Continental‐scale tree‐ring‐based projection of Douglas‐fir growth: Testing the limits of space‐for‐time substitution
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Author
Klesse, StefanDeRose, Robert Justin
Babst, Flurin
Black, Bryan A.
Anderegg, Leander D. L.
Axelson, Jodi
Ettinger, Ailene
Griesbauer, Hardy
Guiterman, Christopher H.
Harley, Grant
Harvey, Jill E.
Lo, Yueh‐Hsin
Lynch, Ann M.
O'Connor, Christopher
Restaino, Christina
Sauchyn, Dave
Shaw, John D.
Smith, Dan J.
Wood, Lisa
Villanueva‐Díaz, Jose
Evans, Margaret E. K.
Affiliation
Univ Arizona, Lab Tree Ring ResIssue Date
2020-06-30Keywords
carbon sequestrationclimate sensitivity
Douglas-fir
forest inventory
growth projection
mixed-effects model
tree growth
tree ring
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WileyCitation
Klesse, S, DeRose, RJ, Babst, F, et al. Continental‐scale tree‐ring‐based projection of Douglas‐fir growth: Testing the limits of space‐for‐time substitution. Glob Change Biol. 2020; 26: 5146– 5163. https://doi.org/10.1111/gcb.15170Journal
Global Change BiologyRights
Copyright © 2020 John Wiley & Sons Ltd.Collection Information
This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.Abstract
A central challenge in global change research is the projection of the future behavior of a system based upon past observations. Tree‐ring data have been used increasingly over the last decade to project tree growth and forest ecosystem vulnerability under future climate conditions. But how can the response of tree growth to past climate variation predict the future, when the future does not look like the past? Space‐for‐time substitution (SFTS) is one way to overcome the problem of extrapolation: the response at a given location in a warmer future is assumed to follow the response at a warmer location today. Here we evaluated an SFTS approach to projecting future growth of Douglas‐fir (Pseudotsuga menziesii), a species that occupies an exceptionally large environmental space in North America. We fit a hierarchical mixed‐effects model to capture ring‐width variability in response to spatial and temporal variation in climate. We found opposing gradients for productivity and climate sensitivity with highest growth rates and weakest response to interannual climate variation in the mesic coastal part of Douglas‐fir's range; narrower rings and stronger climate sensitivity occurred across the semi‐arid interior. Ring‐width response to spatial versus temporal temperature variation was opposite in sign, suggesting that spatial variation in productivity, caused by local adaptation and other slow processes, cannot be used to anticipate changes in productivity caused by rapid climate change. We thus substituted only climate sensitivities when projecting future tree growth. Growth declines were projected across much of Douglas‐fir's distribution, with largest relative decreases in the semiarid U.S. Interior West and smallest in the mesic Pacific Northwest. We further highlight the strengths of mixed‐effects modeling for reviving a conceptual cornerstone of dendroecology, Cook's 1987 aggregate growth model, and the great potential to use tree‐ring networks and results as a calibration target for next‐generation vegetation models.Note
12 month embargo; first published: 20 May 2020ISSN
1354-1013EISSN
1365-2486PubMed ID
32433807Version
Final accepted manuscriptSponsors
SK acknowledges the support of the USDA-AFRI grant 2016-67003-24944; MEKE was supported by the National Science Foundation under award DBI-1802893. FB acknowledges statutory funds from the W. Szafer Institute of Botany PAS, as well as support from the project “Inside out” (#POIR.04.04.00-00-5F85/18-00) funded by the HOMING programme of the Foundation for Polish Science, co-financed by the European Union under the European Regional Development Fund.ae974a485f413a2113503eed53cd6c53
10.1111/gcb.15170
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