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题名: Herbarium specimens show contrasting phenological responses to Himalayan climate
作者: Hart, Robbie1, 2; Salick, Jan2; Ranjitkar, Sailesh3, 4; null(许建初)3, 4
刊名: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
关键词: phenology ; global warming
英文摘要: Responses by flowering plants to climate change are complex and only beginning to be understood. Through analyses of 10,295 herbarium specimens of Himalayan Rhododendron collected by plant hunters and botanists since 1884, we were able to separate these responses into significant components. We found a lack of directional change in mean flowering time over the past 45 y of rapid warming. However, over the full 125 y of collections, mean flowering time shows a significant response to year-to-year changes in temperature, and this response varies with season of warming. Mean flowering advances with annual warming (2.27 d earlier per 1 degrees C warming), and also is delayed with fall warming (2.54 d later per 1 degrees C warming). Annual warming may advance flowering through positive effects on overwintering bud formation, whereas fall warming may delay flowering through an impact on chilling requirements. The lack of a directional response suggests that contrasting phenological responses to temperature changes may obscure temperature sensitivity in plants. By drawing on large collections from multiple herbaria, made over more than a century, we show how these data may inform studies even of remote localities, and we highlight the increasing value of these and other natural history collections in understanding long-term change.
出版日期: 2014-07-22
卷号: 111, 期号:29, 页码:10615-10619
DOI标识: 10.1073/pnas.1403376111
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/151853/18301
Appears in Collections:资源植物与生物技术所级重点实验室_期刊论文

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作者单位: 1.Univ Missouri, Dept Biol, St Louis, MO 63121 USA
2.Missouri Bot Garden, William L Brown Ctr, St Louis, MO 63166 USA
3.Chinese Acad Sci, Kunming Inst Bot, Key Lab Plant Divers & Biogeog East Asia, Kunming 650204, Peoples R China
4.World Agroforestry Ctr, Kunming 650204, Peoples R China

Recommended Citation:
Hart,Robbie;Salick,Jan;Ranjitkar,Sailesh;Xu,Jianchu.Herbarium specimens show contrasting phenological responses to Himalayan climate,PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA,2014,111(29):10615-10619
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