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ArticleAnalysis of the evolution of deforestation in the State of Acre, in the Acre riverbasin, in buffer and permanent protected areas, from 1997 to 2017
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The goal of this article is to quantify the area deforested up to 2017 and the evolution of deforestation over the last 20 years (1997-2017) in the state of Acre, with a closer look atthe categories oftheAcre River basin, alluvial forests buffer and legally protected riparianforests (APP) along the Acre River as well as the territorial categories of public areas and private or unincorporated areas. The Acre River Basin has great socioeconomic and environmentalrelevance for the state of Acre, concentrating 66.6% of the state's total population. It is connected by road with the Pacific, and contains 49 family farm settlement projects and has 36% of its area in protected areas. The results of the comparisons between the percentages of deforested areas and the evolution of deforestation in these categories shows that the APP and buffer of alluvial forests had the highest percentage of deforestedareas, with 48% and 45%, respectively. The evolution of deforestation in these areas nearthe Acre River also shows that it acted as a vector of deforestation, with private or unincorporated areas as the main drivers. Smallholder farmers in settlement projects had a deforestation pattern that increased with distance from the river, while the traditional populations of the Chico Mendes Extractive Reserve and the indigenous populations of the Acre River Headland Indigenous Land had a pattern of greater deforestation closest to the river. Keywords: Amazon, Public and Private Areas, Riparian Forests, Vector of Deforstatiton. ID: 3622253 -
DocumentIsolation of DNA from preserved woods for identification of wood species through genetic analysis regardless of the age of wood production
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Species identification of wood provides important information for archaeology, restoration of cultural assets, preventing illegal logging, and more. Wood species are usually identified based on their anatomical features with the use of a microscope. However, this method may not be able to distinguish between anatomically similar species or subspecies. To overcome this problem, wood species need to be identified at the molecular level using DNA sequencing. However, unlike living plant cells, wood is difficult to pulverize using a mortar, and DNA extraction from dried wood is challenging. To solve these problems, we propose a pretreatment method in which wood is pulverized using 60-grit sandpaper and hydrated with water for 2 days. Using this method, we were able to stably amplify the rpoB gene from the extracted DNA of Pinus rigida. In addition, sequence analysis of the rpoB gene revealed six single nucleotide polymorphisms (SNPs), which classified the rpoB sequences in the genus Pinus into five groups. Our data indicate that although these SNPs were not suitable for species identification, they can potentially be used to determine the origin of different wood subspecies or individual samples of wood. Keywords: Monitoring and data collection, Research ID: 3616978 -
DocumentCharacteristics of sprouts occurrence by cutting to lower the stump height after harvesting the oak forest on the slope
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.This study was conducted to suggest an improved cutting to lower the stump height after harvesting that can induce the occurrence of high-quality root sprouts considering the locational characteristics of oak forests distributed mainly on slope. The study site was established in where the location environment and the stump diameter distribution were similar. The stumps were cut (control area) low horizontally based on the top of the slope, and cut (treatment area) parallel to the slope and close to the ground. The average number of occurred sprouts per stump was eleven, and there was no difference between control and treatment. The amount of stump lateral sprouts was decreased by 38% in the treatment (4.3 sprouts/stump) compared to the control (6.9 sprouts/stump). The occurrence of root sprouts (control: 3.8 sprouts/stump, treatment: 6.5 sprouts/stump) increased by 171%. 79.5% of the control lateral sprouts occurred in the lower slope direction where the stump height was relatively high. It was analyzed that lowing the overall stump height was a factor in reducing the occurrence of lateral sprouts. In order to promote the occurrence of high-quality root sprouts, an improved stump cutting, parallel to the slope and close to the ground, would be advantageous. Keywords: Sustainable forest management ID: 3613395
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