DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Forest responses to simulated elevated CO2 under alternate hypotheses of size- and age-dependent mortality

Abstract

Abstract Elevated atmospheric carbon dioxide (eCO 2 ) is predicted to increase growth rates of forest trees. The extent to which increased growth translates to changes in biomass is dependent on the turnover time of the carbon, and thus tree mortality rates. Size‐ or age‐dependent mortality combined with increased growth rates could result in either decreased carbon turnover from a speeding up of tree life cycles, or increased biomass from trees reaching larger sizes, respectively. However, most vegetation models currently lack any representation of size‐ or age‐dependent mortality and the effect of eCO 2 on changes in biomass and carbon turnover times is thus a major source of uncertainty in predictions of future vegetation dynamics. Using a reduced‐complexity form of the vegetation demographic model the Functionally Assembled Terrestrial Ecosystem Simulator to simulate an idealised tropical forest, we find increases in biomass despite reductions in carbon turnover time in both size‐ and age‐dependent mortality scenarios in response to a hypothetical eCO 2 ‐driven 25% increase in woody net primary productivity (wNPP). Carbon turnover times decreased by 9.6% in size‐dependent mortality scenarios due to a speeding up of tree life cycles, but also by 2.0% when mortality was age‐dependent, as larger crownsmore » led to increased light competition. Increases in aboveground biomass (AGB) were much larger when mortality was age‐dependent (24.3%) compared with size‐dependent (13.4%) as trees reached larger sizes before death. In simulations with a constant background mortality rate, carbon turnover time decreased by 2.1% and AGB increased by 24.0%, however, absolute values of AGB and carbon turnover were higher than in either size‐ or age‐dependent mortality scenario. The extent to which AGB increases and carbon turnover decreases will thus depend on the mechanisms of large tree mortality: if increased size itself results in elevated mortality rates, then this could reduce by about half the increase in AGB relative to the increase in wNPP.« less

Authors:
ORCiD logo [1];  [1];  [2]; ORCiD logo [1];  [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  2. Centre Europeen de Recherche et de Formation Avancee en Calcul Scientifique, Toulouse (France)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Biological and Environmental Research (BER)
OSTI Identifier:
1782200
Alternate Identifier(s):
OSTI ID: 1643164
Grant/Contract Number:  
AC02-05CH11231
Resource Type:
Accepted Manuscript
Journal Name:
Global Change Biology
Additional Journal Information:
Journal Volume: 26; Journal Issue: 10; Journal ID: ISSN 1354-1013
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; carbon turnover times; CO2 fertilization; forest dynamics; global change; tree mortality; vegetation models

Citation Formats

Needham, Jessica F., Chambers, Jeffrey, Fisher, Rosie, Knox, Ryan, and Koven, Charles D. Forest responses to simulated elevated CO2 under alternate hypotheses of size- and age-dependent mortality. United States: N. p., 2020. Web. doi:10.1111/gcb.15254.
Needham, Jessica F., Chambers, Jeffrey, Fisher, Rosie, Knox, Ryan, & Koven, Charles D. Forest responses to simulated elevated CO2 under alternate hypotheses of size- and age-dependent mortality. United States. https://doi.org/10.1111/gcb.15254
Needham, Jessica F., Chambers, Jeffrey, Fisher, Rosie, Knox, Ryan, and Koven, Charles D. Sat . "Forest responses to simulated elevated CO2 under alternate hypotheses of size- and age-dependent mortality". United States. https://doi.org/10.1111/gcb.15254. https://www.osti.gov/servlets/purl/1782200.
@article{osti_1782200,
title = {Forest responses to simulated elevated CO2 under alternate hypotheses of size- and age-dependent mortality},
author = {Needham, Jessica F. and Chambers, Jeffrey and Fisher, Rosie and Knox, Ryan and Koven, Charles D.},
abstractNote = {Abstract Elevated atmospheric carbon dioxide (eCO 2 ) is predicted to increase growth rates of forest trees. The extent to which increased growth translates to changes in biomass is dependent on the turnover time of the carbon, and thus tree mortality rates. Size‐ or age‐dependent mortality combined with increased growth rates could result in either decreased carbon turnover from a speeding up of tree life cycles, or increased biomass from trees reaching larger sizes, respectively. However, most vegetation models currently lack any representation of size‐ or age‐dependent mortality and the effect of eCO 2 on changes in biomass and carbon turnover times is thus a major source of uncertainty in predictions of future vegetation dynamics. Using a reduced‐complexity form of the vegetation demographic model the Functionally Assembled Terrestrial Ecosystem Simulator to simulate an idealised tropical forest, we find increases in biomass despite reductions in carbon turnover time in both size‐ and age‐dependent mortality scenarios in response to a hypothetical eCO 2 ‐driven 25% increase in woody net primary productivity (wNPP). Carbon turnover times decreased by 9.6% in size‐dependent mortality scenarios due to a speeding up of tree life cycles, but also by 2.0% when mortality was age‐dependent, as larger crowns led to increased light competition. Increases in aboveground biomass (AGB) were much larger when mortality was age‐dependent (24.3%) compared with size‐dependent (13.4%) as trees reached larger sizes before death. In simulations with a constant background mortality rate, carbon turnover time decreased by 2.1% and AGB increased by 24.0%, however, absolute values of AGB and carbon turnover were higher than in either size‐ or age‐dependent mortality scenario. The extent to which AGB increases and carbon turnover decreases will thus depend on the mechanisms of large tree mortality: if increased size itself results in elevated mortality rates, then this could reduce by about half the increase in AGB relative to the increase in wNPP.},
doi = {10.1111/gcb.15254},
journal = {Global Change Biology},
number = 10,
volume = 26,
place = {United States},
year = {Sat Jul 25 00:00:00 EDT 2020},
month = {Sat Jul 25 00:00:00 EDT 2020}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Identification of key parameters controlling demographically structured vegetation dynamics in a land surface model: CLM4.5(FATES)
journal, January 2019

  • Massoud, Elias C.; Xu, Chonggang; Fisher, Rosie A.
  • Geoscientific Model Development, Vol. 12, Issue 9
  • DOI: 10.5194/gmd-12-4133-2019

Functional traits and the growth–mortality trade‐off in tropical trees
journal, December 2010

  • Wright, S. Joseph; Kitajima, Kaoru; Kraft, Nathan J. B.
  • Ecology, Vol. 91, Issue 12
  • DOI: 10.1890/09-2335.1

Crown damage and the mortality of tropical trees
journal, August 2018

  • Arellano, Gabriel; Medina, Nagore G.; Tan, Sylvester
  • New Phytologist, Vol. 221, Issue 1
  • DOI: 10.1111/nph.15381

Assessing uncertainties in a second-generation dynamic vegetation model caused by ecological scale limitations
journal, July 2010


Rate of tree carbon accumulation increases continuously with tree size
journal, January 2014

  • Stephenson, N. L.; Das, A. J.; Condit, R.
  • Nature, Vol. 507, Issue 7490
  • DOI: 10.1038/nature12914

Simulating damage for wind storms in the land surface model ORCHIDEE-CAN (revision 4262)
journal, January 2018

  • Chen, Yi-Ying; Gardiner, Barry; Pasztor, Ferenc
  • Geoscientific Model Development, Vol. 11, Issue 2
  • DOI: 10.5194/gmd-11-771-2018

Diameter, Height, Crown, and Age Relationship in Eight Neotropical Tree Species
journal, September 1995

  • O'Brien, Sean T.; Hubbell, Stephen P.; Spiro, Peter
  • Ecology, Vol. 76, Issue 6
  • DOI: 10.2307/1940724

Dynamic response of a Philippine dipterocarp forest to typhoon disturbance
journal, December 2015

  • Yap, Sandra L.; Davies, Stuart J.; Condit, Richard
  • Journal of Vegetation Science, Vol. 27, Issue 1
  • DOI: 10.1111/jvs.12358

Parametric Controls on Vegetation Responses to Biogeochemical Forcing in the CLM5
journal, September 2019

  • Fisher, Rosie A.; Wieder, William R.; Sanderson, Benjamin M.
  • Journal of Advances in Modeling Earth Systems, Vol. 11, Issue 9
  • DOI: 10.1029/2019MS001609

The Central Amazon Biomass Sink Under Current and Future Atmospheric CO 2 : Predictions From Big‐Leaf and Demographic Vegetation Models
journal, March 2020

  • Holm, Jennifer A.; Knox, Ryan G.; Zhu, Qing
  • Journal of Geophysical Research: Biogeosciences, Vol. 125, Issue 3
  • DOI: 10.1029/2019JG005500

Lifetime growth patterns and ages of Bolivian rain forest trees obtained by tree ring analysis
journal, March 2006


Increasing dominance of large lianas in Amazonian forests
journal, August 2002

  • Phillips, Oliver L.; Vásquez Martínez, Rodolfo; Arroyo, Luzmila
  • Nature, Vol. 418, Issue 6899
  • DOI: 10.1038/nature00926

A matter of tree longevity
journal, January 2017


Drivers and mechanisms of tree mortality in moist tropical forests
journal, February 2018

  • McDowell, Nate; Allen, Craig D.; Anderson-Teixeira, Kristina
  • New Phytologist, Vol. 219, Issue 3
  • DOI: 10.1111/nph.15027

Long-Term Chronosequence of Forest Succession in the Upper Rio Negro of Colombia and Venezuela
journal, December 1988

  • Saldarriaga, Juan G.; West, Darrell C.; Tharp, M. L.
  • The Journal of Ecology, Vol. 76, Issue 4
  • DOI: 10.2307/2260625

Carbon residence time dominates uncertainty in terrestrial vegetation responses to future climate and atmospheric CO 2
journal, December 2013

  • Friend, Andrew D.; Lucht, Wolfgang; Rademacher, Tim T.
  • Proceedings of the National Academy of Sciences, Vol. 111, Issue 9
  • DOI: 10.1073/pnas.1222477110

Integration of Ecological Levels: Individual Plant Growth, Population Mortality and Ecosystem Processes
journal, June 1990

  • Clark, James S.
  • The Journal of Ecology, Vol. 78, Issue 2
  • DOI: 10.2307/2261112

Senescence, ageing and death of the whole plant: morphological prerequisites and constraints of plant immortality
journal, November 2014

  • Klimešová, Jitka; Nobis, Michael Peter; Herben, Tomáš
  • New Phytologist, Vol. 206, Issue 1
  • DOI: 10.1111/nph.13160

Pervasive decreases in living vegetation carbon turnover time across forest climate zones
journal, November 2019

  • Yu, Kailiang; Smith, William K.; Trugman, Anna T.
  • Proceedings of the National Academy of Sciences, Vol. 116, Issue 49
  • DOI: 10.1073/pnas.1821387116

Larger trees suffer most during drought in forests worldwide
journal, September 2015


The interdependence of mechanisms underlying climate-driven vegetation mortality
journal, October 2011

  • McDowell, Nate G.; Beerling, David J.; Breshears, David D.
  • Trends in Ecology & Evolution, Vol. 26, Issue 10
  • DOI: 10.1016/j.tree.2011.06.003

Nitrogen cycling in CMIP6 land surface models: progress and limitations
journal, January 2020

  • Davies-Barnard, Taraka; Meyerholt, Johannes; Zaehle, Sönke
  • Biogeosciences, Vol. 17, Issue 20
  • DOI: 10.5194/bg-17-5129-2020

Potential impact of large ungulate grazers on African vegetation, carbon storage and fire regimes: Grazer impacts on African savannas
journal, April 2015

  • Pachzelt, Adrian; Forrest, Matthew; Rammig, Anja
  • Global Ecology and Biogeography, Vol. 24, Issue 9
  • DOI: 10.1111/geb.12313

Size-related flowering and fecundity in the tropical canopy tree species, Shorea acuminata (Dipterocarpaceae) during two consecutive general flowerings
journal, October 2007


Previous-year reproduction reduces photosynthetic capacity and slows lifetime growth in females of a neotropical tree
journal, May 2004

  • Wheelwright, N. T.; Logan, B. A.
  • Proceedings of the National Academy of Sciences, Vol. 101, Issue 21
  • DOI: 10.1073/pnas.0402735101

In deep shade, elevated CO2 increases the vigor of tropical climbing plants
journal, November 2002


Causes and consequences of resource heterogeneity in forests: interspecific variation in light transmission by canopy trees
journal, February 1994

  • Canham, Charles D.; Finzi, Adrien C.; Pacala, Stephen W.
  • Canadian Journal of Forest Research, Vol. 24, Issue 2
  • DOI: 10.1139/x94-046

Influences of Forest Structure, Climate and Species Composition on Tree Mortality across the Eastern US
journal, October 2010


Nitrogen and phosphorus constrain the CO2 fertilization of global plant biomass
journal, August 2019

  • Terrer, César; Jackson, Robert B.; Prentice, I. Colin
  • Nature Climate Change, Vol. 9, Issue 9
  • DOI: 10.1038/s41558-019-0545-2

Field-experiment constraints on the enhancement of the terrestrial carbon sink by CO2 fertilization
journal, September 2019


Observed allocations of productivity and biomass, and turnover times in tropical forests are not accurately represented in CMIP5 Earth system models
journal, June 2015

  • Negrón-Juárez, Robinson I.; Koven, Charles D.; Riley, William J.
  • Environmental Research Letters, Vol. 10, Issue 6
  • DOI: 10.1088/1748-9326/10/6/064017

A free-air enrichment system for exposing tall forest vegetation to elevated atmospheric CO2
journal, March 1999


NET PRIMARY PRODUCTIVITY OF A CO 2 -ENRICHED DECIDUOUS FOREST AND THE IMPLICATIONS FOR CARBON STORAGE
journal, October 2002


Patterns of tree mortality in a temperate deciduous forest derived from a large forest dynamics plot
journal, December 2016

  • Gonzalez‐Akre, Erika; Meakem, Victoria; Eng, Cheng‐Yin
  • Ecosphere, Vol. 7, Issue 12
  • DOI: 10.1002/ecs2.1595

Size-mediated ageing reduces vigour in trees: Size reduces vigour in tall trees
journal, September 2005


Causes and implications of the correlation between forest productivity and tree mortality rates
journal, November 2011

  • Stephenson, Nathan L.; van Mantgem, Phillip J.; Bunn, Andrew G.
  • Ecological Monographs, Vol. 81, Issue 4
  • DOI: 10.1890/10-1077.1

Predicting and understanding forest dynamics using a simple tractable model
journal, October 2008

  • Purves, D. W.; Lichstein, J. W.; Strigul, N.
  • Proceedings of the National Academy of Sciences, Vol. 105, Issue 44
  • DOI: 10.1073/pnas.0807754105

Asynchronous carbon sink saturation in African and Amazonian tropical forests
journal, March 2020


Vegetation demographics in Earth System Models: A review of progress and priorities
journal, October 2017

  • Fisher, Rosie A.; Koven, Charles D.; Anderegg, William R. L.
  • Global Change Biology, Vol. 24, Issue 1
  • DOI: 10.1111/gcb.13910

Improved allometric models to estimate the aboveground biomass of tropical trees
journal, June 2014

  • Chave, Jérôme; Réjou-Méchain, Maxime; Búrquez, Alberto
  • Global Change Biology, Vol. 20, Issue 10
  • DOI: 10.1111/gcb.12629

Fingerprinting the impacts of global change on tropical forests
journal, March 2004

  • Lewis, Simon L.; Malhi, Yadvinder; Phillips, Oliver L.
  • Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, Vol. 359, Issue 1443
  • DOI: 10.1098/rstb.2003.1432

Intraspecific Variation in the Fruiting of an Amazonian Timber Tree: Implications for Management
journal, March 2009


Direct effects of lightning in temperate forests: a review and preliminary survey in a hemlock–hardwood forest of the northern United States
journal, October 2015

  • Yanoviak, Stephen P.; Gora, Evan M.; Fredley, Jennifer
  • Canadian Journal of Forest Research, Vol. 45, Issue 10
  • DOI: 10.1139/cjfr-2015-0081

Does tree size influence timing of flowering in Cerberiopsis candelabra (Apocynaceae), a long-lived monocarpic rain-forest tree?
journal, October 2006

  • Read, Jennifer; Sanson, Gordon D.; Jaffré, Tanguy
  • Journal of Tropical Ecology, Vol. 22, Issue 6
  • DOI: 10.1017/S0266467406003464

Amazon forest response to CO2 fertilization dependent on plant phosphorus acquisition
journal, August 2019


Tachigalia versicolor is a suicidal neotropical tree
journal, August 1977


The limits to tree height
journal, April 2004

  • Koch, George W.; Sillett, Stephen C.; Jennings, Gregory M.
  • Nature, Vol. 428, Issue 6985
  • DOI: 10.1038/nature02417

Darcy's law predicts widespread forest mortality under climate warming
journal, May 2015

  • McDowell, Nathan G.; Allen, Craig D.
  • Nature Climate Change, Vol. 5, Issue 7
  • DOI: 10.1038/nclimate2641

From The Cover: Growth and hydraulic (not mechanical) constraints govern the scaling of tree height and mass
journal, October 2004

  • Niklas, K. J.; Spatz, H. -C.
  • Proceedings of the National Academy of Sciences, Vol. 101, Issue 44
  • DOI: 10.1073/pnas.0405857101

Bioclimate and growth history affect beech lifespan in the I talian A lps and A pennines
journal, November 2011


Evaluation of 11 terrestrial carbon-nitrogen cycle models against observations from two temperate Free-Air CO 2 Enrichment studies
journal, January 2014

  • Zaehle, Sönke; Medlyn, Belinda E.; De Kauwe, Martin G.
  • New Phytologist, Vol. 202, Issue 3
  • DOI: 10.1111/nph.12697

Predicting long-term carbon sequestration in response to CO 2 enrichment: How and why do current ecosystem models differ?
journal, April 2015

  • Walker, Anthony P.; Zaehle, Sönke; Medlyn, Belinda E.
  • Global Biogeochemical Cycles, Vol. 29, Issue 4
  • DOI: 10.1002/2014GB004995

Tropical Forest Census Plots
book, January 1998


A time to grow and a time to die: a new way to analyze the dynamics of size, light, age, and death of tropical trees
journal, October 2009

  • Metcalf, C. Jessica E.; Horvitz, Carol C.; Tuljapurkar, Shripad
  • Ecology, Vol. 90, Issue 10
  • DOI: 10.1890/08-1645.1

Effect of 7 yr of experimental drought on vegetation dynamics and biomass storage of an eastern Amazonian rainforest
journal, June 2010


Recent trends and drivers of regional sources and sinks of carbon dioxide
journal, January 2015


Increased early growth rates decrease longevities of conifers in subalpine forests
journal, August 2009


Long-term decline of the Amazon carbon sink
journal, March 2015

  • Brienen, R. J. W.; Phillips, O. L.; Feldpausch, T. R.
  • Nature, Vol. 519, Issue 7543
  • DOI: 10.1038/nature14283

Limited capacity of tree growth to mitigate the global greenhouse effect under predicted warming
journal, May 2019


Drought Sensitivity of the Amazon Rainforest
journal, March 2009


Tree mortality submodels drive simulated long-term forest dynamics: assessing 15 models from the stand to global scale
journal, February 2019

  • Bugmann, Harald; Seidl, Rupert; Hartig, Florian
  • Ecosphere, Vol. 10, Issue 2
  • DOI: 10.1002/ecs2.2616

Pervasive alteration of tree communities in undisturbed Amazonian forests
journal, March 2004

  • Laurance, William F.; Oliveira, Alexandre A.; Laurance, Susan G.
  • Nature, Vol. 428, Issue 6979
  • DOI: 10.1038/nature02383

Perspectives on the Future of Land Surface Models and the Challenges of Representing Complex Terrestrial Systems
journal, April 2020

  • Fisher, Rosie A.; Koven, Charles D.
  • Journal of Advances in Modeling Earth Systems, Vol. 12, Issue 4
  • DOI: 10.1029/2018MS001453

Determinants of mortality across a tropical lowland rainforest community
journal, March 2011


Simulating Competition and Coexistence between Plant Functional Types in a Dynamic Vegetation Model
journal, May 2006

  • Arora, Vivek K.; Boer, George J.
  • Earth Interactions, Vol. 10, Issue 10
  • DOI: 10.1175/EI170.1

Assessing Evidence for a Pervasive Alteration in Tropical Tree Communities
journal, March 2008


Taking off the training wheels: the properties of a dynamic vegetation model without climate envelopes, CLM4.5(ED)
journal, January 2015

  • Fisher, R. A.; Muszala, S.; Verteinstein, M.
  • Geoscientific Model Development, Vol. 8, Issue 11
  • DOI: 10.5194/gmd-8-3593-2015

Maximum height in a conifer is associated with conflicting requirements for xylem design
journal, August 2008

  • Domec, J. -C.; Lachenbruch, B.; Meinzer, F. C.
  • Proceedings of the National Academy of Sciences, Vol. 105, Issue 33
  • DOI: 10.1073/pnas.0710418105

Greening of the Earth and its drivers
journal, April 2016

  • Zhu, Zaichun; Piao, Shilong; Myneni, Ranga B.
  • Nature Climate Change, Vol. 6, Issue 8
  • DOI: 10.1038/nclimate3004

A Method for Scaling Vegetation Dynamics: the Ecosystem Demography Model (ed)
journal, November 2001


Evidence for age- and size-mediated controls of tree growth from grafting studies
journal, March 2007


Mortality of Large Trees and Lianas Following Experimental Drought in an Amazon Forest
journal, September 2007

  • Nepstad, Daniel C.; Tohver, Ingrid Marisa; Ray, David
  • Ecology, Vol. 88, Issue 9
  • DOI: 10.1890/06-1046.1

Dominance of the suppressed: Power-law size structure in tropical forests
journal, January 2016


The role of gap phase processes in the biomass dynamics of tropical forests
journal, September 2007

  • Feeley, Kenneth J.; Davies, Stuart J.; Ashton, Peter S.
  • Proceedings of the Royal Society B: Biological Sciences, Vol. 274, Issue 1627
  • DOI: 10.1098/rspb.2007.0954

The Community Land Model Version 5: Description of New Features, Benchmarking, and Impact of Forcing Uncertainty
journal, December 2019

  • Lawrence, David M.; Fisher, Rosie A.; Koven, Charles D.
  • Journal of Advances in Modeling Earth Systems, Vol. 11, Issue 12
  • DOI: 10.1029/2018MS001583

Towards a worldwide wood economics spectrum
journal, April 2009


Controls on terrestrial carbon feedbacks by productivity versus turnover in the CMIP5 Earth System Models
journal, January 2015


Influence of tree size, taxonomy, and edaphic conditions on heart rot in mixed-dipterocarp Bornean rainforests: implications for aboveground biomass estimates
journal, January 2015

  • Heineman, K. D.; Russo, S. E.; Baillie, I. C.
  • Biogeosciences Discussions, Vol. 12, Issue 9
  • DOI: 10.5194/bgd-12-6821-2015

Multifeature analyses of vascular cambial cells reveal longevity mechanisms in old Ginkgo biloba trees
journal, January 2020

  • Wang, Li; Cui, Jiawen; Jin, Biao
  • Proceedings of the National Academy of Sciences, Vol. 117, Issue 4
  • DOI: 10.1073/pnas.1916548117

Field-quantified responses of tropical rainforest aboveground productivity to increasing CO 2 and climatic stress, 1997-2009 : TROPICAL RAINFOREST PRODUCTIVITY RESPONSES
journal, May 2013

  • Clark, Deborah A.; Clark, David B.; Oberbauer, Steven F.
  • Journal of Geophysical Research: Biogeosciences, Vol. 118, Issue 2
  • DOI: 10.1002/jgrg.20067

Climate sensitive size-dependent survival in tropical trees
journal, August 2018

  • Johnson, Daniel J.; Needham, Jessica; Xu, Chonggang
  • Nature Ecology & Evolution, Vol. 2, Issue 9
  • DOI: 10.1038/s41559-018-0626-z

Elevated CO2 and tree fecundity: the role of tree size, interannual variability, and population heterogeneity
journal, May 2006


Will the CO2 fertilization effect in forests be offset by reduced tree longevity?
journal, November 2010