Bayesian and classical biomass allometries for open grown valonian oaks (Q. ithaburensis subs. macrolepis L.) in a silvopastoral system

Zianis, Dimitris; Pantera, Anastasia; Papadopoulos, Andreas; Losada, María Rosa Mosquera

doi:10.1007/s10457-016-0060-7

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…The importance of HNCV agroforestry to store soil carbon has also been noted for the hedgerows of Spreewald floodplain and for different Mediterranean wood pastures (e.g. Howlett et al 2011;Seddaiu et al 2013;Francaviglia et al 2014;Zianis et al 2017).…”

Section: 1mentioning

confidence: 87%

Agroforestry systems of high nature and cultural value in Europe: provision of commercial goods and other ecosystem services

Aviron²,

et al. 2017

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Land use systems that integrate woody vegetation with livestock and/or crops and are recognised for their biodiversity and cultural importance can be termed high nature and cultural value (HNCV) agroforestry. In this review, based on the literature and stakeholder knowledge, we describe the structure, components and management practices of ten contrasting HNCV agroforestry systems distributed across five European bioclimatic regions. We also compile and categorize the ecosystem services provided by these agroforestry systems, following the Common International Classification of Ecosystem Services. HNCV agroforestry in Europe generally enhances biodiversity and regulating ecosystem services relative to conventional agriculture and forestry. These systems can reduce fire risk, compared to conventional forestry, and can increase carbon sequestration, moderate the microclimate, and reduce soil erosion and nutrient leaching compared to conventional agriculture. However, some of the evidence is location specific and a better geographical coverage is needed to generalize patterns at broader scales. Although some traditional practices and products have been abandoned, many of the studied systems continue to provide multiple woody and non

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Section: 1mentioning

confidence: 87%

Agroforestry systems of high nature and cultural value in Europe: provision of commercial goods and other ecosystem services

Aviron²,

et al. 2017

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“…The calibration, accuracy and adaptability of these models for trees growing in silvopastoral systems have been the subject of several studies in the recent past, but more site and systemspecific information is needed. Within this perspective, Zianis et al (2019) tested classical and Bayesian allometric approaches to estimate the aboveground biomass of valonian oak trees growing in Mediterranean silvopastoral systems. They compared the biomass and trees characteristics estimated by the different approaches to actual biomass of 25 oaks that were destructively sampled.…”

Section: Environmental Benefitsmentioning

confidence: 99%

Silvopasture: a sustainable livestock production system

2019

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Silvopasture, as an integrated land use practice that combines trees, forage and livestock, has been in existence for millennia. There are many variants of this land use in both the temperate and tropical regions of the world practiced at small and large scales. Modern silvopasture; however, is not just a new name for an old practice. It is rooted in sound ecological principles and demands skills in managing complexity. Scientific evidence of the ecological and economic benefits of silvopasture has been accumulating rapidly over the last few years and hence the objective of this thematic issue was to bring together a collection of original research and review articles that dealt with these different dimensions. There are 28 articles included in this thematic issue categorized into four groups based on their primary focus, (1) forage production and quality (2) livestock performance (3) environmental benefits, and (4) challenges in designing and developing silvopasture. The information presented has deepened our understanding of some of the biophysical and socioeconomic dimensions of silvopastoral systems; however, it also has revealed some of the research gaps. Addressing these research gaps will help improve not only the economic and environmental sustainability of these systems, but their social acceptability as well.

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“…Compared to random intercept model, the Bayesian approach does not need the observations (biomass data) from other locations; it only needs the parameter values (it could be either theoretical or estimated) which can be integrated with new local information. Therefore, the Bayesian approach can be more versatile, as demonstrated by [26].…”

Section: Introductionmentioning

confidence: 99%

Allometric Biomass Models for European Beech and Silver Fir: Testing Approaches to Minimize the Demand for Site-Specific Biomass Observations

Dutcă

Zianis

Petriţan

et al. 2020

Forests

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In this paper, site-specific allometric biomass models were developed for European beech (Fagus sylvatica L.) and silver fir (Abies alba Mill.) to estimate the aboveground biomass in Șinca virgin forest, Romania. Several approaches to minimize the demand for site-specific observations in allometric biomass model development were also investigated. Developing site-specific allometric biomass models requires new measurements of biomass for a sample of trees from that specific site. Yet, measuring biomass is laborious, time consuming, and requires extensive logistics, especially for very large trees. The allometric biomass models were developed for a wide range of diameters at breast height, D (6–86 cm for European beech and 6–93 cm for silver fir) using a logarithmic transformation approach. Two alternative approaches were applied, i.e., random intercept model (RIM) and a Bayesian model with strong informative priors, to enhance the information of the site-specific sample (of biomass observations) by supplementing with a generic biomass sample. The appropriateness of each model was evaluated based on the aboveground biomass prediction of a 1 ha sample plot in Șinca forest. The results showed that models based on both D and tree height (H) to predict tree aboveground biomass (AGB) were more accurate predictors of AGB and produced plot-level estimates with better precision, than models based on D only. Furthermore, both RIM and Bayesian approach performed similarly well when a small local sample (of seven smallest trees) was used to calibrate the allometric model. Therefore, the generic biomass observations may effectively be combined with a small local sample (of just a few small trees) to calibrate an allometric model to a certain site and to minimize the demand for site-specific biomass measurements. However, special attention should be given to the H-D ratio, since it can affect the allometry and the performance of the reduced local sample approach.

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Bayesian and classical biomass allometries for open grown valonian oaks (Q. ithaburensis subs. macrolepis L.) in a silvopastoral system

Cited by 6 publications

References 34 publications

Agroforestry systems of high nature and cultural value in Europe: provision of commercial goods and other ecosystem services

Agroforestry systems of high nature and cultural value in Europe: provision of commercial goods and other ecosystem services

Silvopasture: a sustainable livestock production system

Allometric Biomass Models for European Beech and Silver Fir: Testing Approaches to Minimize the Demand for Site-Specific Biomass Observations

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