Spatio-temporal Dynamics of the Aquatic Plant Colonisation of Lake Dang in the Sudano-Guinean Zone (Adamaoua-Cameroon)

Ali Ahmed Davy *

Department of Biological Science, Faculty of Sciences, University of Maroua, Cameroon and Department of Agriculture, Livestock and By-products, National Advanced School of Engineering of Maroua, Cameroon and Department of Biological Sciences, Faculty of Sciences, University of Ngaoundere, Cameroon.

Bitom-Mamdem Lionelle

Department of Earth Sciences, Faculty of Science, University of Yaounde I, Yaounde, Cameroon.

Tchobsala

Department of Biological Science, Faculty of Sciences, University of Maroua, Cameroon.

Ibrahima Adamou

Department of Biological Sciences, Faculty of Sciences, University of Ngaoundere, Cameroon.

*Author to whom correspondence should be addressed.


Abstract

Very little information exist on lake environment in Northern Cameroon. The objective of this study is to determine the colonisation plant of Lake Dang using field and remote sensing data from LM, Landsat5, Landsat7 and Landsat8 images, over a 45-year period (1975-2020), spaced 15 years apart (1975; 1990; 2005; 2020). The method of diachronic analysis of satellite data was used and the supervised classification approach based on colour compositions and bands were chosen for class discrimination. The overall accuracies obtained ranged from 96.35 to 89.28%, followed by Kappa indices of 74.43 to 90.18% for the years 1975 and 2020 respectively. The results on the spatio-temporal dynamics of water bodies from 1975 to 2020 show an average annual rate of regression of the water surface of -1.35%/year, i.e. 0.099 km2/year, in favour of vegetation. The period from 1987 to 2002 shows a more marked evolution, with a rate of plant colonisation of 1.98%/year, i.e. 0.145 km2/year, compared to the periods from 1975 to 1990 (rate of plant colonisation of 0.85%/year, i.e. 0.062 km2/year) and 2005-2020 (1.23%/year, i.e. 0.090 km2/year). Today, 73% (5.376 km2) of the total surface area (7.365 km2) of the water body is colonised by vegetation. Moreover, bathymetry shows a maximum depth of 2.70 to 2.80 m, which is discriminating for a lake ecosystem in the Sudano-Guinean zone. Consequently, the preliminary results of this study shows that Lake Dang is marked by a strong eutrophication due to anthropic activities caused by agriculture, urbanization and non-rational deforestation which have strongly affected the occupation of the lake banks.

Keywords: Remote sensing, plant colonisation, anthropic activities, Lake dang, Adamaoua-Cameroon


How to Cite

Davy , A. A., Lionelle, B.-M., Tchobsala, & Adamou , I. (2023). Spatio-temporal Dynamics of the Aquatic Plant Colonisation of Lake Dang in the Sudano-Guinean Zone (Adamaoua-Cameroon). Journal of Geography, Environment and Earth Science International, 27(2), 7–16. https://doi.org/10.9734/jgeesi/2023/v27i2667

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References

SPANB II. République du Cameroun, Stratégie et Plan d'Action National pour la Biodiversité - Version II. 2012;81.

Ozer P, Perrin D. Water and climate change. Tendances et perspective en Afrique de l'Ouest. University of Angers Press. 2014;227-245.

Fustec E, Lefeuvre JC. Functions and values of wetlands, Dunod, Paris. 2000;426.

Maltby E, Barker TE. The Wetlands Handbook Wiley-Blackwell, Oxford. 2009;1024.

Mitsch WJ, Gosselink JG. Wetlands 4th ed, Wiley, Oxford. 2007;600.

Murdoch PS, Baron JS, et Miller TL. Potential effects of climate change on surface-water quality in North America. Journal of the American Water Resources Association. 2000;36(2):347-366.

Schindler DW. Light, temperature and oxygen regimes of selected lakes in the experimental lakes area (ELA), Northwestern Ontario. Resource Centre. Canadian Journal of Fishery. 1971;28: 157-170.

Acreman M, Blake J, Booker D, Harding R, Reynard N, Mountford J, et Stratford C. A simple framework for evaluating regional wetland ecohydrological response to climate change with case studies from Great Britain. Ecohydrology. 2009;2(1): 1-17.

Turner RK. Policy failures in wetland management. In OECD (Ed), Market and Government Failures in Environmental Management. Wetlands and Forests. Paris. 1992;9-47.

Maltby E. Waterlogged wealth: Why waste the world’s wet places? Russel Press, Nottingham. 1986;200.

Acreman MC, et McCartney MP. Hydrological impacts in and around wetlands. In Maltby E. et Barker T. (Eds). The wetlands handbook, Wiley-Blackwell, Oxford. 2009;643-666.

Gopal B. Biodiversity in wetlands. In Maltby E, Barker T. (Eds), The wetlands handbook, Wiley-Blackwell, Oxford. 2009; 65-95.

Baska Toussia, Puşcaşu. Vegetable growing on the banks of Lake Dang in Ngaoundéré (North Cameroon): What are the environmental and health social issues? Analele universităţii ştefan cel mare suceava secţiunea geografie anul xix ; 2010.

Daiwe N. and Ngounou Ngatcha B. Siltation study of Lake Dang (Ngaoundéré Cameroon) and estimation of suspended solid transport. Panger. 2010;47(48):63-67.

Ali Ahmed D. Etude phytoécologique et limnologique du lac de Dang : Potentiel de séquestration du carbone des ligneux et perspectives d'aménagement (Ngaoundéré -Cameroun). Master's thesis University of Ngaoundéré. 2017;118.

Tchotsoua M. Analyse de l'évolution des types d'occupation du sol sur le plateau de Ngaoundéré (1951-2001). Annales de la FALSH de l'Université de Ngaoundéré, special issue. 2006;43-64.

Kouassi AM. Characterization of a possible change in the rainfall-flow relationship and its impacts on water resources in West Africa: Case of the N'zi (Bandama) catchment area in Côte d'Ivoire. Ph. D thesis from the University of Cocody, Côte d'Ivoire. 2007;210.

Pontius JRG. Quantification error versus location error in comparison of categorical maps. Photogrammetric Engineering and Remote Sensing. 2000;66(8):1011-1016.

Mama V, Oloukoi J. Evaluation of the accuracy of analogue processing of satellite images in the study of land cover dynamics. Remote Sensing. 2003;3(5): 429-441.

Behmel S. Introduction to limnology and watershed management. Technical Report. 2016;14-17.

Ogutu-Ohwayo R, Hecky RE, Cohen AS, et Kaufman L. Human impact on the African Great Lakes. Environmental Biology of Fishes. 1997;50(2):117- 131.

McCartney MP, et Acreman MC. Wetlands and water resources. In Wiebe K. et Gollehon Ne (Eds). Quality Assurance. Wiley-Blackwell, Oxford. 2009;344- 376.

Baska Toussia. Changes in the habitat and sanitation system in North Cameroon: The case of Ngaoundéré III. Revue De Géographie Tropicale et d'Environnement. 2013;2:7-9.

Mama D. Methodology and results of the diagnosis of eutrophication in Lake Nokoue (Benin). PHD thesis, University of Limoges, Doctoral School of Science, Technology and Health. 2010;70.

Cecchi P, Gourdin F, Kone S, Corbin D, Jackie E, Casenave A. Les petits barrages du nord de la Côte d'Ivoire: Inventaire et potentialités hydrologiques. Drought. 2009; 20(1):112-22.

Rankovic A, Pacteau C, Abbadie L. Ecosystem services and interscalar urban adaptation to climate change: An articulation essay. Revue Scientifique De l'environnement. 2012;17(2):157- 183.

Niu X, Hu Y, Lei Z, Wang H, Zhang Y, Yan H. Spatial and temporal evolution characteristics of land use/cover and Its driving factor in cambodia during 2000-2020. Land. 2022;11(9):1556.

Zhezherya VA, Zhezherya TP. Spatial and temporal changes in the concentration of nutrients in urban water body (on the example of Lake Verbne, Kyiv). Hydrobiological Journal. 2021;57(2).