Tree Mortality: Revisited Under Changed Climatic and Silvicultural Conditions

Pretzsch, Hans; Grote, Rüdiger

doi:10.1007/124_2023_69

Cited by 7 publications

(1 citation statement)

References 149 publications

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“…The knowledge about the volume loss due to self-thinning and its dependency on site conditions is limited as it requires time-consuming remeasurements of unthinned long-term experiments. Alternatively, the total production can be estimated provisionally based on age-series of temporary plots (Gatzojannis, 1999;Magin, 1964;Pretzsch and Grote, 2023). However, non-recurring inventories or temporary plots can provide only a part of the required information.…”

Section: Introductionmentioning

confidence: 99%

Competition-Based Mortality and Tree Losses. An Essential Component of Net Primary Productivity

Pretzsch

Rı́o²,

Arcangeli³

et al. 2023

Preprint

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Section: Introductionmentioning

confidence: 99%

Competition-Based Mortality and Tree Losses. An Essential Component of Net Primary Productivity

Pretzsch

Rı́o²,

Arcangeli³

et al. 2023

Preprint

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Structural and compositional acclimation of forests to extended drought: results of the KROOF throughfall exclusion experiment in Norway spruce and European beech

Pretzsch,

Ahmed,

Rötzer

et al. 2023

Trees

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Drought effects on tree growth and mortality are widely studied, but scant knowledge exists on its impact on stand density, size variation, or mixing proportions. Grasping drought's influence on structural and compositional diversity is crucial for stand dynamics, ecosystem services, and silvicultural adaptation. We relied on KROOF, a 5-year throughfall exclusion experiment in a mature Norway spruce (Picea abies) and European beech (Fagus sylvatica) stand, to analyze its impact on structural and compositional attributes, including Stand Density Index (SDI), Growth Dominance Coefficient (GDC), and species mixing proportion. Our study demonstrates that drought-induced growth reduction and tree loss decreased SDI by 27%, mixing proportion by 41% at Norway spruce’s expense, and homogenized stand structure. Furthermore, we reveal that stand density, mixing proportion, and structural diversity were more affected in Norway spruce, stabilizing growth at the stand level. Extended drought significantly altered growth partitioning in favor of smaller trees, with a 70% reduction in growth-size relationship slope and a 157% decrease in GDC. Species-level analysis indicated a stronger partitioning shift towards smaller trees, particularly in Norway spruce. We discuss that longer drought periods may trigger acclimation at tree and stand levels, potentially underestimated when based solely on individual drought years. Sustained stress could induce acclimation across various levels, from the stand to the species cohort, tree, and organ. Maintaining structural and compositional diversity may mitigate future drought stress effects on growth, mortality, and stand structure, as exemplified by the extended experimental drought. We suggest silvicultural approaches better attuned to natural processes amid climate change.

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Evaluating the Development and Application of Stand Density Index for the Management of Complex and Adaptive Forests

Chivhenge,

Ray,

Weiskittel

et al. 2024

Curr. For. Rep.

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Tree Mortality: Revisited Under Changed Climatic and Silvicultural Conditions

Cited by 7 publications

References 149 publications

Competition-Based Mortality and Tree Losses. An Essential Component of Net Primary Productivity

Competition-Based Mortality and Tree Losses. An Essential Component of Net Primary Productivity

Structural and compositional acclimation of forests to extended drought: results of the KROOF throughfall exclusion experiment in Norway spruce and European beech

Evaluating the Development and Application of Stand Density Index for the Management of Complex and Adaptive Forests

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