Response of chestnut phenology in China to climate variation and change
Response of chestnut phenology in China to climate variation and change
复制标题
中国板栗物候对气候变迁的响应
DOI：
10.1016/j.agrformet.2013.06.004
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发表时间：
2013-10-15
影响因子：
6.2
通讯作者：
Luedeling, Eike
中科院分区：
文献类型：
--
作者：
Guo, Liang;Dai, Junhu;Luedeling, Eike
气候变化影响了世界各地动植物的物候，但很少有研究评估东亚果树的气候响应。特别是，尚未探讨树木物候对一年中不同时期变暖的响应。我们评估了中国北京板栗（Castanea mollissima Blume）首次开花、叶色和生长季节长度的长期记录（1963-2008）。使用偏最小二乘 (PLS) 回归，将物候日期与各事件发生前 12 个月的每日气温（遵循 11 天的运行平均值）相关。对于每个物候指标，回归结果确定了两个相关阶段，在此期间温度与事件发生时间或生长季节长度相关。在记录期间，北京的首次开花日期每十年提前 1.6 天，而叶子颜色没有表现出明显的趋势。生长季节每十年延长 4.3 天。 1 月至 6 月期间的高温使首次开花提前，但在寒冷积累阶段（10 月下旬至 1 月初）因温暖条件而推迟。在生长季节的大部分时间里，温暖的条件使叶子着色提前，但在秋季的高温下推迟了叶子的着色。生长季节长度的变化与春季物候的变化密切相关。板栗的所有物候指标似乎都对生长季节某些时段的高温做出反应，其方式与目前的主导效应相反。例如，寒冷积累期间的变暖推迟而不是提前了春季物候。这些次生温度反应可以解释某些植物和生态系统的反应，这些反应与提前春季和延迟秋季阶段的总体趋势不相符。随着变暖的持续，这些影响的重要性似乎可能会增加。 (C) 2013 Elsevier B.V. 保留所有权利。
Climate change has affected the phenology of plants and animals throughout the world, but few studies have evaluated climate responses of fruit trees in East Asia. In particular, the response of tree phenology to warming during different parts of the year has not been explored. We evaluated long-term records (1963-2008) of chestnut (Castanea mollissima Blume) first flowering, leaf coloring and length of the growing season from Beijing, China. Phenological dates were related with daily temperatures (subjected to an 11-day running mean) for the 12 months leading up to the respective events, using Partial Least Squares (PLS) regression. For each phenological indicator, regression results identified two relevant phases, during which temperatures were correlated with event timing or growing season length.First flowering dates in Beijing advanced by 1.6 days per decade over the length of the record, whereas leaf coloring showed no significant trend. The growing season expanded by 4.3 days per decade. First flowering was advanced by high temperatures between January and June, but delayed by warm conditions during the chill accumulation phase (late October through early January). Leaf coloring was advanced by warm conditions during most of the growing season, but delayed by high temperatures in fall. Variation in the length of the growing season was strongly correlated to variation in spring phenology.All phenological indicators of chestnut appeared to respond to high temperatures during certain parts of the growing season in a way that ran counter to currently dominant effects. For instance, warming during the period of chill accumulation delayed rather than advanced spring phenology. These secondary temperature responses may explain responses of certain plants and ecosystems that are not in line with general trends of advanced spring and delayed fall phases. It seems possible that the importance of these effects may increase as warming continues. (C) 2013 Elsevier B.V. All rights reserved.