Tropical forest leaves may darken in response to climate change

被引：27

作者：

Doughty, Christopher E. ^{[1
]}

Efren Santos-Andrade, Paul ^{[2
]}

Shenkin, Alexander ^{[3
]}

Goldsmith, Gregory R. ^{[4
]}

Bentley, Lisa P. ^{[5
]}

Blonder, Benjamin ^{[3
]}

Diaz, Sandra ^{[6
,7
]}

Salinas, Norma ^{[2
,8
]}

Enquist, Brian J. ^{[9
]}

Martin, Roberta E. ^{[10
]}

Asner, Gregory P. ^{[10
]}

Malhi, Yadvinder ^{[3
]}

机构：

[1] No Arizona Univ, Sch Informat Comp & Cyber Syst, Flagstaff, AZ 86001 USA

[2] Univ Nacl San Antonio Abad Cusco, Cuzco, Peru

[3] Univ Oxford, Sch Geog & Environm, Environm Change Inst, Oxford, England

[4] Chapman Univ, Schmid Coll Sci & Technol, Orange, CA USA

[5] Sonoma State Univ, Dept Biol, Rohnert Pk, CA 94928 USA

[6] Consejo Nacl Invest Cient & Tecn, Inst Multidisciplinario Biol Vegetal, Cordoba, Argentina

[7] Univ Nacl Cordoba, Cordoba, Argentina

[8] Pontificia Univ Catolica Peru, Secc Quim, Lima, Peru

[9] Univ Arizona, Dept Ecol & Evolutionary Biol, Tucson, AZ USA

[10] Carnegie Inst Sci, Dept Global Ecol, Stanford, CA USA

来源：

NATURE ECOLOGY & EVOLUTION | 2018年 / 2卷 / 12期

基金：

英国自然环境研究理事会; 欧洲研究理事会; 美国国家科学基金会;

关键词：

LEAF; TEMPERATURE; TRAITS; MODEL; AREA; PRODUCTIVITY; REFLECTANCE; DEPENDENCE; FRAMEWORK; TRENDS;

D O I：

10.1038/s41559-018-0716-y

中图分类号：

Q14 [生态学（生物生态学）];

学科分类号：

071012 ; 0713 ;

摘要：

Tropical forest leaf albedo (reflectance) greatly impacts how much energy the planet absorbs; however; little is known about how it might be impacted by climate change. Here, we measure leaf traits and leaf albedo at ten 1-ha plots along a 3,200-m elevation gradient in Peru. Leaf mass per area (LMA) decreased with warmer temperatures along the elevation gradient; the distribution of LMA was positively skewed at all sites indicating a shift in LMA towards a warmer climate and future reduced tropical LMA. Reduced LMA was significantly (P < 0.0001) correlated with reduced leaf near-infrared (NIR) albedo; community-weighted mean NIR albedo significantly (P < 0.01) decreased as temperature increased. A potential future 2 degrees C increase in tropical temperatures could reduce lowland tropical leaf LMA by 6-7 g m(-2) (5-6%) and reduce leaf NIR albedo by 0.0015-0.002 units. Reduced NIR albedo means that leaves are darker and absorb more of the Sun's energy. Climate simulations indicate this increased absorbed energy will warm tropical forests more at high CO2 conditions with proportionately more energy going towards heating and less towards evapotranspiration and cloud formation.

引用

页码：1918 / 1924

页数：7

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