Individual-based approach as a useful tool to disentangle the relative importance of tree age, size and inter-tree competition in dendroclimatic studies

Rozas, Vicente

doi:10.3832/ifor1249-007

Cited by 35 publications

(27 citation statements)

References 47 publications

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“…Secondary growth and climate-growth relationship were modulated by similar tree and neighbourhood characteristics. Therefore, trees showing the highest growth rates presented the highest sensitivity to climate, as previously reported [9]. The effect of tree-level factors on climate-growth relationship could be related to each species' traits.…”

Section: Individual Tree Responses To Climatesupporting

confidence: 72%

“…Pedunculate oaks showed the largest variation in the individual growth responses, and the best individual climate-growth relationships models (accounting for a greater proportion of the total variation). Thicker and taller pedunculate oaks, with access to more resources and higher growth rates, showed higher sensitivity to the April temperature and summer precipitation [9]. The same factors enhanced the negative effect of April hail because of the increased exposure of the dominant large canopy trees.…”

Section: Individual Tree Responses To Climatementioning

confidence: 91%

“…These approaches share a similar population-based approach, regarding the individual variability as noise [7], and magnifying the common signal shared by coexisting trees [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…Climate and competition are the two major drivers that limit tree growth, but competition from neighbours may cause a greater reduction in growth than climate, at least in temperate forests [9,[22][23][24]. However, competition for limiting resources and climatic stress, are interrelated factors [9,23,25]. Dense stands with high competition magnify the effect of extreme weather events (e.g., drought) on growth [20,23,24,26,27].…”

Section: Introductionmentioning

confidence: 99%

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Variation in the Climate Sensitivity Dependent on Neighbourhood Composition in a Secondary Mixed Forest

Laskurain

Aldezábal

Odriozola

et al. 2018

Forests

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Understanding the vulnerability of individual trees to climate requires moving from population to individual level. This study evaluates individual tree response in a mixed forest by assessing how size and neighbourhood density modulated growth responses to climate among coexisting tree species. To understand the complete variation in growth responses to climate, it is necessary to consider intrapopulation variability. Trees respond as individual entities, and their response is modulated by their characteristics and neighbourhood context. To assess the individual climate sensitivity, all living Iberian birches, European beeches, and pedunculate oaks trees located in a temperate mixed forest were cored in four 40 m × 40 m plots. Standard ring-width chronologies were built at tree and species level for the 1977-2007 period. Chronologies were related to climatic variables (monthly precipitation, hailstorm and mean temperature, and summer (June-August) precipitation). Growth response to climate varied among species and individual trees. Differences in climate-growth relationship among species could be partially attributed to the different xylem anatomy, since secondary growth of ring-porous pedunculate oak (Quercus robur L.) was mainly dependent on the previous-winter climatic conditions (January temperature), while for the diffuse-porous Iberian birch (Betula celtiberica Rothm. and Vasc.) and European beech (Fagus sylvatica L.), spring temperature and summer precipitation were the major constraining factors of growth. Tree features and identity of neighbourhood modulated climatic response, especially for Iberian birch and pedunculate oak. Dominant trees in less crowded neighbourhoods responded more intensely to climate factors. Understanding the individual variability of growth responses to climate will provide more realistic predictions of forests response to climate change.

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Section: Individual Tree Responses To Climatesupporting

confidence: 72%

Section: Individual Tree Responses To Climatementioning

confidence: 91%

“…These approaches share a similar population-based approach, regarding the individual variability as noise [7], and magnifying the common signal shared by coexisting trees [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Variation in the Climate Sensitivity Dependent on Neighbourhood Composition in a Secondary Mixed Forest

Laskurain

Aldezábal

Odriozola

et al. 2018

Forests

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“…The effects of tree developmental stage (i.e., increasing tree size) were filtered out as they were related to a decline in forest productivity and to an increased sensitivity to disturbances [16,17,19,20]. Consequently, the highlighted changes cannot be attributed to size-or age-related processes.…”

Section: Discussionmentioning

confidence: 99%

Major Changes in Growth Rate and Growth Variability of Beech (Fagus sylvatica L.) Related to Soil Alteration and Climate Change in Belgium

Latte

Perin

Kint

et al. 2016

Forests

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Global change-particularly climate change, forest management, and atmospheric deposition-has significantly altered forest growing conditions in Europe. The influences of these changes on beech growth (Fagus sylvatica L.) were investigated for the past 80 years in Belgium, using non-linear mixed effects models on ring-width chronologies of 149 mature and dominant beech trees (87-186 years old). The effects of the developmental stage (i.e., increasing tree size) were filtered out in order to focus on time-dependent growth changes. Beech radial growth was divided into a low-frequency signal (=growth rate), mainly influenced by forest management and atmospheric deposition, and into a high-frequency variability («mean sensitivity), mainly influenced by climate change. Between 1930 and 2008, major long-term and time-dependent changes were highlighted. The beech growth rate has decreased by about 38% since the 1950-1960s, and growth variability has increased by about 45% since the 1970-1980s. Our results indicate that (1) before the 1980s, beech growth rate was not predominantly impacted by climate change but rather by soil alteration (i.e., soil compaction and/or nitrogen deposition); and (2) since the 1980s, climate change induced more frequent and intense yearly growth reductions that amplified the growth rate decrease. The highlighted changes were similar in the two ecoregions of Belgium, although more pronounced in the lowlands than in the uplands.

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Quantifying the effects of drought on abrupt growth decreases of major tree species in Switzerland

Vanoni

Bugmann

Nötzli

et al. 2016

Ecology and Evolution

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Drought entails important effects on tree physiology, which may result in short‐ to long‐term radial growth decreases. While the majority of studies have focused on annual drought‐related variability of growth, relatively little is known about sustained growth decreases following drought years. We apply a statistical framework to identify climatic factors that induce abrupt growth decreases and may eventually result in tree mortality. We used tree‐ring data from almost 500 standing dead trees and 200 living trees in eight sites of the Swiss network of strict forest reserves, including four of the most important Central European tree species (Abies alba, Picea abies, Fagus sylvatica and Quercus spp.). First, to assess short‐term growth responses to drought under various climate and site conditions, we calculated correlations and linear mixed‐effects models between ring‐width indices (RWIs) and drought based on the Standardized Precipitation Evapotranspiration Index (SPEI). Second, to quantify drought effects on abrupt growth decreases, we applied distributed lag nonlinear models (DLNMs), which account for both delayed effects and the nonlinear relationship between the SPEI and the occurrence of abrupt growth decreases. Positive correlations between RWIs and the SPEI indicated short‐term growth responses of all species, particularly at arid sites. Results of the DLNMs revealed species‐specific growth responses to drought. For Quercus spp., abrupt growth decreases were more likely to occur several years following severe drought, whereas for P. abies, A. alba, and F. sylvatica abrupt growth decreases started frequently immediately in the drought year. We conclude that the statistical framework allows for quantifying the effects of drought intensity on the probability of abrupt growth decreases, which ultimately contributes to an improved understanding of climate impacts on forest community dynamics.

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Individual-based approach as a useful tool to disentangle the relative importance of tree age, size and inter-tree competition in dendroclimatic studies

Cited by 35 publications

References 47 publications

Variation in the Climate Sensitivity Dependent on Neighbourhood Composition in a Secondary Mixed Forest

Variation in the Climate Sensitivity Dependent on Neighbourhood Composition in a Secondary Mixed Forest

Major Changes in Growth Rate and Growth Variability of Beech (Fagus sylvatica L.) Related to Soil Alteration and Climate Change in Belgium

Quantifying the effects of drought on abrupt growth decreases of major tree species in Switzerland

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