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A global perspective on the climate‐driven growth synchrony of neighbouring trees

AuthorsTejedor, Ernesto; Serrano-Notivoli, Roberto ; Luis, Martín de; Saz, Miguel Ángel; Hartl, Claudia; George, Scott St; Büntgen, Ulf; Liebhold, Andrew M.; Vuille, Mathias; Esper, Jan
tree stress indicator
Issue DateJul-2020
PublisherJohn Wiley & Sons
CitationTejedor E, Serrano-Notivoli R, de Luis M, Saz MA, Hartl C, George S, Büntgen U, Liebhold AM, Vuille M, Esper J. A global perspective on the climate‐driven growth synchrony of neighbouring trees. Global Ecology and Biogeography 29 (7): 1114-1125 (2020)
AbstractAim Previous work demonstrated the global variability of synchrony in tree growth within populations, that is, the covariance of the year‐to‐year variability in growth of individual neighbouring trees. However, there is a lack of knowledge about the causes of this variability and its trajectories through time. Here, we examine whether climate can explain variation in within‐population synchrony (WPS) across space but also through time and we develop models capable of explaining this variation. These models can be applied to the global tree cover under current and future climate change scenarios. Location Global. Time period 1901–2012. Major taxa studied Trees. Methods We estimated WPS values from a global tree‐ring width database consisting of annual growth increment measurements from multiple trees at 3,579 sites. We used generalized linear mixed effects models to infer the drivers of WPS variability and temporal trends of global WPS. We then predicted WPS values across the global extent of tree cover. Finally, we applied our model to predict future WPS based on the RCP 8.5 (2045–2065 period) emission scenario. Results Areas with the highest WPS are characterized by a combination of environments with both high mean annual temperature (>10°C) and low precipitation (<300 mm). Average WPS across all temperate forests has decreased historically and will continue to decrease. Potential implications of these patterns include changes in forest dynamics, such as higher tree growth and productivity and an increase in carbon sequestration. In contrast, the WPS of tropical forests of Central and South America will increase in the near future owing to reduced annual precipitation. Main conclusions Climate explains WPS variability in space and time. We suggest that WPS might have value as an integrative ecological measure of the level of environmental stress to which forests are subjected and therefore holds potential for diagnosing effects of global climate change on tree growth.
Description2 .pdf files: File 1. Author's article final version, Post-Print (19 Pags.- 4 Figs.- 2 Tabls.). File 2. Supplementary Materials (3 Figs.- 2 Tabls.- 1 Model Equation).
Publisher version (URL)https://doi.org/10.1111/geb.13090
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