Global-Change Drought and Forest Mortality

Derek Eamus; Alfredo Huete; Qiang Yu

doi:10.1017/CBO9781107286221.021

20 - Global-Change Drought and Forest Mortality

from Section Four - Case Studies

Published online by Cambridge University Press: 05 June 2016

Derek Eamus ,

Alfredo Huete and

Qiang Yu

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Derek Eamus: Affiliation:
University of Technology, Sydney
Alfredo Huete: Affiliation:
University of Technology, Sydney
Qiang Yu: Affiliation:
University of Technology, Sydney

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Summary

Introduction

In the past century, atmospheric CO2 concentrations have increased by approximately 110 ppm. During this time, average global surface temperatures have increased by almost 1°C. Over the past fifty years, annual rainfall across large areas of all continents has substantially declined periodically, often for several-to-many years consecutively, resulting in widespread and prolonged drought conditions. While drought is a recurrent feature of global weather patterns, the areal extent, duration, and intensity, of these droughts is unprecedented. Consequently, widespread forest (and grassland) mortality is occurring in response to these droughts. The loss of such large areas of vegetation has major negative impacts on the provision of ecosystem services, landscape albedo, carbon, water and energy balances, soil erosion and biodiversity.

Field assessments of mortality have been undertaken extensively in the United States and Europe, but less extensively in Asia and Australia, where population density is often low across extensive regions and scientific staff and resources tend to be concentrated in cities. Application of remote sensing to regional-scale mortality has been undertaken in the past decade and these studies have been invaluable in quantifying the timing and extent of regional die-back and mortality. In addition, models of the mechanisms of mortality are being developed and these are briefly discussed.

Vegetation mortality (forests and grasslands in particular) have experienced climate-change induced droughts that have persisted for two to seven years across all continents over the past fifty years. The combination of reduced water supply and increased vapour pressure deficit and temperature have resulted in excessive and unrepaired embolism, fatal canopy dehydration, and fatal depletions of carbon stores. Associated decreased resistance to biotic (fungal, insect) stress can also provide the final push into widespread mortality. Remote sensing has provided indices of the climatic drivers, the aerial extent, and the timing of these events.

The three big questions addressed in this case study are: (1) where is regional-scale vegetation mortality occurring; (2) what in regional climate systems is causing mortality; and (3) what mechanisms may link climate to vegetation mortality?

Global Change-Type Droughts

Drought can be defined as a period of time when rainfall is lower than the long-term average for a given site. Droughts can persist for periods of months-to-years and to more than a decade (Table 20.1).

Type: Chapter
Information: Vegetation Dynamics
A Synthesis of Plant Ecophysiology, Remote Sensing and Modelling
, pp. 484 - 512

DOI: https://doi.org/10.1017/CBO9781107286221.021 [Opens in a new window]

Publisher: Cambridge University Press

Print publication year: 2016

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References

Allen, CD, Macalady, AK, Chenschouni, H, Bachelet, D, McDowell, N and Vennetier, M, (2010). A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forests. Forest Ecology and Management 259, 660–684.Google Scholar

Anderegg, WRL, Berry, JA and Field, CB, (2012a). Linking definitions, mechanisms, and modelling of drought-induced tree death. Trends in Plant Science 17, 693–700.Google Scholar

Anderegg, WRL, Berry, JA, Smith, DB, Sperry, JS, Anderegg, LDL and Field, CB, (2012b). The roles of hydraulic and carbon stress in a widespread climate-induced forest die-off. Proceedings of the National Academy of Science 109, 233–237.Google Scholar

Asner, GP, Broadbent, EN, Oliveira, PJC, Keller, M, Knapp, DE and Silva, JNM, (2006). Condition and fate of logged forests in the Brazilian Amazon. Proceedings of the National Academy of Sciences 103, 12947–12950.Google Scholar

Breshears, DD, Cobb, NS, Rich, PM, Price, KP, Allen, CD and Balice, RG, (2005). Regional vegetation die-off in response to global-change type drought. Proceedings of the National Academy of Sciences 95, 15144–15148.Google Scholar

Breshears, DD, Adams, HD, Eamus, D, McDowell, NG, Law, DJ, Will, RE, Williams, AP and Zou, CB, (2013). The critical amplifying role of increasing atmospheric moisture demand on tree mortality and associated regional die-off. Frontiers in Plant Science 4, 266. DOI 10.3389/fpls.2013.00266Google Scholar

Brodribb, TJ and Cochard, H, (2009). Hydraulic failure defined the recovery and point of death in water-stressed conifers. Plant Physiology 149, 575–584.Google Scholar

Brown, JF, Wardlow, BD, Tadesse, T, Hayes, MJ and Reed, BC, (2008). The Vegetation Drought Response Index (VegDRI): A new integrated approach for monitoring drought stress in vegetation. Remote Sensing 45, 16–46.Google Scholar

Chen, W, Xiao, Q and Sheng, Y, (1994). Application of the anomaly vegetation index to monitoring heavy drought in 1992. Remote Sensing of the Environment 9, 106–112.Google Scholar

Choat, B, Jansen, S, Brodribb, TJ, Cochard, H, Delzon, S, Bhaskar, R, Bucci, SJ, ( 2012). Global convergence in the vulnerability of forests to drought. Nature 491, 752–755.Google Scholar

Dai, A, (2011). Drought under global warming: a review. Wiley Interdisciplinary Reviews: Climate Change, 2, 45–65.Google Scholar

Eamus, D, Boulain, N, Cleverly, J and Breshears, DD, (2013). Global change-type drought-induced tree mortality: vapour pressure deficit is more important than temperature per se in causing decline of tree health. Ecology and Evolution 3, 2711–2729.Google Scholar

Fisher, RA, Williams, M, Costa, AL da, Malhi, Y, Costa, RF da, Almeida, S and Meir, PW, (2007). The response of an Eastern Amazonian rainforest to drought stress: Results and modelling analyses from a through-fall exclusion experiment. Global Change Biology 13, 1–8.Google Scholar

Galiano, L, Martınez-Vilalta, J and Lloret, F, (2011). Carbon reserves and canopy defoliation determine the recovery of Scots pine 4 yr after a drought episode. New Phytologist 190, 750–759.Google Scholar

Güneralp, B and Gertner, G, (2007). Feedback loop dominance analysis of two tree mortality models: relationship between structure and behavior. Tree Physiology 27(2): 269–280.Google Scholar

Huang, C-Y, Asner, GP, Barger, NN, Neff, JC, Floyd, ML, (2010). Regional aboveground live carbon losses due to drought-induced tree dieback in piñon-juniper ecosystemsRemote Sensing of Environment 114, 1471–1479.Google Scholar

Huete, AR, Didan, K, Shimabukuro, YE, Ratana, P, Saleska, SR, Hutyra, LR, Yang, W, Nemani, RR and Myneni, R, (2006). Amazon rainforests green-up with sunlight in dry season. Geophysical Research Letters 33 doi:10.1029/2005GL025583.Google Scholar

Kogan, FN, (1995). Application of vegetation index and brightness temperature for drought detection. Advances in Space Research 15, 91–100.Google Scholar

Manion, PD, (1981). Tree disease concepts. Prentice Hall, Englewood Cliffs, USA.

Martínez-Vilalta, J, Piñol, J and Beven, K, (2002). A hydraulic model to predict drought-induced mortality in woody plants: an application to climate change in the Mediterranean. Ecological Modelling 155, 127–147.Google Scholar

McAuliffe, JR and Hamerlynck, EP, (2010). Perennial plant mortality in the Sonoran and Mojave deserts in response to severe multi-year drought. Journal of Arid Environments 74, 885–896.Google Scholar

McDowell, NG, Pockman, WT and Allen, CD, (2008). Mechanisms of plant survival and mortality during drought: why do some plants survive while others succumb to drought?New Phytologist 178, 719–739.Google Scholar

McDowell, NG, Beerling, DJ, Breshears, DD, Fisher, RA, Raffa, KF and Stitt, M, (2011). The interdependence of mechanisms underlying climate-driven vegetation mortality. Trends in Ecology and Evolution 26, 523–532.Google Scholar

Mitchell, PJ, O'Grady, AP, Tissue, DT, White, DA, Ottenschlaeger, ML and Pinkard, EA, (2013). Drought response strategies define relative contributions of hydraulic dysfunction and carbohydrate depletion during tree mortality. New Phytologist 197, 862–872.Google Scholar

Potter, C, Klooster, S, Hiatt, C, Genovese, V and Castilla-Rubio, JC, (2011). Changes in the carbon cycle of Amazon ecosystems during the 2010 drought. Environmental Research Letters 6, doi:10.1088/1748–9326/6/3/034024.Google Scholar

Potter, C, Klooster, S, Huete, A, Genovese, V, Bustamante, M, Ferreira, LG, de Oliveira, RC Junior and Zepp, R, (2009). Terrestrial carbon sinks in the Brazilian Amazon and Cerrado region predicted from MODIS satellite data and ecosystem modelling. Biogeosciences Discussion 6, 947–969.Google Scholar

Sandholt, I, Rasmussenand, K and Andersen, J, (2002). A simple interpretation of the surface temperature/vegetation index space for assessment of surface moisture status. Remote Sensing of Environment 79, 213–224.Google Scholar

Shen, C, Wang, W-C, Hao, Z and Gong, W, (2007). Exceptional drought events over eastern China during the last five centuries. Climatic Change 85, 453–471.

Sitch, S, Smith, B, Prentice, IC, Arneth, A, Bondeau, A, Cramer, W, Kaplan, JO, Levis, S, Lucht, W, Sykes, MT, Thonicke, K and Venevsky, S, (2003). Evaluation of ecosystem dynamics, plant geography and terrestrial carbon cycling in the LPJ dynamic global vegetation model. Global Change Biology 9, 161–185.Google Scholar

Urli, M, Porte, AJ, Cochard, H, Guengant, Y, Burlett, R and Delson, S, (2013). Xylem embolism threshold for catastrophic hydraulic failure in angiosperm trees. Tree Physiology 33, 672–683.Google Scholar

Wang, W, Peng, C, Kneeshaw, DD, Larocque, GR and Luo, Z, (2012). Drought induced tree mortality: ecological consequences, causes and modelling. Environmental Reviews 20, 109–121.Google Scholar

Whitehead, D and Jarvis, PG, (1981). Coniferous forests and plantations. In Water Deficits and Plant Growth, Vol. VI. Kozlowski, TT (Ed), Academic Press, New York, pp. 49–52.

Whitley, RJ, Macinnis-Ng, CMO, Hutley, LB, Berringer, J, Zeppel, M, Williams, M, Taylor, D and Eamus, D, (2011). Is productivity of mesic savannas light-limited or water-limited? Results of a simulation study. Global Change Biology 17, 3130–3149.Google Scholar

Williams, M, Law, BE, Anthoni, PM and Unsworth, MH, (2001). Use of a simulation model and ecosystem flux data to examine carbon−water interactions in ponderosa pine. Tree Physiology 21, 287–298.Google Scholar

Yao, Y, Liang, S, Qin, Q and Wang, K, (2010). Monitoring drought over the conterminous United States using MODIS and NCEP reanalysis-2 data. Journal of Applied Meteorology and Climatology 49, 1665–1680.Google Scholar

Zeng, N, Mariotti, A and Wetzel, P, (2005). Terrestrial mechanisms of interannual CO2 variability. Global Biogeochemical Cycles 19, GB1016, doi:10.1029/2004GB002273.Google Scholar

Zeppel, MJ, Macinnis-Ng, C, Palmer, A, Taylor, D, Whitley, R, Fuentes, S, Yunusa, I, Williams, M and Eamus, D, (2008). An analysis of the sensitivity of sap flux to soil and plant variables assessed for an Australian woodland using a soil-plant-atmosphere model. Functional Plant Biology 35, 509–520.Google Scholar

Zhang, XY, Wang, YQ, Zhang, XC, Guo, W and Gong, SL, (2008). Carbonaceous aerosol composition over various regions of China during 2006. Journal of Geophysical Research 113, D14; DOI: 10.1029/2007JD009525Google Scholar

Zhang, K, Kimball, JS, Mu, Q, Jones, LA, Goetz, SJ and Running, SW, (2009). Satellite based analysis of northern ET trends and associated changes in the regional water balance from 1983 to 2005. Journal of Hydrology 379, 92–110.Google Scholar