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ArticleJournal articleThe change in forest productivity and stand-dynamics under climate change in East Asian temperate forests: A case study from South Korean forests
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The velocity and impact of climate change on forest appear to be site, environment, and tree species-specific.The primary objective of this research is to assess the changes in productivity of major temperate tree species in South Korea using terrestrial inventory and satellite remote sensing data. The area covered by each tree species was further categorized into either lowland forest (LLF) or high mountain forest (HMF) and investigated. We used the repeated Korean national forest inventory (NFI) data to calculate a stand-level annual increment (SAI). We then compared the SAI, a ground-based productivity measure, to MODIS net primary productivity (NPP) as a measure of productivity based on satellite imagery. In addition, the growth index of each increment core, which eliminated the effect of tree age on radial growth, was derived as an indicator of the variation of productivity by tree species over the past four decades. Based on these steps, we understand the species- and elevation-dependent dynamics. The secondary objective is to predict the forest dynamics under climate change using the Perfect Plasticity Approximation with Simple Biogeochemistry (PPA- SiBGC) model. The PPA-SiBGC is an analytically tractable model of forest dynamics, defined in terms of parameters for individual trees, including allometry, growth, and mortality. We estimated these parameters for the major species by using NFI and increment core data. We predicted forest dynamics using the following time-series metrics: Net ecosystem exchange, aboveground biomass, belowground biomass, C, soil respiration, and relative abundance. We then focus on comparing the impact of climate change on LLF and HMF. The results of our study can be used to develop climate-smart forest management strategies to ensure that both LLF and HMF continue to be resilient and continue to provide a wide range of ecosystem services in the Eastern Asian region. Keywords: mountain forests, lowland forests, increment core, national forest inventory, MODIS NPP ID: 3486900 -
DocumentOther documentEconomic analysis of adaptation options toward drought-induced risk in forest: financial balance and/or carbon balance
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Forests provide ecosystem services that contribute to human well-being and reduce social vulnerability. Nowadays, the pace of changes induced by climate change is being too fast for a natural and spontaneous forest adaptation.
Drought is a natural phenomenon affecting forest productivity and health especially when its intensity is extreme. In Europe, trees are suffering from severe water shortage occurring particularly in early summer. While drought is considered as one of the main damaging abiotic risks, its induced impacts on forest health have been underestimated for a very long time due to inconspicuous damage at first sight.
In this context, forests need adaptation to reduce vulnerability to drought-induced dieback and to anticipate and cope with this increasing risk.
Different adaptation strategies were tested and combined through forest-management-based and market-based adaptations using original methods.
This thesis provided the following main results for the considered case studies and under some assumptions. First, the results proved that adaptation is relevant to face drought-induced risk of dieback: Adaptation, both forest-management-based and market-based, provides always the best scenario as opposed to the baseline or the “do-nothing” scenario from an economic perspective. Second, combining forest-management-based adaptation strategies appeared as a relevant way to adapt forests in view of a drought-induced risk of forest dieback. The combination of different strategies was therefore more beneficial for the forest owner than each strategy separately (synergy vs. additionality). However, not all adaptation options appear relevant (i.e. maladaptation). In the same vein, while forest insurance against drought-induced risk can be an option, the low gain of current contracts cannot provide enough incentive for forest owners to adopt these insurance contracts. Keywords: Adaptive and integrated management, Climate change, Research, Sustainable forest management ID: 3482552 -
DocumentOther documentHow is human breathable air changed by forests?: The characteristics of natural VOC in birch forests
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Since the outbreak of new viruses that cause highly infectious diseases among humans, such as SARS and COVID-19, people are increasingly interested in healthy living surrounded by nature. The pursuit of physical comfort is instinctive in most human beings; therefore, the influence of natural environment on humans is significant. Terms such as healing forest and forest medicine are associated with forests in some countries. Natural VOC, representing the healing forest factor, are widely known as phytoncide in Korea. Several studies have shown that NVOC emitted from forests have various beneficial effects such as disease prevention and health improvement.
In this study, 380 samples were collected and analyzed to examine the characteristics of NVOC emitted from forest in Inje where many citizens visit to enjoy landscape. In this study, NVOC were analyzed in November 2018, May and July 2019, and measurements were performed at three different locations considering movement of citizens. Using mini pump and stainless steel tube filled with Tenax TA, 9L of NVOC was collected at a speed of 150mL/min.
The analysis of NVOC composition in forest on an annual basis showed that it comprised α-pinene 27%, camphor 10%, and β-pinene 9%. Examination of the pattern of intraday NVOC concentration revealed that it was relatively high in the afternoon and increased when photoenvironment changed, where as the influence of wind speed. Evaluation of the correlation between the NVOC concentration and the microclimate in the forest showed that the concentration increased markedly with the increase in temperature and humidity, and the concentration decreased with the increase in wind speed. When the NVOC emission tendency of the birch forest was analyzed by season, high NVOC concentrations were detected in summer. In conclusion, these results can be used as basic data for the technical development of forest space management related to the establishment of forest healing spaces in the future. Keywords: Human health and well-being, Monitoring and data collection, Covid-19, One Health ID: 3477860
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