Measuring the pulse of trees; using the vascular system to predict tree mortality in the 21st century. Issue 1 (13th August 2019)

• Record Type: Journal Article
• Authors: Brodribb, Timothy J; Cochard, Herve; Dominguez, Celia Rodriguez
• Editors: Hultine, Kevin
• Is Part Of: Conservation physiology. Volume 7:Issue 1(2019)
• Publication Date: 2019-08-13
• Subjects: Drought -- extinction -- hydraulic -- tree mortality; Nature -- Effect of human beings on -- Periodicals; Conservation biology -- Periodicals; 577.05
• DOI: 10.1093/conphys/coz046
• Languages: English
• ISSNs: 2051-1434

Abstract

Abstract : Tree death is a major legacy of climatic extremes, yet mechanistic models are rarely used to connect these events. In this perspective we review recent advances in tree hydraulic physiology that enable a new physiological approach to predict when, where and which species will die under future warming. Abstract: Tree mortality during hot and dry conditions presents a stark reminder of the vulnerability of plant species to climatic extremes. The current global warming trend makes predicting the impacts of hot/dry events on species survival an urgent task; yet, the standard tools for this purpose lack a physiological basis. This review examines a diversity of recent evidence demonstrating how physiological attributes of plant vascular systems can explain not only why trees die during drought, but also their distributional limits according to rainfall. These important advances in the science of plant water transport physiology provide the basis for new hydraulic models that can provide credible predictions of not only how but when, where and which species will be impacted by changes in rainfall and temperature in the future. Applying a recently developed hydraulic model using realistic parameters, we show that even apparently safe mesic forest in central France is predicted to experience major forest mortality before the end of the century.