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Community resilience to changes in forest public policies: The case of ejidos in northern Mexico

XV World Forestry Congress, 2-6 May 2022









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    Article
    Improvement of the forest cover-changes cartography from global forest change for critical deforestation regions in Mexico. Case of the Lacandona Region 2014-2021
    XV World Forestry Congress, 2-6 May 2022
    2022
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    Global Forest Change (GFC) is a global monitoring system with moderate resolution (Landsat, 30 m pixel) that allows knowing the location and magnitude of the losses or gains of global forest cover. Critical Forest Change (CFC) is a calibration system based on comprehensive photo interpretation (1:10,000 scale for change editing, and 1:5,000 scale for interpretation- confirmation of change strata), with diagnostic criteria supported by field data of the National Forest Inventory (scale 1:1, period 2014-2021). CFC reduces until 85.8% the overestimation of the forest loss of GFC in the case of the Lacandona Region (327,646 ha). The process included the analysis of data at 330 study sites and the interpretation of 1,190 frames of Spot-6 (April 28, 2014) versus Sentinel-2 (April 24, 2021) in higher resolution (10 m). The annual rate of forest loss obtained by GFC (4,526 ha.yr-1) is 1.87 times higher than the LFC rate (2,415 ha.yr-1). Through a comparative analysis between the cartography of GFC and CFC, it was possible to identify that 19.2% of the differences correspond to phenological changes (leaf fall deciduous, greenness variation, or alteration of the biomass due to eventual changes in humidity). 31.3% by Landsat spatial resolution limitations, 3.8% occurs in changes by industrial plantations, 11.6% of the differences can reduce by eliminating the GFC residuals outside the forest FAO definition (changes less than 0.5 ha), 7.4% of the differences correspond to atmospheric noise in the interpreted images, 6.8% to visual omissions and 19.9% there are no changes by interpretation. The cartographic adjustment of GFC by CFC is relatively fast (1,000 ha.hr-1 per photointerpreter-expert). Its implementation improves the spatial coherence, periodicity, and legibility of the areas of change, strengthening the relevance of both systems in local policy decisions. Cartographic results of this work are available at http://selvalacandona.ecosur.ourecosystem.com Keywords: Selva Lacandona; Critical Forest Change; Global Forest Change; Forest Monitoring; Deforestation. ID: 3624121
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    Assessing the impacts of COVID-19 pandemic on the livelihoods of forest-dependent communities: A case study of communities in Oluwa forest reserve, Nigeria
    XV World Forestry Congress, 2-6 May 2022
    2022
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    Though the COVID-19 pandemic is primarily a health crisis, it has a worldwide impact on the communities and economies. This impact has resulted in global socio-economic disruptions and diminished people’s livelihoods. Meanwhile, forests provide economical and livelihood support for many people around the world. For example, one-fifth of the global population depend on forest products for livelihoods and forty per cent of the extreme poor in rural areas live in and on forests. However, restrictions on physical activities as a measure to combat the pandemic also impacted forestry activities, which has put forest-based livelihoods at risk. Quantifying the impacts of the COVID-19 pandemic on forest-based livelihoods could help to better support and economically empowered people whose lives depend on the forests. Therefore, six communities were randomly selected in and around Oluwa forest reserve, Nigeria and a structured questionnaire was used to collect primary data from respondents using purposive sampling. The data collected was analysed using descriptive and inferential statistics to understand the impacts of the COVID-19 pandemic on the livelihoods of forest-dependent communities in Oluwa forest reserve in Nigeria. The findings from this study could be a valuable resource to rebound from the impact of the crisis. Additionally, this study could potentially strengthen the response to the pandemic and improve the resilience of forest-dependent communities. Keywords: COVID-19; communities; forest-dependents; forest reserve; Nigeria ID: 3623746
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    The 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
    2022
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    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

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