Pervasive drought legacies in forest ecosystems and their implications for carbon cycle models

被引：956

作者：

Anderegg, W. R. L. ^{[1
,2
,3
]}

Schwalm, C. ^{[4
,5
]}

Biondi, F. ^{[6
,7
]}

Camarero, J. J. ^{[8
]}

Koch, G. ^{[4
]}

Litvak, M. ^{[9
]}

Ogle, K. ^{[10
]}

Shaw, J. D. ^{[11
]}

Shevliakova, E. ^{[12
]}

Williams, A. P. ^{[13
]}

Wolf, A. ^{[1
]}

Ziaco, E. ^{[1
,6
,7
]}

Pacala, S.

机构：

[1] Princeton Univ, Dept Ecol & Evolutionary Biol, Princeton, NJ 08544 USA

[2] Univ Utah, Dept Biol, Salt Lake City, UT 84112 USA

[3] Univ Arizona, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA

[4] No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA

[5] No Arizona Univ, Sch Earth Sci & Environm Sustainabil, Flagstaff, AZ 86011 USA

[6] Univ Nevada, DendroLab, Reno, NV 89557 USA

[7] Univ Nevada, Grad Program Ecol Evolut & Conservat Biol, Reno, NV 89557 USA

[8] CSIC, Inst Pirenaico Ecol, Zaragoza 50192, Spain

[9] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA

[10] Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA

[11] US Forest Serv, Rocky Mt Res Stn, Ogden, UT 84401 USA

[12] NOAA, Geophys Fluid Dynam Lab, Princeton, NJ 08540 USA

[13] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA

来源：

SCIENCE | 2015年 / 349卷 / 6247期

基金：

美国国家科学基金会;

关键词：

CLIMATE EXTREMES; RESILIENCE; ALLOCATION; FEEDBACKS; SAVANNA; DIEBACK; MEMORY; LIGHT; PLANT; HEAT;

D O I：

10.1126/science.aab1833

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：

The impacts of climate extremes on terrestrial ecosystems are poorly understood but important for predicting carbon cycle feedbacks to climate change. Coupled climate-carbon cycle models typically assume that vegetation recovery from extreme drought is immediate and complete, which conflicts with the understanding of basic plant physiology. We examined the recovery of stem growth in trees after severe drought at 1338 forest sites across the globe, comprising 49,339 site-years, and compared the results with simulated recovery in climate-vegetation models. We found pervasive and substantial "legacy effects" of reduced growth and incomplete recovery for 1 to 4 years after severe drought. Legacy effects were most prevalent in dry ecosystems, among Pinaceae, and among species with low hydraulic safety margins. In contrast, limited or no legacy effects after drought were simulated by current climate-vegetation models. Our results highlight hysteresis in ecosystem-level carbon cycling and delayed recovery from climate extremes.

引用

页码：528 / 532

页数：5

共 39 条

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