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ArticleEffects of land use and land use change on soil properties in northeast rainforest landscapes of Madagascar
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Soil is a major natural resource acting as a key interface between climate and biogeochemical systems. Tavy system or slash-and-burn agriculture influences soil quality and is responsible for releases of carbon stored in the soil. This study aims to evaluate soil properties in each land use and to determine the impact of land use change on these soil properties. The study area was located in an area in the rainforest of northeastern of Madagascar. Soil samples were collected on 135 study sites composed of nine land use types including natural forest, three cropland stages, tree fallow, mixed fallow, grassland and two cash crop plantations (vanilla and coffee). Mid-Infrared Spectroscopy (MIRS) was used to estimate organic carbon (C org), total nitrogen (N tot), cation exchange capacity (CEC), soil texture and pH KCl, while available phosphorus (P Olsen), soil bulk density (BD) and soil carbon stock (SOC) for 0-30 cm and 0-100 cm were estimated with conventional methods. At plot scale and at 0-30 cm, soil in the study area relevant highly variability. Statistical analysis shows that land use change in tavy system contributes significantly to this variability with a p-value <0.001 for P Olsen, C org and N tot, p-value < 0.01 for pH KCl and p-value < 0.05 for CEC and BD. Soil nutrients (P Olsen, C org and N tot) decrease during cultivation period and increase during fallow periods. The CEC and pH KCl were stable but decline rapidly at the grassland stage. SOC for both depths declines over two periods: after the first cropland and the third cycle of cropland after deforestation. The presence of tree vegetation in cash crops (vanilla and coffee) maintains a mean value of soil properties. The results presented in this study will be useful for forest landscape management and will allow the integration of the soil pool in the accounting of the SOC flow in the implementation of REDD+. Keywords: Agriculture, Biodiversity conservation, Climate change, Deforestation and forest degradation, Landscape management ID: 3483094 -
Book (series)Sustainable bioenergy potential in Zambia
An integrated bioenergy food security assessment
2020Also available in:
No results found.Zambia is richly endowed with a wide range of biomass sources including woodlands, forests, agricultural residues and livestock waste. Biomass energy contributes supplies over 70 percent of the country’s energy needs. Due to the current extraction and consumption methods, the use of biomass energy has been linked with detrimental environmental effects such as deforestation and forest degradation as well as climate change, due to the loss of carbon sinks. Inefficient utilisation of biomass contributes significantly to deforestation which is estimated at between 79 000 – 150 000 ha per year, and negatively affects the health and income of rural households that depend on forest products for their livelihoods. Sustainable bioenergy strategies and alternative bioenergy solutions need to be defined and integrated into current efforts of the country to increase stable and sustainable access to energy. This report assesses the country context and defines which bioenergy options can be viable considering a number of solutions for electricity production, cooking fuels and transport fuels at the provincial and district level. Possible options originating from crop residues, livestock residues and forest plantation harvesting residues are identified, having netted out agriculture and forestry needs. The assessment now needs to be followed by local verification and investment to deploy an initial set of bioenergy projects and test the findings on the ground. -
ArticleCan carbon be sequestered in Red Panda (Ailurus fulgens Cuvier 1825) habitats in Nepal?
XV World Forestry Congress, 2-6 May 2022
2022Also available in:
No results found.Forest carbon stock can provide alternative opportunity for the conservation of forests and biodiversity. Previous studies on red panda habitats in Nepal barely provide accurate information of carbon stock from those habitats which is critical for devising long term conservation plan for this species. Thus, the present study aims to document and describe carbon sequestration in red panda habitat to create the first-ever broad- scale scientific basis for the promotion of red panda conservation efforts with a limelight on carbon stock. Extensive field surveys conducted to record red panda presence only data in red panda range rural municipalities of Jajarkot district. A total of 261 red panda presence point were recorded and a quadrate of 10 m*10 m were laid to record the Diameter at Breast height (DBH) and height of trees. The study assessed the above ground and below ground tree biomass carbon stock. The above ground tree biomass was found 1952.49±1279.34 ton/ha whereas below ground tree biomass was 390.49±255.86 ton/ha. Likewise, above ground carbon stock was found 917.67±601.29 ton/ha and below ground was 183.53±120.25 ton/ha. Total carbon stock of the forest was 1101.21±721.55 ton/ha and CO2 equivalent is 4037.75±2645.68 ton/ha. This study gives way to link forest carbon stock and biodiversity conservation. Assessing the relationship between carbon stocks and biodiversity is important in understanding the trade-off between two major benefits of forest ecosystems. The study could be used as a background to suggest alternative strategies to conserve the red panda habitats, taking into account the social and economic concerns and climate change benefits from forests in low-income highland communities. Keywords: Biodiversity conservation, Climate change, Governance, Deforestation and forest degradation. ID: 3623924
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