Interactions Matter — Complex Effects of Competition, Disturbances, and Climate on Tree Growth

A special issue of Forests (ISSN 1999-4907). This special issue belongs to the section "Forest Ecology and Management".

Deadline for manuscript submissions: closed (28 February 2019)

Special Issue Editors

Università degli Studi di Milano, DISAA Via Celoria 2, 20143 Milan, Italy
Interests: forest dynamics; forest management; simulation modelling; climate change; natural disturbances
Forest dynamics Unit, Swiss Federal Research Institute (WSL), Zurcherstrasse 111, 8903 Birmensdorf, Switzerland
Interests: climate-growth relations; dendrochronology; forest ecology; stand dynamics; quantitative wood anatomy

Special Issue Information

Dear Colleagues,

Tree growth is the keystone ecological process that shapes forest ecosystem structure and drives the provision of ecosystem services to humans by the world forests. Decades of dendroecological research have showed how several biotic and abiotic factors, such as climate, stand dynamics, natural disturbances, and forest management, affect tree development and regulate growth rates. Traditionally, such factors have been analyzed one at a time, while controlling for confounding interactions. However, an increasing body of literature has demonstrated that when two of more factors are taken into account (e.g., by analyzing the effect of competition on growth response to climate), their action is compounded in a non-linear way, generating indirect, threshold, or emergent tipping-point processes.

We now encourage all researchers to contribute to a special issue of the journal Forests that focuses on tree growth response to multiple, interacting factors. Studies using a suite of dendrochronological variables (ring width, wood density, xylem anatomical features, and stable isotopes) are welcome, as long as they investigate the effect of interacting exogenous factors on elements of tree growth. Both retrospective studies and simulation of future growth (validated by dendrochronological techniques) are suitable for the Special issue. The issue will contribute to the advancement of dendrochronology and forest ecology knowledge, helping researchers globally to better understand tree growth patterns and processes under the simultaneous influence of multiple drivers. This will improve our capacity to model forest growth, use tree rings as accurate proxies for ecological and climatic processes, and develop management practices and strategies to face climate change.

Dr. Giorgio Vacchiano
Dr. Daniele Castagneri
Guest Editors

Manuscript Submission Information

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Keywords

  • Tree growth
  • Dendrochronology
  • Dendroecology
  • Xylem anatomy
  • Stable isotopes
  • Natural disturbances
  • Competition Forest management
  • Climate change
  • Extreme events
  • Drought
  • Simulation models

Published Papers (2 papers)

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Research

19 pages, 5099 KiB  
Article
Stand Structure and Composition Affect the Drought Sensitivity of Oregon White Oak (Quercus garryana Douglas ex Hook.) and Douglas-Fir (Pseudotsuga menziesii (Mirb.) Franco)
by Ze’ev Gedalof and Jennifer A. Franks
Forests 2019, 10(5), 381; https://doi.org/10.3390/f10050381 - 30 Apr 2019
Cited by 4 | Viewed by 2582
Abstract
Due to a suite of environmental changes, Oregon white oak (Quercus garryana Douglas ex Hook; called Gary oak in Canada) associated ecosystems at many North American sites are being encroached upon by Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) and other [...] Read more.
Due to a suite of environmental changes, Oregon white oak (Quercus garryana Douglas ex Hook; called Gary oak in Canada) associated ecosystems at many North American sites are being encroached upon by Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco var. menziesii) and other conifer species. Alteration of stand structure and composition is causing substantial changes in the dynamics of these ecosystems, creating an environment in which Oregon white oak is not thriving. In this study we used dendrochronology to investigate the competitive dynamics between Oregon white oak and Douglas-fir in a mixed forest stand on Southern Vancouver Island. Significant species-specific differences in radial growth sensitivity to drought were found between Oregon white oak and Douglas-fir. Oregon white oak trees growing at high densities, or competing with Douglas-fir for moisture were found to be more sensitive to drought and more sensitive to growing conditions during the prior year. The response of Douglas-fir to drought was less variable, possibly due to the relatively low conifer densities at our study site, as well as the species’ ability to root graft, its higher shade tolerance than Oregon white oak, and its rapid growth rates that allow it to achieve a more dominant canopy position. The non-stationary response to climate exhibited by Oregon white oak provides insights into the mechanisms by which Oregon white oak savannas are being converted to coniferous woodland, but also suggest that tree-ring reconstructions of climate need to explicitly address changes in stand dynamics that could influence the growth–climate relationship Full article
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19 pages, 10940 KiB  
Article
Relationships between Tree Age and Climate Sensitivity of Radial Growth in Different Drought Conditions of Qilian Mountains, Northwestern China
by Lingnan Zhang, Yuan Jiang, Shoudong Zhao, Liang Jiao and Yan Wen
Forests 2018, 9(3), 135; https://doi.org/10.3390/f9030135 - 12 Mar 2018
Cited by 29 | Viewed by 3895
Abstract
The response of radial growth to climate and the climate sensitivity of tree growth at different ages in different drought conditions are essential for predicting forest dynamics and making correct forest management policies. In this study, we analyzed the growth responsiveness of Picea [...] Read more.
The response of radial growth to climate and the climate sensitivity of tree growth at different ages in different drought conditions are essential for predicting forest dynamics and making correct forest management policies. In this study, we analyzed the growth responsiveness of Picea crassifolia Kom. to climate and explored the relationship between age and climate sensitivity of radial growth at the individual tree scale in the wetter eastern area and drier western area of the Qilian Mountains. Pearson correlation coefficients were calculated between the chronology of each tree and climatic factors to examine the climate-growth relationships. Linear fitting, quadratic polynomial fitting and exponential fitting were used to test the relationships between age and mean sensitivity, standard deviation and radial growth’s response to climate. Trees in the wetter eastern area showed a weaker response to climate than those in the drier western area and were significantly correlated with precipitation and mean temperature in the previous and current mid-late summer. Trees in the drier western area were mainly limited by precipitation of the previous August, the current May and June, as well as limited by temperature in the previous and current early-middle summer. In the wetter area, the younger trees were more sensitive to both precipitation and temperature than the older trees. In the drier area, younger/older trees showed a stronger sensitivity to precipitation in the current August and September/May, whereas trees 120–140 years old showed a stronger correlation with temperature factors in the summer. It was determined that mature trees in the drier area were more strongly influenced by the climate, especially in the context of increasing temperature. These trees should be paid special attention in forest management. Full article
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