环。
The occurrence of species-specific phenological timing among populations over broad geographical areas may have converged or diverged with recent climatic warming. The changes in spatial geographical variability of phenological timing may affect the degree of species overlap, and thus have profound ecological consequences in the context of global change. The potential converging or diverging has been little explored, although advancements of spring phenology due to climate warming have been observed worldwide in the last decades. Here we addressed this question through analyzing temporal changes in the geographical variability for 22 spring phonological events (both leaf-out and flowering phenology) of 16 temperate tree species in Europe. We found that the species-specific geographical variability of spring phenological timing decreased during 1980-2013, indicating that phenological differences among populations over a large geographical area decreased. The reduced geographical variability is mainly due to the fact that populations in cold sites had higher advancement rates and exhibited stronger responses to elevated temperature than those in warm sites. Warming induced convergence of spring phonology in temperate trees over a large geographical area may affect the activities of other species in the food chain through trophic mismatch, and may ultimately affect the ecosystem carbon and nutrient cycles that are driven through functioning of the food chain.