Arid
DOI10.1016/j.agrformet.2018.05.015
Dew deposition suppresses transpiration and carbon uptake in leaves
Gerlein-Safdi, Cynthia1; Koohafkan, Michael C.2,3; Chung, Michaella3; Rockwell, Fulton E.4; Thompson, Sally3; Caylor, Kelly K.1,5,6
通讯作者Gerlein-Safdi, Cynthia
来源期刊AGRICULTURAL AND FOREST METEOROLOGY
ISSN0168-1923
EISSN1873-2240
出版年2018
卷号259页码:305-316
英文摘要

Dew deposition occurs in ecosystems worldwide, even in the driest deserts and in times of drought. Although some species absorb dew water directly via foliar uptake, a ubiquitous effect of dew on plant water balance is the interference of dew droplets with the leaf energy balance, which increases leaf albedo and emissivity and decreases leaf temperature through dew evaporation. Dew deposition frequency and amount are expected to be affected by changing environmental conditions, with unknown consequences for plant water stress and ecosystem carbon, water and energy fluxes. Here we present a simple leaf energy balance that characterizes the effect of deposition and the evaporation of dew on leaf energy balance, transpiration, and carbon uptake. The model is driven by five common meteorological variables and shows very good agreement with leaf wetness sensor data from the Blue Oak Ranch Reserve in California. We explore the tradeoffs between energy, water, and carbon balances for leaves of different sizes across a range of relative humidity, wind speed, and air temperature conditions. Our results show significant water savings from transpiration suppression up to 25% for leaf characteristic lengths of 50 cm. CO2 assimilation is decreased by up to 12% by the presence of dew, except for bigger leaves in windspeed conditions below 1 m s(-1) when an increase in assimilation is expected.


英文关键词Carbon assimilation Dew Fog Leaf energy balance Leaf wetness Transpiration suppression
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000437064400028
WOS关键词LEAF WETNESS DURATION ; ENERGY-BALANCE MODEL ; TROPICAL RAIN-FOREST ; MONTANE CLOUD FOREST ; DRY DECIDUOUS FOREST ; STOMATAL CONDUCTANCE ; DOWNY MILDEW ; NEGEV DESERT ; WATER-BUDGET ; ANGLE
WOS类目Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
来源机构University of California, Davis ; University of California, Berkeley
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/207323
作者单位1.Princeton Univ, Dept Civil & Environm Engn, Princeton, NJ 08544 USA;
2.Univ Calif Davis, Hydrol Sci Grad Grp, Davis, CA 95616 USA;
3.Univ Calif Berkeley, Dept Civil & Environm Engn, Berkeley, CA 94720 USA;
4.Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA;
5.Univ Calif Santa Barbara, Dept Geog, Santa Barbara, CA 93106 USA;
6.UC Santa Barbara, Bren Sch Environm Sci & Managemen4, Santa Barbara, CA 93106 USA
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Gerlein-Safdi, Cynthia,Koohafkan, Michael C.,Chung, Michaella,et al. Dew deposition suppresses transpiration and carbon uptake in leaves[J]. University of California, Davis, University of California, Berkeley,2018,259:305-316.
APA Gerlein-Safdi, Cynthia,Koohafkan, Michael C.,Chung, Michaella,Rockwell, Fulton E.,Thompson, Sally,&Caylor, Kelly K..(2018).Dew deposition suppresses transpiration and carbon uptake in leaves.AGRICULTURAL AND FOREST METEOROLOGY,259,305-316.
MLA Gerlein-Safdi, Cynthia,et al."Dew deposition suppresses transpiration and carbon uptake in leaves".AGRICULTURAL AND FOREST METEOROLOGY 259(2018):305-316.
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