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题名: Winter and spring warming result in delayed spring phenology on the Tibetan Plateau
作者: Yu, Haiying1, 2; Luedeling, Eike3; null(许建初)1, 2
刊名: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
关键词: CLIMATE-CHANGE ; VEGETATION INDEX ; TREE PHENOLOGY ; SNOW DEPTH ; AVHRR ; VARIABILITY ; LATITUDES ; REGIONS ; EUROPE ; CHINA
英文摘要: Climate change has caused advances in spring phases of many plant species. Theoretically, however, strong warming in winter could slow the fulfillment of chilling requirements, which may delay spring phenology. This phenomenon should be particularly pronounced in regions that are experiencing rapid temperature increases and are characterized by highly temperature-responsive vegetation. To test this hypothesis, we used the Normalized Difference Vegetation Index ratio method to determine the beginning, end, and length of the growing season of meadow and steppe vegetation of the Tibetan Plateau in Western China between 1982 and 2006. We then correlated observed phenological dates with monthly temperatures for the entire period on record. For both vegetation types, spring phenology initially advanced, but started retreating in the mid-1990s in spite of continued warming. Together with an advancing end of the growing season for steppe vegetation, this led to a shortening of the growing period. Partial least-squares regression indicated that temperatures in both winter and spring had strong effects on spring phenology. Although warm springs led to an advance of the growing season, warm conditions in winter caused a delay of the spring phases. This delay appeared to be related to later fulfillment of chilling requirements. Because most plants from temperate and cold climates experience a period of dormancy in winter, it seems likely that similar effects occur in other environments. Continued warming may strengthen this effect and attenuate or even reverse the advancing trend in spring phenology that has dominated climate-change responses of plants thus far.
出版日期: 2010-12-21
卷号: 107, 期号:51, 页码:22151-22156
语种: 英语
收录类别: SCI
学科分类: Multidisciplinary Sciences
ISSN号: 0027-8424
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.kib.ac.cn/handle/151853/3114
Appears in Collections:中国科学院东亚植物多样性与生物地理学重点实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Kunming Inst Bot, Key Lab Biodivers & Biogeog, Kunming 650204, Peoples R China
2.World Agroforestry Ctr, E Asia Program, Kunming 650204, Peoples R China
3.World Agroforestry Ctr, Nairobi 00100, Kenya

Recommended Citation:
Yu, HY; Luedeling, E; Xu, JC.Winter and spring warming result in delayed spring phenology on the Tibetan Plateau,PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2010,107(51):22151-22156
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