Background climate determines the response of spring leaf-out to climate change—Results from a national-scale twig-cutting experiment

IF 5.6 1区 环境科学与生态学 Q1 ECOLOGY
Nan Wang, Zhaofei Wu, Yufeng Gong, Yishuo Cui, Yongshuo H. Fu
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Abstract

Abstract Image

背景气候决定了春季出叶对气候变化的响应——来自国家尺度的剪枝试验结果
近几十年来,全球变暖显著加快了春季落叶的流失,影响了陆地的碳和水循环。春季温度被认为是温带地区叶片脱落的主要驱动因素,受增温幅度和地区背景温度的影响。然而,由于缺乏大规模的实验证据,气候变暖如何与背景气候相互作用从而影响叶片脱落仍不清楚。在此,我们通过在中国17个地点采集银杏叶进行了多温度处理的大规模操纵实验,这些地点横跨纬度从25°N到40°N。我们发现,较高的温度显著提前了银杏叶的脱落,在冷却处理(7.8天/°C,即相对于背景温度较低的温度处理)下的温度敏感性高于加热处理(4.3天/°C,即相对于背景温度)下的温度敏感性。相对于背景温度更高的温度处理)。更重要的是,背景温度每升高1°C,叶片脱落期就会提前2.7天。通过将背景温度效应与未来变暖情景相结合,我们预测在高排放情景下,到21世纪末,中国银杏叶产量将平均提前19.7天,其中南方地区的变化更为明显。合成。我们的研究结果强调了气候变暖和背景温度在调节叶片脱落中的相互作用,这应该纳入物候模型,以提高我们对生态系统对气候变化的响应的理解。
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来源期刊
Journal of Ecology
Journal of Ecology 环境科学-生态学
CiteScore
10.90
自引率
5.50%
发文量
207
审稿时长
3.0 months
期刊介绍: Journal of Ecology publishes original research papers on all aspects of the ecology of plants (including algae), in both aquatic and terrestrial ecosystems. We do not publish papers concerned solely with cultivated plants and agricultural ecosystems. Studies of plant communities, populations or individual species are accepted, as well as studies of the interactions between plants and animals, fungi or bacteria, providing they focus on the ecology of the plants. We aim to bring important work using any ecological approach (including molecular techniques) to a wide international audience and therefore only publish papers with strong and ecological messages that advance our understanding of ecological principles.
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