Warm springs alter timing but not total growth of temperate deciduous trees

被引:79
作者
Dow, Cameron [1 ,2 ]
Kim, Albert Y. [1 ,3 ]
D'Orangeville, Loic [4 ,5 ]
Gonzalez-Akre, Erika B. [1 ]
Helcoski, Ryan [1 ]
Herrmann, Valentine [1 ]
Harley, Grant L. [6 ]
Maxwell, Justin T. [7 ]
McGregor, Ian R. [1 ,8 ]
McShea, William J. [1 ]
McMahon, Sean M. [9 ,10 ]
Pederson, Neil [4 ]
Tepley, Alan J. [1 ,11 ,12 ]
Anderson-Teixeira, Kristina J. [1 ,10 ]
机构
[1] Smithsonians Natl Zoo & Conservat Biol Inst, Conservat Ecol Ctr, Front Royal, VA 22630 USA
[2] Purdue Univ, Dept Forestry & Nat Resources, W Lafayette, IN 47907 USA
[3] Smith Coll, Stat & Data Sci, Northampton, MA 01063 USA
[4] Harvard Forest, Petersham, MA USA
[5] Univ New Brunswick, Fac Forestry & Environm Management, Fredericton, NB, Canada
[6] Univ Idaho, Dept Earth & Spatial Sci, Moscow, ID 83843 USA
[7] Indiana Univ, Dept Geog, Bloomington, IN 47405 USA
[8] North Carolina State Univ, Ctr Geospatial Analyt, Raleigh, NC USA
[9] Smithsonian Environm Res Ctr, POB 28, Edgewater, MD 21037 USA
[10] Smithsonian Trop Res Inst, Forest GLobal Earth Observ, Panama City, Panama
[11] Canadian Forest Serv, Northern Forestry Ctr, Edmonton, AB, Canada
[12] Cal Poly Humboldt Univ, Dept Forestry & Wildland Resources, Arcata, CA USA
基金
加拿大自然科学与工程研究理事会; 美国国家科学基金会;
关键词
NET CARBON UPTAKE; INTERANNUAL VARIABILITY; FOREST; SEASON; OAK; MODEL; WATER;
D O I
10.1038/s41586-022-05092-3
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
As the climate changes, warmer spring temperatures are causing earlier leaf-out(1-3) and commencement of CO2 uptake(1,3) in temperate deciduous forests, resulting in a tendency towards increased growing season length(3) and annual CO2 uptake(1,3-7). However, less is known about how spring temperatures affect tree stem growth(8,9), which sequesters carbon in wood that has a long residence time in the ecosystem(10,11). Here we show that warmer spring temperatures shifted stem diameter growth of deciduous trees earlier but had no consistent effect on peak growing season length, maximum growth rates, or annual growth, using dendrometer band measurements from 440 trees across two forests. The latter finding was confirmed on the centennial scale by 207 tree-ring chronologies from 108 forests across eastern North America, where annual ring width was far more sensitive to temperatures during the peak growing season than in the spring. These findings imply that any extra CO2 uptake in years with warmer spring temperatures(4,5) does not significantly contribute to increased sequestration in long-lived woody stem biomass. Rather, contradicting projections from global carbon cycle models(1,12), our empirical results imply that warming spring temperatures are unlikely to increase woody productivity enough to strengthen the long-term CO2 sink of temperate deciduous forests.
引用
收藏
页码:552 / +
页数:25
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