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Tree growth sensitivity to climate varies across a seasonal precipitation gradient

  • Physiological ecology – original research
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Abstract

Spatial patterns of precipitation in the southwestern United States result in a complex gradient from winter-to-summer moisture dominance that influences tree growth. In response, tree growth exhibits seasonal-to-annual variability that is evident in the growth of whole tree rings, and in sub-annual sections such as earlywood and latewood. We evaluated the influence of precipitation and temperature on the growth of Pinus ponderosa trees in 11 sites in the southwestern US. Precipitation during the year of growth and the prior year accounted for about half of the climate influence on annual growth, with the other half reflecting conditions 2–4 years prior to growth, indicating that individual trees do indeed exhibit multi-year “memory” of climate. Trees in wetter sites exhibited weaker influence of past precipitation inputs, but longer memory of climatic variability. Conversely, trees in dry sites exhibited shorter memory of long-term climatic variability, but greater sensitivity to past precipitation effects. These results are consistent with the existence of complex interactions between endogenous (phenotype) effects and exogenous (climate) effects in controlling climate memory in trees. After accounting for climate, residual variability in latewood growth was negatively correlated with earlywood growth, indicating a potential tradeoff between latewood versus earlywood growth. This study provides new insights that will assist the accurate prediction of woody biomass growth and forest carbon sequestration across a southwestern US precipitation gradient.

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Availability of data and material

All data for this manuscript will be posted in the International Tree-Ring Database (ITRDB).

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Code is available from corresponding author upon request.

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Acknowledgements

We thank the Ogle lab group for feedback on earlier versions of this manuscript. This manuscript has been authored in part by UT-Battelle, LLC, under contract DE-AC05-00OR22725 with the US Department of Energy (DOE). The US government retains and the publisher, by accepting the article for publication, acknowledges that the US government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for US government purposes. DOE will provide public access to these results of federally sponsored research in accordance with the DOE Public Access Plan (http://energy.gov/downloads/doe-public-access-plan).

Funding

The majority of the work conducted in this study was funded by a National Science Foundation-Advances in Biological Informatics grant to K. Ogle (#1458867). P. Szejner and R. Monson acknowledge financial support from the Macrosystems Program in the Emerging Frontiers Section of the U.S. National Science Foundation (#1065790) and the Ecosystems Program in the Division of Environmental Biology (#1754430), which enabled much of the sampling and data collection. Y. Liu was partly supported by the U.S. Department of Energy contract DE-AC05-00OR22725.

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Contributions

LLY and KO conceived of the idea. PS and RKM collected the data. LLY, KO and DP analyzed the data. LLY wrote the manuscript; all authors provided editorial advice.

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Correspondence to Larissa Yocom.

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The authors declare that they have no conflict of interest.

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Ethics approval was not required for this study.

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Additional information

Communicated by Christiane Roscher.

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Supplementary file1 (DOCX 739 KB)

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Yocom, L., Ogle, K., Peltier, D. et al. Tree growth sensitivity to climate varies across a seasonal precipitation gradient. Oecologia 198, 933–946 (2022). https://doi.org/10.1007/s00442-022-05156-1

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  • DOI: https://doi.org/10.1007/s00442-022-05156-1

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