DOI: 10.1111/gcb.12804
论文题名: Alteration of the phenology of leaf senescence and fall in winter deciduous species by climate change: Efects on nutrient proficiency
作者: Estiarte M. ; Peñuelas J.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 3 起始页码: 1005
结束页码: 1017
语种: 英语
英文关键词: Climate change
; Drought
; Leaf fall
; Leaf senescence
; Litter
; Nutrient cycle
; Nutrient proficiency
; Phenology
; Plant production
; Warming
; Winter deciduous species
Scopus关键词: climate change
; climate effect
; deciduous tree
; litterfall
; nutrient availability
; phenology
; photoperiod
; senescence
; temperature effect
; warming
; water stress
; climate change
; physiology
; plant leaf
; season
; tree
; Climate Change
; Plant Leaves
; Seasons
; Trees
英文摘要: Leaf senescence in winter deciduous species signals the transition from the active to the dormant stage. The purpose of leaf senescence is the recovery of nutrients before the leaves fall. Photoperiod and temperature are the main cues controlling leaf senescence in winter deciduous species, with water stress imposing an additional influence. Photoperiod exerts a strict control on leaf senescence at latitudes where winters are severe and temperature gains importance in the regulation as winters become less severe. On average, climatic warming will delay and drought will advance leaf senescence, but at varying degrees depending on the species. Warming and drought thus have opposite effects on the phenology of leaf senescence, and the impact of climate change will therefore depend on the relative importance of each factor in specific regions. Warming is not expected to have a strong impact on nutrient proficiency although a slower speed of leaf senescence induced by warming could facilitate a more efficient nutrient resorption. Nutrient resorption is less efficient when the leaves senesce prematurely as a consequence of water stress. The overall effects of climate change on nutrient resorption will depend on the contrasting effects of warming and drought. Changes in nutrient resorption and proficiency will impact production in the following year, at least in early spring, because the construction of new foliage relies almost exclusively on nutrients resorbed from foliage during the preceding leaf fall. Changes in the phenology of leaf senescence will thus impact carbon uptake, but also ecosystem nutrient cycling, especially if the changes are consequence of water stress. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61585
Appears in Collections: 影响、适应和脆弱性
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作者单位: CSIC, Global Ecology Unit CREAF-CSIC-UAB, Cerdanyola del Vallès, Barcelona, Catalonia, Spain; CREAF, Cerdanyola del Vallès, Barcelona, Catalonia, Spain
Recommended Citation:
Estiarte M.,Peñuelas J.. Alteration of the phenology of leaf senescence and fall in winter deciduous species by climate change: Efects on nutrient proficiency[J]. Global Change Biology,2015-01-01,21(3)