DOI: 10.1111/gcb.12781
论文题名: Acclimation of photosynthetic temperature optima of temperate and boreal tree species in response to experimental forest warming
作者: Sendall K.M. ; Reich P.B. ; Zhao C. ; Jihua H. ; Wei X. ; Stefanski A. ; Rice K. ; Rich R.L. ; Montgomery R.A.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 3 起始页码: 1342
结束页码: 1357
语种: 英语
英文关键词: Climate change
; Ecotone
; Maximum photosynthetic rate
; Range shifts
; Thermal plasticity
Scopus关键词: acclimation
; boreal forest
; climate change
; deciduous tree
; ecotone
; photosynthesis
; temperate forest
; warming
; Minnesota
; United States
; acclimatization
; climate change
; North America
; photosynthesis
; physiology
; plant dispersal
; temperature
; tree
; Acclimatization
; Climate Change
; North America
; Photosynthesis
; Plant Dispersal
; Temperature
; Trees
英文摘要: Rising temperatures caused by climate change could negatively alter plant ecosystems if temperatures exceed optimal temperatures for carbon gain. Such changes may threaten temperature-sensitive species, causing local extinctions and range migrations. This study examined the optimal temperature of net photosynthesis (Topt) of two boreal and four temperate deciduous tree species grown in the field in northern Minnesota, United States under two contrasting temperature regimes. We hypothesized that Topt would be higher in temperate than co-occurring boreal species, with temperate species exhibiting greater plasticity in Topt, resulting in better acclimation to elevated temperatures. The chamberless experiment, located at two sites in both open and understory conditions, continuously warmed plants and soils during three growing seasons. Results show a modest, but significant shift in Topt of 1.1 ± 0.21 °C on average for plants subjected to a mean 2.9 ± 0.01 °C warming during midday hours in summer, and shifts with warming were unrelated to species native ranges. The 1.1 °C shift in Topt with 2.9 °C warming might be interpreted as suggesting limited capacity to shift temperature response functions to better match changes in temperature. However, Topt of warmed plants was as well-matched with prior midday temperatures as Topt of plants in the ambient treatment, and Topt in both treatments was at a level where realized photosynthesis was within 90-95% of maximum. These results suggest that seedlings of all species were close to optimizing photosynthetic temperature responses, and equally so in both temperature treatments. Our study suggests that temperate and boreal species have considerable capacity to match their photosynthetic temperature response functions to prevailing growing season temperatures that occur today and to those that will likely occur in the coming decades under climate change. © 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/61614
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Department of Forest Resources, University of Minnesota, 1530 Cleveland Avenue N, St. Paul, MN, United States; Hawkesbury Institute for the Environment, University of Western Sydney, Penrith, NSW, Australia; State Key Laboratory of Grassland Agro-Ecosystems, School of Life Sciences, Lanzhou University, Lanzhou, China; Key Laboratory for Forest Resources and Ecosystem Processes of Beijing, Beijing Forestry University, Beijing, China; Institute of Soil and Water Conservation, Northwest AandF University, Yangling, China
Recommended Citation:
Sendall K.M.,Reich P.B.,Zhao C.,et al. Acclimation of photosynthetic temperature optima of temperate and boreal tree species in response to experimental forest warming[J]. Global Change Biology,2015-01-01,21(3)