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409 results on '"Thiombiano, Adjima"'

10. Modeling Height–Diameter Allometric Relationships of Dominant African Oak (Afzelia africana Sm) From West African Dry Savannas.

Author

Balima, Larba Hubert, Ouoba, Fabrice, Nacoulma, Blandine Marie Ivette, Bayen, Philippe, Ganamé, Moussa, Thiombiano, Adjima, and Źróbek-Sokolnik, Anna

Abstract

Tree height is an important ecological parameter for assessing biomass carbon accumulation rate and understanding the ontogenetic development of vascular plants. Given the lack of height measurement data, height–diameter allometric models are needed to improve carbon stock estimates. In this study, we investigated height–diameter relationships of dominant Afzelia africana Sm in West Africa. Using field measurements of 1483 trees across four forest sites and two climatic zones in Burkina Faso, we (i) compared the performance of 10 theoretical models in predicting height–diameter relationships, (ii) tested for site effects on tree height–diameter allometric relationships, and (iii) evaluated the performance of existing regional height–diameter equation in predicting tree height. We found that the asymptotic Gompertz model better described height–diameter allometric relationships of the studied species in the study area. A significant variation of the Lorey's mean height and the asymptotic maximum height was observed between forest sites, highlighting the variations of height–diameter allometric relationships with site conditions. Existing height–diameter equation developed for West Africa significantly underestimates tree height of A. africana at between 53.34% and 62.63%. The height–diameter allometric models developed in this study can be applied for carbon stock estimates in the semiarid zones of West Africa. Mixed‐species height–diameter models integrating other sites and varying climatic conditions can improve biomass estimates and contribute to a better understanding of the drivers of height–diameter relationships in savannas. [ABSTRACT FROM AUTHOR]

Published
2024
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29. Spatio-Temporal Dynamics in Land Use and Habitat Fragmentation within a Protected Area Dedicated to Tourism in a Sudanian Savanna of West Africa

Author

Dimobe Kangbéni, Goetze Dethardt, Ouédraogo Amadé, Forkuor Gerald, Wala Kpérkouma, Porembski Stefan, and Thiombiano Adjima

Subjects
biodiversity conservation, connectivity, corridors, fragmentation, landscape metrics, patch, Ecology, QH540-549.5
Abstract

Nazinga Game Ranch (NGR) is a reserve in Burkina Faso involving local communities for securing biodiversity through sustainable management. Yet, its ecosystems are threatened by increasing number of elephants and illegal human activities. Renowned as a model of wildlife participatory management, NGR has mainly been studied for its animal wildlife only. The aim of this study was to uncover ecological effects of recent land management on savanna habitats including tourism, and to conclude on more sustainable options, land use/land cover (LULC) changes and vegetation dynamics in NGR were analyzed. This was accomplished with multi-temporal change detection using Landsat images of 1984, 2002 and 2013 to map seven representative LULC classification categories, and quantitative indices of landscape metrics. The results showed that the LULC dynamics in NGR from 1984 to 2013 was mainly characterized by an expansion of gallery forest, tree savanna and agricultural area and a reduction of shrub savanna, woodland and bare soils. From 2002 to 2013, fragmentation in all land cover types increased at the landscape level, whereas at the class level, it decreased for woodland. Our findings provided evidence of habitat degradation in NGR, due to extensive agriculture, tourism and growing of elephants’ population. According to the original management goals and the purposes of the reserve, both fauna and tourism are to be maintained and sustained in a sustainable way. Adaptation of land use and targeted wildlife management are the main requirements for avoiding further degradation of vegetation and thus of the existence basis of local inhabitants, animals and tourism.

Published
2017
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38. Spatial and Temporal Dynamics of the Vegetation of Comoé-Léraba Reserve and its Surrounding Lands (Burkina Faso, West Africa)

Author

Gnoumou Assan, Rusu Eugen, Basile Adouabou, and Thiombiano Adjima

Subjects
remote sensing, diachronic, protected area, management, plant community, Environmental sciences, GE1-350
Abstract

In Burkina Faso, vegetation dynamic has been more influenced by human activities. Actually, the interest is focus on protected areas, which are more green areas and the last habitat for biodiversity. Conservation and restoration require a thorough understanding of the dynamic of each protected area and its surrounding zones. This study aim to analyze Comoé-léraba protected area vegetation spatial and temporal changed. For this study, we use satellite images taking account a period of twenty years (1990-2000-2009). Then the diachronic analysis considers globally and separately the land cover situation inside the protected zone and outside in the surrounding zone. As results, the diachronic study of Comoé-Léraba vegetation revealed significant changes. Some plant communities have remained intact; others were restored inside the protected area and against others suffered a severe deterioration. The vegetation degradation occurs, around and close to the protected area. During the twenty years 14.28 % of the natural vegetation has been loss, versus expanding fields and settlements. Beyond the obtained maps, an important data based is available. These results are important scientific stools which can support policy, conservationists and researchers for improving strategies of conservation in Comoé-Léraba zone.

Published
2016
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47. Food tree species selection for nutrition‐sensitive forest landscape restoration in Burkina Faso

Author

Vinceti, Barbara, primary, Fremout, Tobias, additional, Termote, Celine, additional, Fallas Conejo, Diego, additional, Thomas, Evert, additional, Lachat, Carl, additional, Toe, Laeticia Celine, additional, Thiombiano, Adjima, additional, Zerbo, Issouf, additional, Lompo, Djingdia, additional, Sanou, Lassina, additional, Parkouda, Charles, additional, Hien, Alain, additional, Ouédraogo, Oumarou, additional, and Ouoba, Hermann, additional

Published
2022
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