globalchange  > 气候变化与战略
DOI: 10.1111/ele.13516
论文题名:
High water use in desert plants exposed to extreme heat
作者: Aparecido L.M.T.; Woo S.; Suazo C.; Hultine K.R.; Blonder B.
刊名: Ecology Letters
ISSN: 1461023X
出版年: 2020
卷: 23, 期:8
起始页码: 1189
结束页码: 1200
语种: 英语
中文关键词: Cowan–Farquhar ; functional trait ; heat waves ; Sonoran desert ; stomatal regulation ; thermal stress ; transpiration ; water use efficiency
英文关键词: water ; evapotranspiration ; heat ; photosynthesis ; plant ; plant leaf ; Extreme Heat ; Photosynthesis ; Plant Leaves ; Plant Transpiration ; Plants ; Water
英文摘要: Many plant water use models predict leaves maximize carbon assimilation while minimizing water loss via transpiration. Alternate scenarios may occur at high temperature, including heat avoidance, where leaves increase water loss to evaporatively cool regardless of carbon uptake; or heat failure, where leaves non-adaptively lose water also regardless of carbon uptake. We hypothesized that these alternative scenarios are common in species exposed to hot environments, with heat avoidance more common in species with high construction cost leaves. Diurnal measurements of leaf temperature and gas exchange for 11 Sonoran Desert species revealed that 37% of these species increased transpiration in the absence of increased carbon uptake. High leaf mass per area partially predicted this behaviour (r2 = 0.39). These data are consistent with heat avoidance and heat failure, but failure is less likely given the ecological dominance of the focal species. These behaviours are not yet captured in any extant plant water use model. © 2020 John Wiley & Sons Ltd/CNRS
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166578
Appears in Collections:气候变化与战略

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作者单位: School of Life Sciences, Arizona State University, 427 E Tyler Mall, Tempe, AZ 85821, United States; Department of Research, Conservation and Collections, Desert Botanical Garden, 1201 N. Galvin Parkway, Phoenix, AZ 85008, United States; Environmental Change Institute, School of Geography and the Environment, University of Oxford, South Parks Road, Oxford, OX1 3QY, United Kingdom; Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA 94720, United States

Recommended Citation:
Aparecido L.M.T.,Woo S.,Suazo C.,et al. High water use in desert plants exposed to extreme heat[J]. Ecology Letters,2020-01-01,23(8)
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