globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13477
论文题名:
Thermal limits of leaf metabolism across biomes
作者: O'sullivan O.S.; Heskel M.A.; Reich P.B.; Tjoelker M.G.; Weerasinghe L.K.; Penillard A.; Zhu L.; Egerton J.J.G.; Bloomfield K.J.; Creek D.; Bahar N.H.A.; Griffin K.L.; Hurry V.; Meir P.; Turnbull M.H.; Atkin O.K.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:1
起始页码: 209
结束页码: 223
语种: 英语
英文关键词: heat waves ; high-temperature tolerance ; latitudinal patterns ; photosynthesis ; respiration ; T crit ; T max ; temperature extremes
Scopus关键词: biome ; global warming ; heating ; high temperature ; leaf ; metabolism ; photosynthesis ; respiration ; risk assessment ; temperature tolerance ; Alaska ; Amazonia ; Arctic ; Peru ; United States ; Animalia
英文摘要: High-temperature tolerance in plants is important in a warming world, with extreme heat waves predicted to increase in frequency and duration, potentially leading to lethal heating of leaves. Global patterns of high-temperature tolerance are documented in animals, but generally not in plants, limiting our ability to assess risks associated with climate warming. To assess whether there are global patterns in high-temperature tolerance of leaf metabolism, we quantified Tcrit (high temperature where minimal chlorophyll a fluorescence rises rapidly and thus photosystem II is disrupted) and Tmax (temperature where leaf respiration in darkness is maximal, beyond which respiratory function rapidly declines) in upper canopy leaves of 218 plant species spanning seven biomes. Mean site-based Tcrit values ranged from 41.5 °C in the Alaskan arctic to 50.8 °C in lowland tropical rainforests of Peruvian Amazon. For Tmax, the equivalent values were 51.0 and 60.6 °C in the Arctic and Amazon, respectively. Tcrit and Tmax followed similar biogeographic patterns, increasing linearly (˜8 °C) from polar to equatorial regions. Such increases in high-temperature tolerance are much less than expected based on the 20 °C span in high-temperature extremes across the globe. Moreover, with only modest high-temperature tolerance despite high summer temperature extremes, species in mid-latitude (~20–50°) regions have the narrowest thermal safety margins in upper canopy leaves; these regions are at the greatest risk of damage due to extreme heat-wave events, especially under conditions when leaf temperatures are further elevated by a lack of transpirational cooling. Using predicted heat-wave events for 2050 and accounting for possible thermal acclimation of Tcrit and Tmax, we also found that these safety margins could shrink in a warmer world, as rising temperatures are likely to exceed thermal tolerance limits. Thus, increasing numbers of species in many biomes may be at risk as heat-wave events become more severe with climate change. © 2016 John Wiley & Sons Ltd
资助项目: We thank Damien Bonal, Eric Cosio and Norma Salinas for access to the sites in French Guiana and Peru ; Felipe Sinca and Zsofia Strangl for field assistance in Peru and Sweden, respectively ; Tom Reader for statistical advice. We also thank three anonymous reviewers for their constructive and detailed comments that helped us improve the manuscript. Access to the two Peruvian sites was also facilitated by a Moore Foundation grant (Oliver Phillips, Yadvinder Mahli, and Jon Lloyd ; www.rainfor.org). This work was funded by grants/fellowships from the Australian Research Council (DP0986823, DP130101252, CE140100008, FT0991448) to O.K.A., DP140103415 to M.G.T., FT110100457 to P.M., Natural Environment Research Council (UK) to P.M. (NERC NE/F002149/1), USA National Science Foundation to K.L.G. (DEB-1234162), U.S. Department of Energy to P.B.R. (DE-FG02-07ER64456), and U.S. Department of Energy, Office of Science, Office of Biological and Environmental Research (BER) through the Southeastern Regional Center of the National Institute for Climatic Change Research at Duke University to M.G.T and Texas AgriLife Research to M.G.T.
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61109
Appears in Collections:影响、适应和脆弱性

Files in This Item:

There are no files associated with this item.


作者单位: Division of Plant Sciences, Research School of Biology, The Australian National University, Building 46, Canberra, ACT, Australia; Department of Animal and Plant Sciences, University of Sheffield, Alfred Denny Building, Western Bank, Sheffield, United Kingdom; The Ecosystems Center, Marine Biological Laboratory, Woods Hole, MA, United States; Hawkesbury Institute for the Environment, Western Sydney University, Penrith, NSW, Australia; Department of Forest Resources, University of Minnesota, 1530 Cleveland Avenue North, St. Paul, MN, United States; Faculty of Agriculture, University of Peradeniya, Peradeniya, Sri Lanka; ARC Centre of Excellence in Plant Energy Biology, Research School of Biology, The Australian National University, Building 134, Canberra, ACT, Australia; Department of Earth and Environment Sciences, Columbia University, Palisades, NY, United States; Umeå Plant Science Centre, Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences, Umeå, Sweden; School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom; Centre for Integrative Ecology, School of Biological Sciences, University of Canterbury, Private Bag 4800, Christchurch, New Zealand

Recommended Citation:
O'sullivan O.S.,Heskel M.A.,Reich P.B.,et al. Thermal limits of leaf metabolism across biomes[J]. Global Change Biology,2017-01-01,23(1)
Service
Recommend this item
Sava as my favorate item
Show this item's statistics
Export Endnote File
Google Scholar
Similar articles in Google Scholar
[O'sullivan O.S.]'s Articles
[Heskel M.A.]'s Articles
[Reich P.B.]'s Articles
百度学术
Similar articles in Baidu Scholar
[O'sullivan O.S.]'s Articles
[Heskel M.A.]'s Articles
[Reich P.B.]'s Articles
CSDL cross search
Similar articles in CSDL Cross Search
[O'sullivan O.S.]‘s Articles
[Heskel M.A.]‘s Articles
[Reich P.B.]‘s Articles
Related Copyright Policies
Null
收藏/分享
所有评论 (0)
暂无评论
 

Items in IR are protected by copyright, with all rights reserved, unless otherwise indicated.