Extreme winter warm event causes exceptionally early bud break for many woody species
Extreme winter warm event causes exceptionally early bud break for many woody species
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DOI：
10.1002/ecs2.2542
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发表时间：
2019
期刊：
影响因子：
2.7
通讯作者：
Laura M. Ladwig;Jennifer L. Chandler;P. Guiden;Jonathan J. Henn
中科院分区：
文献类型：
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作者：
Laura M. Ladwig;Jennifer L. Chandler;P. Guiden;Jonathan J. Henn
在许多生态系统中，冬季的气候变化比其他季节更快。然而，我们缺乏关于许多物种对冬季气候变化，包括极端温暖事件的反应的基本信息。极端温暖事件可能在冬季结束时产生特别强烈的影响，当一些物种开始打破休眠时，冻结的风险仍然很高。在这里，我们监测了101个温带木本植物的芽爆发后，在冬季的极端温暖事件，调查物种的反应，这一异常事件，并确定是否功能性状预测物种的反应。经过连续6天的极端温暖的温度在冬季，近一半的被调查的树木和灌木物种有一个先进的阶段的芽物候。响应物种最有可能是不耐阴，遗传相关，并有较弱的休眠要求。根据该地区已建立的物种对春季温度的反应阈值，预计今年年初物种对温暖的温度不敏感，但许多物种打破了休眠。物种对这种极端冬季温暖事件的反应突出了气候变化如何改变已经建立的物种-气候关联。在一个气候变化日益加剧的时代，创造了新的冬季条件，需要持续监测长期和极端事件之后的情况，以了解新物种-
In many ecosystems, climate is changing faster during winter compared to other seasons. However, we lack basic information about the responses of many species to winter climate change, including extreme warm events. Extreme warm events may have particularly strong influences at the end of winter, when some species begin to break dormancy while the risk of freezing remains high. Here, we monitored bud burst of 101 temperate woody species following an extreme warm event during winter to investigate species responses to this anomalous event and determine whether functional traits predicted species responses. Following six consecutive days of extreme warm temperatures in winter, nearly half the surveyed tree and shrub species had an advanced stage of bud phenology. Responding species were most likely to be shade-intolerant, phylogenetically related, and have weaker dormancy requirements. Based on established species response thresholds to spring temperatures in the region, species were expected to be unresponsive to warm temperatures this early in the year, yet many species broke dormancy. Species responses to this extreme winter warm event highlighted how climate change can alter well-established species–climate associations. In an era of increasing climate change creating novel winter conditions, continued monitoring both long-term and following extreme events is needed to understand new species–