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ArticleReforestation on ex mining reclamation area
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Ex-mining land is categorized as land with a high level of degradation. The loss of biodiversity, low soil fertility, loss several layer of soil horizon, very unbalance texture, and even contamination can occur due to mining activities. Reforestation of mining land has been carried out with the approaches of improving the physical properties of the soil, selecting plant types, and improving soil biology in ex-gold mining land in Bogor. The addition of compost significantly increased organic matter content, C/N ratio, macro nutrients (N,P,K) content and improving soil texture. The application of Mycorrhiza and rhizobium significantly increase the growth of forest plant such as trembesi (Samanea saman), gmelina (Anthocepalus cadamba) and ganitri (Elaeocarpus angustifolus), in ex-gold mining areas. The application of those significantly improved vegetation diversity on ex-gold mining land including more than 8 types of understory plants and more than 5 plants were from the trees group. This show that reforestation of ex-mining land is feasible if it is carried out with a comprehensive approach. Keyword: Reforestation, Arbuscular Mycorrhiza Fungi, Biodiversity, Compost, Tailing ID: 3486319 -
ArticleTree size diversity and carbon stock of Tectona grandis (Linn f.) standsin hilltop and valley-bottom of Omo forest reserve, Nigeria
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Competition for growth resources contributes to size hierarchy in tree populations. Competition hierarchy of trees is dependent on rate of growth and stages of stand development. However, competition hierarchy in tree population may not cause size symmetry in some stress habitats. Size structure and development of even- aged stand can be influenced by abiotic factors. The study investigated tree size structure and carbon stock of Tectona grandis stands in Valley-Bottom and Hilltop of Omo Forest Reserve. Ten-years-old Teak plantation was delineated into Hilltop and Valley-Bottom stands base on topography. Five (30m x 30m) sample plots were systematically demarcated in each of Hilltop and Valley-Bottom stands. Tree stems were enumerated and densities of both stands were estimated. Total height and diameter-at-breast height were measured using Spiegel Relaskop and Girth tape, respectively, and stem carbon was estimated. Inequality and diversity of stem size of both stands were evaluated. Data collected were analyzed using descriptive, correlation, regression analysis and t-test at α0.05. Stem density of Hilltop (1431.0 stems/ha) was higher than Valley-Bottom stands (1248.0 stems/ha). Mean stem diameter of Valley-Bottom were not significantly different from Hilltop stands. Coefficient of determination (R2 ) of Height-Diameter allometry for Valley-Bottom (0.59) was higher than Hilltop stands (0.45). Diameter distribution of Valley-Bottom and Hilltop expressed bimodality and unimodality, respectively. Inequality was higher in Hilltop than Valley-Bottom for diameter. The stems of Hilltop and Valley-Bottom stands contributed 49.68% and 50.32% of total stem carbon, respectively. Elevation affected the stem size hierarchy and carbon stock distribution of Valley-Bottom and Hilltop habitats. Stems of Valley-Bottom stand could be a good option for carbon sequestration in Omo Forest Reserve. Keywords: Competition hierarchy; Size symmetry; Elevation gradient; Tree height; Tree diameter ID: 3623266 -
ArticleThe social engagement in the forest landscape restoration (FLR): An experience with restoration opportunity assessment methodology in Minas Gerais, Brazil
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.The Northern Gualaxo watershed in the Rio Doce basin in Minas Gerais State, Brazil, directly affected by the rupture of the mining tailings dam in 2015, among the actions to mitigation and compensation to reduce the impacts the Renova Foundation has applied the Restoration Opportunity Assessment Methodology (ROAM). ROAM is a toolbox that aims to support forest landscape restoration (FLR) planning process. The approach includes the engagement of local actors through discussions about motivation factors to join FLR efforts and the current situation of enabling conditions in the territory. All the analysis conducted under the ROAM application process had been validated by stakeholders and though these activities the governance local has strengthened. The results identified that income generation, water quality improvement and engagement were the three main motivational factors. From that, a spatial analysis identified the estimated areas that could support each of this factors that could support the establishment of the priorities in a land use planning process in the region. Also, based on the collective discussions the main identified gaps to implement FLR activities were the products commercialization, technical assistance, social engagement, and scalability. Based on this experience, strategies for solutions are being proposed and implemented in order to provide an enable environment FLR agenda with a strong social engagement in the process. Keywords: governance, forest landscape management ID: 3624093
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