Forest Dynamics, Growth and Yield

Pretzsch, Hans

doi:10.1007/978-3-540-88307-4

Cited by 762 publications

(646 citation statements)

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“…In order to take into account the spatial distribution of trees, the Clark-Evans aggregation index (R), the spatial size differentiation index for DBH (TD) and height (TH) and the spatial species mingling index (SM) were calculated. the mathematical formulas of each index are presented in Table 4. Species diversity index (H gat ) has a greater value when a higher number of species is present in an area and their proportions are more balanced (Brzeziecki, 2002;Pretzsch 2010). If a stand is made up of one species, the index H gat is equal to 0, whereas its maximum value H max , specifying the maximum diversity of tree species, is equal to ln(S), where S is the number of species.…”

Section: Methodsologymentioning

confidence: 99%

“…stand structure is affected by both external factors (natural disturbances, such as fires and insect infestations) and internal ones (ecological processes, biological and ecological species characteristics, microhabitat variability, etc.) (Müller et al 2000;Montes et al 2004;Zenner 2004;Pretzsch 2010;Petritan et al 2012;Petritan et al 2015;Zenner et al 2014;del rio et al 2015;Fibich et al 2016). In managed forests, an additional factor significantly influencing the stand structure in various stages of development is silvicultural practices (Pretzsch, 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Forest structure is the result of different natural processes relating to its development, but, simultaneously, the forest structure itself also affects these processes (Spies 1998;Naumann, Starlinger 2001;Pommerening 2002;Pretzsch 2010;Gadow et al 2012). These ecological and biological processes occur in various spatial scales and may also overlap, whilst their intensity varies, depending on the stage of the forest development.…”

Section: Introductionmentioning

confidence: 99%

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Structural diversity of selected oak stands (Quercus roburL.) on the Krotoszyn Plateau in Poland

Szmyt

2017

Forest Research Papers

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Abstract. The oak forests growing on the Krotoszyn Plateau are the biggest and most valuable oak forest complexes in Poland. The purpose of this study was to analyze the structural diversity of oak (Q. robur l.) stands older than 140 years. two natural stands located within the forest reserve as well as two managed stands were chosen for investigation. Species and tree size diversity were analyzed using different measures and spatially explicit and inexplicit indices. The results indicate that the structural diversity of the protected oak forests did not differ significantly from that of managed stands. On the contrary, undisturbed natural processes in protected forests can result in a low diversity of some structural attributes in such stands. Although most indices pointed towards a higher structural diversity in protected forests, the differences were not large, especially in the case of spatially explicit indices. The spatial arrangement of live trees was either random, aggregated or regular, with the latter clearly dominating managed, poorly mixed oak stands. Furthermore, a lack of natural disturbances strong hornbeam expansion, in which case strict protection is not favorable for oak sustainability as it creates unsuitable conditions for oak regeneration beneath the hornbeam canopy.

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Section: Methodsologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Structural diversity of selected oak stands (Quercus roburL.) on the Krotoszyn Plateau in Poland

Szmyt

2017

Forest Research Papers

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“…However, comparative analyses of demographic performance of species with contrasting sexual systems in diverse forests at different successional stages are lacking. Further, compared with later successional stages, forest communities in early succession are usually dominated by faster‐growing species and have higher mortality and recruitment, and strongly limited by N and water available (Milton, Laca, & Demment, 1994; Pretzsch, 2009). However, many successional effects cannot be detected if the studies are confined solely to stands of older or younger forest (Milton et al., 1994).…”

Section: Introductionmentioning

confidence: 99%

The role of breeding system in community dynamics: Growth and mortality in forests of different successional stages

Wang

Freckleton

Wang

et al. 2018

Ecology and Evolution

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Plant sexual systems appear to play an important role in community assembly: Dioecious species are found to tend to have a higher propensity to colonize communities in early successional stages. Here, we test two demographic hypotheses to explain this pattern in temperate forests. First, we test demographic differences between hermaphrodite and dioecious species in stressful younger successional stages: Previous theory predicts that hermaphrodite seed production is more harmed in stressful environments than that of dioecious populations leading to an advantage for females of dioecious species. Second, in primary forest, we hypothesized that dioecious species would show demographic advantage over monomorphic ones. We used data from two temperate forest plots in Northeast China surveyed over 10 years to compare the rates of growth and mortality of tree species with contrasting breeding systems in both secondary and primary forests. We assessed the effect of breeding system on the growth‐mortality trade‐off, while controlling for other traits usually considered as correlates of growth and mortality rates. We show that in the secondary forest, dioecious species showed weak advantage in demographic rates compared with monomorphic species; dioecious species showed considerably both lower relative growth and mortality rates compared to the hermaphrodites in the primary forest over 10 years, consistent with a priori predictions. Hermaphrodites showed strong growth‐mortality trade‐offs across forest stages, even when possibly confounding factors had been accounted for. These results suggest that sexual system influences community succession and assembly by acting on the rates of growth and mortality, and the trade‐off between them. As vegetation develops, the demographic differences between breeding systems are much larger. Our results demonstrate the association between breeding system, succession, and community assembly and that this relationship is succession‐stage dependent. Our findings support the suggestion that the demographic advantage of dioecious species facilitates the coexistence of sexual systems in primary forest.

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“…Processbased growth models consist of functions that describe the interactions between trees and their environment, as such, they can represent changes in growth patterns based on changes in the climatic condition (e.g. Kurz et al, 2009;Landsberg and Waring, 1997;Pretzsch, 2010). Several processbased growth models have been developed and are utilized for revealing good forest management practices (e.g.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Growth Responses to Climatic Conditions of Sugi (<i>Cryptomeria japonica</i>) and Hinoki (<i>Chamaecyparis obtusa</i>) Using a Carbon Balance-Based Growth Model

Mitsuda

Hosoda

Iehara

2017

FORMATH

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Abstract:This paper aimed to reveal differences in growth response to climatic condition between sugi (Cryptomeria japonica) and hinoki (Chamaecyparis obtusa) by comparing parameters of a carbon balancebased growth model. Seven carbon balance-based growth model parameters related to the rate of photosynthesis, temperature and humidity controls were parameterized by a Bayesian calibration using growth data derived from permanent plots. A hierarchical Bayes model was applied to this parameterization, where the common parameter was estimated first and the species-specific parameters were derived from the common parameter thereafter. Simulated light-response curves using estimated parameters were similar and the photosynthetic rate of sugi was higher than that of hinoki. The patterns of response to temperature represented by estimated parameters were different between sugi and hinoki; sugi responded rapidly to changes in temperature while hinoki responded relatively slowly, resulting in a higher tolerance to low temperature than sugi. Estimated parameters indicated that the photosynthetic rate controlling function for humidity could not be implemented for either species in the model. The parameterization of a carbon balance-based growth model revealed differences in the potential photosynthetic ability and response to temperature of sugi and hinoki. However, we could not represent the control effect of humidity on the photosynthetic rate.

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Forest Dynamics, Growth and Yield

Cited by 762 publications

References 0 publications

Structural diversity of selected oak stands (Quercus roburL.) on the Krotoszyn Plateau in Poland

Structural diversity of selected oak stands (Quercus roburL.) on the Krotoszyn Plateau in Poland

The role of breeding system in community dynamics: Growth and mortality in forests of different successional stages

Comparison of Growth Responses to Climatic Conditions of Sugi (<i>Cryptomeria japonica</i>) and Hinoki (<i>Chamaecyparis obtusa</i>) Using a Carbon Balance-Based Growth Model

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