A belowground perspective on the drought sensitivity of forests: Towards improved understanding and simulation

FOREST ECOLOGY AND MANAGEMENT

卷:380

Review

Phillips, Richard P.¹  Ibanez, Ines²  D'Orangeville, Loic^1,3  Hanson, Paul J.^4,5  Ryan, Michael G.⁶  McDowell, Nathan G.⁷ 

[1] Indiana Univ, Dept Biol, Bloomington, IN 47405 USA

[2] Univ Michigan, Sch Nat Resources & Environm, Ann Arbor, MI 48109 USA

[3] Univ Quebec Montreal, Ctr Etud Foret, Case Postale 8888,Succursale Ctr Ville, Montreal, PQ H3C 3P8, Canada

[4] Oak Ridge Natl Lab, Climate Change Sci Inst, Oak Ridge, TN 37830 USA

[5] Oak Ridge Natl Lab, Div Environm Sci, Oak Ridge, TN 37830 USA

[6] Colorado State Univ, Nat Resource Ecol Lab, Ft Collins, CO 80523 USA

[7] Los Alamos Natl Lab, Earth & Environm Sci Div, Los Alamos, NM 87545 USA

关键词: Water stress;    Ecosystem modeling;    Drought resilience;    Rooting strategies;    Earth system models;    Land surface models;   

DOI  :  10.1016/j.foreco.2016.08.043

来源: Elsevier

【 摘 要 】

Predicted increases in the frequency and intensity of droughts across the temperate biome have highlighted the need to examine the extent to which forests may differ in their sensitivity to water stress. At present, a rich body of literature exists on how leaf- and stem-level physiology influence tree drought responses; however, less is known regarding the dynamic interactions that occur belowground between roots and soil physical and biological factors. Hence, there is a need to better understand how and why processes occurring belowground influence forest sensitivity to drought. Here, we review what is known about tree species' belowground strategies for dealing with drought, and how physical and biological characteristics of soils interact with rooting strategies to influence forest sensitivity to drought. Then, we highlight how a belowground perspective of drought can be used in models to reduce uncertainty in predicting the ecosystem consequences of droughts in forests. Finally, we describe the challenges and opportunities associated with managing forests under conditions of increasing drought frequency and intensity, and explain how a belowground perspective on drought may facilitate improved forest management. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free