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Another step forwards in fighting desertification: for a regional community programme in the circum-Sahara (AMU, ECOWAS/CILSS, CEN-SAD, OSS)

Introductory Note No. 2









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    Article
    Desertification combating and ecological restoration of selected acacia species from sub-sahara, savanna regions
    XV World Forestry Congress, 2-6 May 2022
    2022
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    The Acacia species are widely distributed in the Sub-Sahara, Savanna regions and are of significant importance in terms of ecological remediation, afforestation programming, and economic value. Seed dormancy is common in Acacia species, and it creates difficulties in seed testing and planting. The initial aim of the current study was to assess the influence of a different temperature and different levels of water potential for germination based on the hydrothermal time models that had been successfully prophesying germination demand in several threat categories. Seeds of four Acacia species were treated at different temperature (15°C, 20°C, 25°C, 30°C and 35°C) and different levels of osmotic stress (0, -.4, -0.8, and -1.2 MPa). The results revealed that the degree of dormancy variation among the species, they were 81% for A. nilotica, 74% for A. seyal, 15% for A. mellifera, and 5% for A. senegal. Whereas, the optimal temperatures responded is 25°C for A. seyal, and A. senegal, A. nilotica, and 20°C for A. mellifera. Therefore, there are negative correlations appeared within germination percentages and water potential, . seyal, and A. senegal was displayed a drought-tolerant significantly lower levels of water stress. In contrast, A. nilotica and A. mellifera indicated less drought-tolerant of promoting water stress. Keywords: Acacia, Temperature, Water Stress, Hydrothermal Time, Germination, Drought, Restoration ID: 3618104
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    Book (series)
    Evaluation of the project "Action Against Desertification in support of the implementation of the Great Green Wall for the Sahara and the Sahel Initiative, the United Nations to Combat Desertification and Drought action plans in Fiji and Haiti, and South–South cooperation in the African, Caribbean and Pacific Group of States"
    Project code: GCP/INT/157/EC
    2022
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    The “Action Against Desertification in support of the implementation of the Great Green Wall for the Sahara and the Sahel Initiative, the UNCCD action plans in Fiji and Haiti, and South–South Cooperation in the African, Caribbean and Pacific Group of States” project (AAD) worked with eight countries in Africa, the Caribbean and Asia to tackle the detrimental social, economic and environmental impacts of land degradation and desertification (2014 to 2020). It was implemented by the Food and Agriculture Organization of the United Nations (FAO) and partners, with majority of funding from the European Union and co-funding from diverse partners. The project contributed to improving the conditions and productivity of agrosilvipastoral landscapes and the capacity to plan land restoration and manage forest and land resources. Livelihood improvements and concrete positive incidence on household income, food security, crops and milk production, and community interactions. It increased awareness and support policy makers developing intervention strategies that address D/LDD. The large-scale, heavy machinery-based technical intervention logic was found appropriate to address desertification/land degradation and drought (D/LDD) in specific conditions and countries. The geospatial study estimated the contribution of Action Against Desertification (AAD) to carbon sequestration to be between 384 000 and 1.27 million tonnes of carbon sequestered. The evaluation recommendations include further investments in training; building awareness and addressing climate change and land degradation; increasing political and policy coherence; guaranteeing sustainability and buy-in from beneficiaries; building in sustainable financing mechanisms at all stakeholder levels; increasing opportunities; and developing non-timber forest product (NTFP) value chains to create and develop viable markets for the products.
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