气候变化领域集成服务门户(CCPortal): Herbarium specimens show contrasting phenological responses to Himalayan climate

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DOI	10.1073/pnas.1403376111
	Herbarium specimens show contrasting phenological responses to Himalayan climate
	Hart R.; Salick J.; Ranjitkar S.; Xu J.
发表日期	2014
ISSN	0027-8424
起始页码	10615
结束页码	10619
卷号	111 期号:29
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°C warming), and also is delayed with fall warming (2.54 d later per 1°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.
英文关键词	Global warming; Phenology
语种	英语
scopus关键词	article; budding; China; climate; climate change; controlled study; flowering; nonhuman; overwintering; phenology; plant response; priority journal; Rhododendron; Rhododendron adenogynum; Rhododendron anthosphaerum; Rhododendron balfourianum; Rhododendron beesianum; Rhododendron bureavii; Rhododendron cephalanthum; Rhododendron cuneatum; Rhododendron decorum; Rhododendron delavayi; Rhododendron edgeworthii; Rhododendron fastigiatum; Rhododendron heliolepis; Rhododendron hippophaeoides; Rhododendron impeditum; Rhododendron irroratum; Rhododendron lepidotum; Rhododendron oreotrephes; Rhododendron phaeochrysum; Rhododendron primuliflorum; Rhododendron racemosum; Rhododendron rex; Rhododendron rubiginosum; Rhododendron rupicola; Rhododendron saluenense; Rhododendron uvariifolium; Rhododendron virgatum; Rhododendron yunnanense; separation technique; temperature sensitivity; warming; global warming; phenology; Climate; Ecosystem; Flowers; Rhododendron; Temperature; Time Factors
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159106
作者单位	Hart, R., Department of Biology, University of Missouri -St. Louis, St. Louis, MO 63121, United States, William L. Brown Center, Missouri Botanical Garden, St. Louis, MO 63166, United States; Salick, J., William L. Brown Center, Missouri Botanical Garden, St. Louis, MO 63166, United States; Ranjitkar, S., Key Laboratory of Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China, World Agroforestry Centre, East and Central Asia, Kunming 650204, China; Xu, J., Key Laboratory of Plant Diversity and Biogeography of East Asia, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China, World Agroforestry Centre, East and Central Asia, Kunming 650204, China
推荐引用方式 GB/T 7714	Hart R.,Salick J.,Ranjitkar S.,et al. Herbarium specimens show contrasting phenological responses to Himalayan climate[J],2014,111(29).
APA	Hart R.,Salick J.,Ranjitkar S.,&Xu J..(2014).Herbarium specimens show contrasting phenological responses to Himalayan climate.Proceedings of the National Academy of Sciences of the United States of America,111(29).
MLA	Hart R.,et al."Herbarium specimens show contrasting phenological responses to Himalayan climate".Proceedings of the National Academy of Sciences of the United States of America 111.29(2014).