State and Change of Forest Resources

Herold, Anne; Zell, Jürgen; Rohner, Brigitte; Didion, Markus; Thürig, Esther; Rösler, Erik

doi:10.1007/978-3-030-19293-8_12

Cited by 10 publications

(19 citation statements)

References 5 publications

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“…The TLS-derived AGB was compared with allometry-based estimates following species-specific allometric equations established by the Swiss NFI ( Herold et al , 2019 ). The fit between allometry-based AGB estimates and reference AGB [ R 2 = 0.837, RMSE = 1159 kg (with respect to 1:1 line)] is shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Estimates of AGB based on the QSM approach were compared with AGB estimates based on species- and region-specific allometric equations. For this purpose, species-specific allometric tariff models established for the Swiss National Forest Inventory (NFI) published in Kaufmann (2001) and Herold et al (2019) were used to derive stem volumes. These tariff models were established for forest trees.…”

Section: Methodsmentioning

confidence: 99%

“…The species-specific model parameters (

), as published in Herold et al , (2019) are given for the Swiss Plateau in Appendix Table A2 . The estimated stem volumes

were then expanded to total tree AGB using the measured basic wood density and a tree type-specific (coniferous or deciduous) biomass expansion factor:…”

Section: Methodsmentioning

confidence: 99%

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Above-ground biomass references for urban trees from terrestrial laser scanning data

et al. 2021

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Background and Aims Within extending urban areas, trees serve a multitude of functions (e.g. carbon storage, suppression of air pollution, mitigation of the ‘heat island’ effect, oxygen, shade and recreation). Many of these services are positively correlated with tree size and structure. The quantification of above-ground biomass (AGB) is of especial importance to assess its carbon storage potential. However, quantification of AGB is difficult and the allometries applied are often based on forest trees, which are subject to very different growing conditions, competition and form. In this article we highlight the potential of terrestrial laser scanning (TLS) techniques to extract highly detailed information on urban tree structure and AGB. Methods Fifty-five urban trees distributed over seven cities in Switzerland were measured using TLS and traditional forest inventory techniques before they were felled and weighed. Tree structure, volume and AGB from the TLS point clouds were extracted using quantitative structure modelling. TLS-derived AGB estimates were compared with AGB estimates based on forest tree allometries dependent on diameter at breast height only. The correlations of various tree metrics as AGB predictors were assessed. Key Results Estimates of AGB derived by TLS showed good performance when compared with destructively harvested references, with an R2 of 0.954 (RMSE = 556 kg) compared with 0.837 (RMSE = 1159 kg) for allometrically derived AGB estimates. A correlation analysis showed that different TLS-derived wood volume estimates as well as trunk diameters and tree crown metrics show high correlation in describing total wood AGB, outperforming tree height. Conclusions Wood volume estimates based on TLS show high potential to estimate tree AGB independent of tree species, size and form. This allows us to retrieve highly accurate non-destructive AGB estimates that could be used to establish new allometric equations without the need for extensive destructive harvesting.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Above-ground biomass references for urban trees from terrestrial laser scanning data

et al. 2021

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“…Our study demonstrated the capacity of the new DSS prototype to provide enterprise-specific scenario estimates under changing climate and alternative management strategies, enabling stakeholders to take scientifically well-founded decisions for sustainable forest management. In particular, the new DSS offers: (1) a stronger link to inventory data and forest growth conditions in Switzerland by incorporating the new forest model SwissStandSim (Zell et al, 2020), the stand initialization approach by Mey et al (2021) and the allometric functions for tree biomass and carbon content based on the latest national forest inventory (Didion et al, 2019;Herold et al, 2019), (2) a climate sensitive framework, which is of increasing importance for strategic planning (Mina et al, 2017), (3) a widened portfolio of BES indicators, integrating also the socially important recreation function (e.g., Hegetschweiler et al, 2020), as well as an updated framework for harvested wood products and substitution effects for carbon sequestration (FOEN, 2020), and (4) a revised MCDA framework allowing stakeholders to perform trade-off analyses under different management strategies and weighting preferences. Altogether, the new DSS provides a flexible and dynamic tool for strategic (i.e., long-term) planning of sustainable forest management under changing climatic conditions and political/strategic goals.…”

Section: Discussionmentioning

confidence: 99%

“…For carbon sequestration, the amount of carbon in living aboveground and belowground tree biomass was calculated using species-, region-and elevation-specific allometric equations from the Swiss National Forest Inventory (Didion et al, 2019;Herold et al, 2019), as well as deadwood originating from natural mortality and harvest residues. Using an adapted approach of Blattert et al (2018), furthermore carbon stored in three harvested wood product pools (sawnwood, wood-based panels, paper and paperboard, classification by UNFCCC, see IPCC, 2014a) as well as substitution effects were considered, with energy wood substituting fossil fuel emissions and construction wood substituting emissions by fossil-fuel intensive construction materials (e.g., concrete, steel) (Taverna et al, 2007).…”

Section: Bes Indicatorsmentioning

confidence: 99%

A Multi-Criteria Decision Support System for Strategic Planning at the Swiss Forest Enterprise Level: Coping With Climate Change and Shifting Demands in Ecosystem Service Provisioning

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et al. 2021

Front. For. Glob. Change

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Sustainable forest management plays a key role for forest biodiversity and the provisioning of ecosystem services (BES), including the important service of carbon sequestration for climate change mitigation. Forest managers, however, find themselves in the increasingly complex planning situation to balance the often conflicting demands in BES. To cope with this situation, a prototype of a decision support system (DSS) for strategic (long-term) planning at the forest enterprise level was developed in the present project. The DSS was applied at three case study enterprises (CSEs) in Northern Switzerland, two lowland and one higher-elevation enterprise, for a 50-year time horizon (2010 to 2060) under present climate and three climate change scenarios (‘wet’, ‘medium’, ‘dry’). BES provisioning (for biodiversity, timber production, recreation, protection against gravitational hazards and carbon sequestration) was evaluated for four management scenarios (no management, current (BAU), lower and higher management intensity) using a utility-based multi-criteria decision analysis. Additionally, four alternative preference scenarios for BES provisioning were investigated to evaluate the robustness of the results to shifting BES preferences. At all CSEs, synergies between carbon sequestration, biodiversity and protection function as well as trade-offs between carbon sequestration and timber production occurred. The BAU management resulted in the highest overall utility in 2060 for different climate and BES preference scenarios, with the exception of one lowland CSE under current BES preference, where a lower intensity management performed best. Although climate change had a relatively small effect on overall utility, individual BES indicators showed a negative climate change impact for the lowland CSEs and a positive effect for the higher elevation CSE. The patterns of overall utility were relatively stable to shifts in BES preferences, with exception of a shift toward a preference for carbon sequestration. Overall, the study demonstrates the potential of the DSS to investigate the development of multiple BES as well as their synergies and trade-offs for a set of lowland and mountainous forest enterprises. The new system incorporates a wide set of BES indicators, a strong empirical foundation and a flexible multi-criteria decision analysis, enabling stakeholders to take scientifically well-founded decisions under changing climatic conditions and political goals.

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Tree species admixture increases ecosystem service provision in simulated spruce- and beech-dominated stands

et al. 2022

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Climate-adaptive forest management aims to sustain the provision of multiple forest ecosystem services and biodiversity (ESB). However, it remains largely unknown how changes in adaptive silvicultural interventions affect trade-offs and synergies among ESB in the long term. We used a simulation-based sensitivity analysis to evaluate popular adaptive forest management interventions in representative Swiss low- to mid-elevation beech- and spruce-dominated forest stands. We predicted stand development across the twenty-first century using a novel empirical and temperature-sensitive single-tree forest stand simulator in a fully crossed experimental design to analyse the effects of (1) planting mixtures of Douglas-fir, oak and silver fir, (2) thinning intensity, and (3) harvesting intensity on timber production, carbon storage and biodiversity under three climate scenarios. Simulation results were evaluated in terms of multiple ESB provision, trade-offs and synergies, and individual effects of the adaptive interventions. Timber production increased on average by 45% in scenarios that included tree planting. Tree planting led to pronounced synergies among all ESBs towards the end of the twenty-first century. Increasing the thinning and harvesting intensity affected ESB provision negatively. Our simulations indicated a temperature-driven increase in growth in beech- (+ 12.5%) and spruce-dominated stands (+ 3.7%), but could not account for drought effects on forest dynamics. Our study demonstrates the advantages of multi-scenario sensitivity analysis that enables quantifying effect sizes and directions of management impacts. We showed that admixing new tree species is promising to enhance future ESB provision and synergies among them. These results support strategic decision making in forestry.

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State and Change of Forest Resources

Cited by 10 publications

References 5 publications

Above-ground biomass references for urban trees from terrestrial laser scanning data

Above-ground biomass references for urban trees from terrestrial laser scanning data

A Multi-Criteria Decision Support System for Strategic Planning at the Swiss Forest Enterprise Level: Coping With Climate Change and Shifting Demands in Ecosystem Service Provisioning

Tree species admixture increases ecosystem service provision in simulated spruce- and beech-dominated stands

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