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An ecoclimatic framework for evaluating the resilience of vegetation to water deficit

Citation

Mitchell, PJ and O'Grady, AP and Pinkard, EA and Brodribb, TJ and Arndt, SK and Blackman, CJ and Duursma, RA and Fensham, RJ and Hilbert, DW and Nitschke, CR and Norris, J and Roxburgh, SH and Ruthrof, KX and Tissue, DT, An ecoclimatic framework for evaluating the resilience of vegetation to water deficit, Global Change Biology, 22, (5) pp. 1677-1689. ISSN 1354-1013 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 John Wiley & Sons Ltd.

DOI: doi:10.1111/gcb.13177

Abstract

The surge in global efforts to understand the causes and consequences of drought on forest ecosystems has tended to focus on specific impacts such as mortality. We propose an ecoclimatic framework that takes a broader view of the ecological relevance of water deficits, linking elements of exposure and resilience to cumulative impacts on a range of ecosystem processes. This ecoclimatic framework is underpinned by two hypotheses: (i) exposure to water deficit can be represented probabilistically and used to estimate exposure thresholds across different vegetation types or ecosystems; and (ii) the cumulative impact of a series of water deficit events is defined by attributes governing the resistance and recovery of the affected processes. We present case studies comprising Pinus edulis and Eucalyptus globulus, tree species with contrasting ecological strategies, which demonstrate how links between exposure and resilience can be examined within our proposed framework. These examples reveal how climatic thresholds can be defined along a continuum of vegetation functional responses to water deficit regimes. The strength of this framework lies in identifying climatic thresholds on vegetation function in the absence of more complete mechanistic understanding, thereby guiding the formulation, application and benchmarking of more detailed modelling.

Item Details

Item Type:Refereed Article
Keywords:drought mortality, forest ecosystems, drought resistance, resilience, tree die-off, climate vulnerability, plant hydraulics, recruitment, climatic thresholds
Research Division:Biological Sciences
Research Group:Plant Biology
Research Field:Plant Physiology
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Environmental Sciences
Author:Brodribb, TJ (Dr Tim Brodribb)
ID Code:110870
Year Published:2016
Funding Support:Australian Research Council (FT100100237)
Web of Science® Times Cited:10
Deposited By:Plant Science
Deposited On:2016-08-19
Last Modified:2017-11-01
Downloads:0

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