Cartographie des changements de la couverture végétale dans les aires protégées du Ferlo (Nord Sénégal) : cas de la réserve de biosphère

Sylla, Diarra; Ba, Taibou; Guisse, Aliou

doi:10.4000/physio-geo.8178

Cited by 10 publications

(6 citation statements)

References 11 publications

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“…The rainfall deficit on the study areas recorded varies from 11% to 20% and the lost of vegetative activities through the vegetation index is between 4% and 8.5% [17]. These results are in agreement with the works of ( [6] [9] [11] [15] [74]) in the Ferlo region (north of Senegal).…”

Section: Analysis Of the Land Cover Dynamic In The Senegalese Great G...supporting

confidence: 87%

“…Agroforestry practices, reforestation, good management of natural resources should be taken into account in the success of the positive vegetation dynamic [79]. According to [11] [12], the conversion with improvement of vegetation cover has affected 4000 ha in the Tessekere area. The regressing of bare soil surface areas was also due to the implementation of the Senegalese-German GTZ project since 1986.…”

Section: Analysis Of the Land Cover Dynamic In The Senegalese Great G...mentioning

confidence: 99%

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Estimation of the Carbon Sequestration Dynamics of Senegal’s Great Green Wall Based on Land Cover over the Past Three Decades

Gore,

Aman,

Kouadio

et al. 2023

JEP

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The severe drought observed in the Sahel during 1970s, 1980s and 1990s has deeply affected the population as well as the economies and the eco-systems of this climatic area. The GGW Initiative spearheaded by Africa Union in 2007 proposed to combat the land degradation and desertification by planting a wall of trees stretching from Dakar to Djibouti. A reforestation was then conducted in the Senegal's GGW since 2006 as part as other areas in the Sahel. This paper aims to evaluate the carbon sequestration dynamics in the sites of the Senegal's GGW over the last three decades. The method consists firstly of analyzing the evolution of land cover and land use dynamics based on ESA-CCI LC satellite data. There is an improvement of the surface areas of tree and shrub savanna of 11.40% (Tessekere), 8.25% (Syer) and 2.70% (Loughere-Thioly). The regreening of the different localities and a positive dynamic observed is explained by the return to normal rainfall and to reforestation actions, agroforestry practices, better management of natural resources undertaken. However, some non-reforested sites showed an opposite trend despite of the normal rainfall. Secondly, the results on land mapping are used as a proxy for the assessment of carbon stocks. The dynamic observed in vegetation cover since the beginning of the reforestation made it possible to sequester 5.8 million tons of carbon representing respectively 2.31% of African GGW. This gain in stored carbon is equivalent to 21.2 million tons of CO 2 captured in the atmosphere. Through this study, it appears that carbon storage becomes significant 8 to 10 years after the start of reforestation. An urbanization without respect for the environmental factors could be a danger for the climate (case of Ballou).

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Section: Analysis Of the Land Cover Dynamic In The Senegalese Great G...supporting

confidence: 87%

Section: Analysis Of the Land Cover Dynamic In The Senegalese Great G...mentioning

confidence: 99%

Estimation of the Carbon Sequestration Dynamics of Senegal’s Great Green Wall Based on Land Cover over the Past Three Decades

Gore,

Aman,

Kouadio

et al. 2023

JEP

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“…In this way, this paper is also an analysis based on ten years of research and immersion in the Senegalese Ferlo region, the area where the GGW is being implemented in Senegal. Our previous research in the Ferlo has focused on the ecological impact of the GGW initiative (e.g., Niang et al 2014, Sagna et al 2014, Sylla et al 2019a, Niang and Ndiaye 2021 as well as the social perceptions related to its implementation in the area (e.g., Ka 2016 or the "lifeworlds" Wane 2018, Macia et al 2022) of the Ferlo populations (e.g., Duboz et al 2021. Data were collected every year, with field work visits ranging from a few weeks to a few months.…”

Section: Analytical Approachmentioning

confidence: 99%

The Great Green Wall in Senegal: questioning the idea of acceleration through the conflicting temporalities of politics and nature among the Sahelian populations

Macia¹,

Allouche²,

Sagna³

et al. 2023

E&S

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In January 2021, the Great Green Wall Accelerator was announced at the third One Planet Summit in Paris. Based on the notion of acceleration developed by Harmut Rosa and using the idea of conflicting temporalities in the study of social-ecological systems, this article analyzes how the political will to accelerate the Great Green Wall reveals power dynamics between Western and Sahelian countries. We put in tension this acceleration of the Great Green Wall with (1) temporalities with respect to nature and reforestation, and (2) temporalities of life among the Sahelian populations. Whereas our contribution is mostly theoretical, building on Hartmut Rosa's work, we illustrate our approach in terms of political ecology and anthropology based on an empirical case study of the Ferlo region in Senegal, a key region with respect to the Great Green Wall initiative. Our analysis shows that by controlling the temporality of the Great Green Wall program through this Accelerator, Western powers dominate the Sahelian states, making the Accelerator part of a neo-colonial approach. Moreover, the desire to accelerate the Great Green Wall with a massive investment in a short span of time corresponds to the perception of a nature made available, incompatible with the time of ecological restoration. Finally, the acceleration advocated by Western economic liberalism seems to be coming up against resistance of local populations rooted in an identity that values community solidarity, the stability of social structures, and closeness between humans, their herds, and nature.

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“…Regarding the results of Table 5 and Table 6, According to [42], the spontaneous vegetation has undergone a strong regression in the Ferlo (Tessekere) region. [43] noted that the protected areas remained stable but there was a regression of the wooded and tree savannah areas. In the Ferlo region, the wooded and tree savannahs have respectively lost 306,305 and 160,576 ha for the benefits of shrub and wooded savannahs.…”

Section: Analysis Of the Vegetation Cover Dynamic In The Senegalese G...mentioning

confidence: 99%

Recent Vegetation Cover Dynamics and Climatic Parameters Evolution Study in the Great Green Wall of Senegal

Gore¹,

Aman²,

Kouadio³

et al. 2023

JEP

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The drought recorded in 1970s and 1980s, particularly in the Sahara and Sahel region has greatly affected the population as well as the economies and the eco-systems of this area. In 2007, the African Union launched a Pan-African program, the Great Green Wall for the Sahara, the Sahel Initiative (GGWSSI) to reverse land degradation and desertification by planting a wall of trees stretching from Dakar to Djibouti. The objective is to improve food security, and support local people to adapt to climate change. This paper aims to evaluate the impacts of the reforestation program in Senegal, fifteen years after it was launched. This study uses a time series of satellite-derived vegetation cover and climatic parameters data to analyze the sustainability of these interventions. Change detection approaches were applied to identify and characterize the drives of the eventual changes. A comparative analysis of reforestation on climatic parameters was explored through the temporal analysis of the vegetation index over the periods 2000-2008 and 2009-2020. An increase in vegetation activity was noted through the NDVI at the interannual (+2% to +8%) and seasonal (+1.5% to 7% for the wet season and 1% to 4% for the dry season) scale and a positive and significant evolution is noted on the trace of the GGW. Also, the period 2009-2020 recorded an increase in rainfall of 2% to 8% of the average value 2000-2020 and 4% to 8% of the rainy season. Soil moisture is the climatic parameter that has increased the most, with an increase of 25% to 54% of the 2000-2020 average, i.e. between 20 mm and 70 mm more.This study shows a significant improvement in the relationship between NDVI and climate parameters after the different reforestation actions of the GGW.

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Cartographie des changements de la couverture végétale dans les aires protégées du Ferlo (Nord Sénégal) : cas de la réserve de biosphère

Cited by 10 publications

References 11 publications

Estimation of the Carbon Sequestration Dynamics of Senegal’s Great Green Wall Based on Land Cover over the Past Three Decades

Estimation of the Carbon Sequestration Dynamics of Senegal’s Great Green Wall Based on Land Cover over the Past Three Decades

The Great Green Wall in Senegal: questioning the idea of acceleration through the conflicting temporalities of politics and nature among the Sahelian populations

Recent Vegetation Cover Dynamics and Climatic Parameters Evolution Study in the Great Green Wall of Senegal

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