Wetland Dynamics, Trends and Environmental Implications: Comparative Study in Bamenda II and III Municipalities, North West Region, Cameroon

Yıl 2022, Sayı: 45, 1 - 14, 30.12.2022

Mbanga Lawrence Akei Dingha Chrispo Babilia

https://doi.org/10.26650/JGEOG2022-980928

Öz

Despite the loss of wetlands at varying degrees around the world, there is insufficient empirical information to elucidate the trajectories in wetland dynamics, especially in developing countries. As such, this study examines the trends in wetlands dynamics in the Bamenda II and III municipalities of Cameroon, analyzes the environmental implications, and investigates some adaptation and mitigation strategies to wetlands mutation seen in these areas. Data was collected from institutions and online sources, and supported by interviews, field surveys, and the administration of a questionnaire to 164 respondents. Satellite images were downloaded from USGS for 1980, 2000 and 2020. These were corrected, and processed in ArcGIS 10.3 using the interactive supervised classification tool and converted from raster to vector, permitting the production of LULC maps and automatic calculation of changes in wetland areas. Frequency and descriptive analyses was done in SPSS version 20 and Microsoft Excel 2016. The results indicate that wetlands decreased from 33.91 km2 to 28.58 km2 in Bamenda II and from 13.58 km2 to 9.09 km2 in Bamenda III from 1980 to 2020. This retreat of wetlands is associated with biodiversity loss, pollution and flooding, which are the basis for engineering and non-engineering adaptation measures.

Anahtar Kelimeler

Wetlands dynamics, degradation, Bamenda II and III municipalities

Sulak Alan Dinamikleri, Eğilimleri ve Çevresel Etkileri: Kamerun’da Bamenda II ve III Belediyeleri için Karşılaştırmalı Bir Çalışma

Öz

Sulak alanlar dünya çapında değişen oranlarda kaybedilmektedir. Ancak özellikle gelişmekte olan ülkelerde ise sulak alan dinamiklerinin durumunu açıklayan yetersiz ampirik bilgiler bulunmaktadır. Bu nedenle, bu çalışma Bamenda II ve III belediyelerinde sulak alan dinamiklerindeki eğilimi incelemiş, çevresel etkileri analiz etmiş ve sulak alan mutasyonuna uyum ve azaltma stratejilerini araştırmıştır. Veriler kurumlardan ve çevrimiçi kaynaklardan elde edilmiş, görüşmeler, saha araştırması ve 164 anketin yönetimi ile desteklenmiştir. Uydu görüntüleri 1980, 2000 ve 2020 için USGS’den indirildi. Bunlar düzeltildi ve etkileşimli denetimli sınıflandırma kullanılarak ArcGIS 10.3’te işlenmiş ve LULC haritalarının üretilmesine ve sulak alanlardaki değişikliklerin otomatik hesaplanmasına izin vermek için rasterden vektöre dönüştürülmüştür. Frekans ve tanımlayıcı analizler SPSS sürüm 20 ve Microsoft excel 2016’da yapılmıştır. Sonuçlar, 1980’den 2020’ye Sulak Alanların Bamenda II’de 33.91 km2 ’den 28.58 km2 ’ye ve Bamenda III’te 13.58 km2 ’den 9.09 km2 ’ye düştüğünü göstermektedir. Bu dinamikler, mühendislik ve mühendislik dışı uyum önlemlerinin temeli olan biyolojik çeşitlilik kaybı, kirlilik ve sel ile ilişkilendirilmiştir. Sulak alan dinamikleri aynı döngüyü takip etse de, sulak alan kaybı eğrisini kırmak için geliştirilen stratejiler bu değişimi farklı oranlarda yapabilmektedirler.

Anahtar Kelimeler

Sulak alan dinamikleri, bozulma, Bamenda II ve III belediyeleri

Kaynakça

• Asangwe K.C. (2009). Monitoring wetlands deterioration in the Cameroon coastal lowlands: Implications for management. Procedia Earth and Planetary Science, 1010-1015. google scholar
• Ataol, M., & Onmuş, O. (2021). Wetland loss in Turkey over a hundred years: Implications for conservation and management. Ecosystem Health and Sustainability, 7(1), 1930587. https://doi.org/10.1080/2 0964129.2021.1930587 google scholar
• Australian government (2019). Wetlands and climate change. Department of the Environment and Energy. 2 P. google scholar
• Enwere C.L., (2015). Impacts of wetland degradation in Niger Delta Nigeria and its significance in flood control. International Journal of Environment, 4(3), 177-184. google scholar
• Erqi X. and Yimeng C., (2019). Modeling intersecting process of wetland shrinkage and urban expansion by a time varying methodology. Sustainability, 11(4953), 1-24. google scholar
• Fengqin Y., (2020). Large-scale marsh loss reconstructed from satellite data in the small Sanjiang plain since 1965: process, pattern and driving force. Sensors, 20(14), 1-17. google scholar
• Fombe, L. F., & Acha, M. E. (2020). Land Use Dynamics and Variations in Sprawl across Municipalities in the Bamenda Urban-scape from 1996-2018. Journal of Sustainable Development, 13(4), 224. Https://doi.org/10.5539/jsd.v13n4p224 google scholar
• Islam M.S., Rahman M.R., Shahabuddin A.K.M. and Ahmed R., (2010). Changes in wetlands in Dakar city: Trends and physico-environmental consequences. Life Earth Sciences, 5, 37-42. google scholar
• Kevin L.E., (2009). Wetlands and global climate change: the role of wetland restoration in a changing world. Wetland Ecology, 71-84. google scholar
• Kimengsi J. N., Balgah S. N. and Achia S. N. (2017). Peri-urban 'land use dynamics and development implication in Bamenda III municipality of Cameroon. Sustainability in Environment, 2(3), 273-288. google scholar
• Lee S.Y., Dunn R.J.K., Young R.A., Connocly R.M., Dale P.E.R., Dehayr R., Lemckert C.J., Mckinnon S., Powell B., Teasdalle P.R. and Welsh D.T., (2006). Impact of urbanization on coastal wetland structure and function. Austral Ecology, 149-163. google scholar
• Lucia, M.-B., Lyons, M., Phinn, S., & Roelfsema, C. (2019). Trends in Remote Sensing Accuracy Assessment Approaches in the Context of Natural Resources. Remote Sensing, 11(19), 2305. https://doi. org/10.3390/rs11192305 google scholar
• Mrema E. M., (2020). Statement by Elizabeth Maruma Mrema (Acting Executive Secretary, Convention on Biological Diversity), on the occasion of World Wetlands Day. “Wetlands and Biodiversity”. United Nations decade on biodiversity, Secretariat of CBD, United Nations Environment Program, 413 Saint-Jacques Street, Suite 800, Montreal, QC, H2Y 1N9, Canada. 1 P. google scholar
• Nyambod E. M., (2010). Environmental consequences of rapid urbanisation: bamenda city, Cameroon. Journal of Environmental Protection, 1, 15-23. google scholar
• Oben M.L., Sama C. and Agbor E.M.T., (2018). Assessing the impact of solid organic waste in Mezam river in the Bamenda municipality. International Journal of Advances in Scientific Research and Engineering, 4(11), 307-313. google scholar
• Pengfei Y., Xiaoying H. and Yifei C., (2018). Analysis on ecological protection of urban wetlands. Natural Resources conservation and Research. 1-7. google scholar
• Pieter T.J.J., Jason T.H., Valerie J.M., Andrew R.B. and Katherine L.D.R., (2013). Urbanization and wetland communities: Applying metacommunity theory to understand the local and landscape effects. Journal of Applied Ecology, 50, 34-42. google scholar
• Saha F. and Tchindjang M., (2017). Rainfall variability and floods occurrence in the city of Bamenda (Northwest of Cameroon). Revue Scientifique et Technique Forêt et Environnement du Bassin du Congo, 9, 58-68. google scholar
• Scaramelli, C. (2018). “The wetland is disappearing”: conservation and care on turkey’s kizilirmak delta. International Journal of Middle East Studies, 50(3), 405-425. https://doi.org/10.1017/S0020743818000788 google scholar
• Siyavuş, A. E. (2021). Changes in Land Use and Land Cover of Düzce Province (1990-2018). Journal of Geography, 0(42). https://doi. org/10.26650/JGEOG2021-816407 google scholar
• Tangao H., Jiahong L., Gang Z., Dengrong Z., Kangning H., (2019). Evaluation of historical and future wetland degradation using remote sensing imagery and land use modeling. Land Degrad Dev, 31, 65-80. google scholar
• Tickner D., Jeffrey J. O., Robin A., Mike A., Angela H. A., Stuart E. B., Steven J. C., James D., Will D., Gavin E., google scholar
• Ian H., Kathy H., Tim J., David L., Abigail J. L., Philip L., Michael E. M., Dean M., Julian D. O., Steve J. O, James R., Rebecca E. T., Michele T., Klement T., Mark W. and Lucy Y., (2020). Bending the Curve of Global Freshwater Biodiversity Loss: An Emergency Recovery Plan. BioSciences, 70(4), 330-342. google scholar
• United Nations Development Program, (2012). Sustainable wetland management in the face of climate risks in Niger. The case of la mare de Tabalak. Bureau for Crisis Prevention and Recovery (BCPR), New York, NY: UNDP BCPR. 57 P. google scholar
• Wolfgang J.J., (2002). Long-term environmental trends and the future of tropical wetlands. Environmental Conservation, 29(4), 414-135. google scholar
• Zorrilla P.M., Palomo I., Gomez E.B., Martin B.L., Lomas P.L. and Montes C., (2013). Effects of land use change on wetland ecosystem services: a case study in the Donana marshes (SW Spain). Landscape and urban Planning, 122, 160-174. google scholar