Spatio-temporal Assessment of Mangrove Cover Change in Niger Delta, Nigeria


Authors : Afiesimama, S. E; Mmom, P.C; Eludoyin, O. S

Volume/Issue : Volume 6 - 2021, Issue 7 - July

Google Scholar : http://bitly.ws/9nMw

Scribd : https://bit.ly/3CgOaZw

Mangroves are one of the unique ecosystems on earth that provide both ecologic and socio-economic benefits to coastal communities. However, increase in anthropogenic activities has put pressure on the mangrove forests resulting in the decline of mangrove extent. This study assessed the extent and rate of mangrove cover change for the period 1986-2018 in Niger Delta, Nigeria. Mangrove cover extent was estimated using remotely sensed data (Landsat TM images for 1986, 2000, and 2018). Supervised classification was conducted for image classification and mapping changes using a maximum livelihood classifier approach. Changes in the extent of mangrove cover were calculated using the change detection method. An assessment of the Landsat TM images showed a 63.65% (3,206.25 km2 ) decrease in mangrove extent and an annual average mangrove loss rate of 1.99% yr -1 for the period 1986-2018. The result revealed the dynamics of mangrove cover change, and concludes that the rate of mangrove loss in Niger Delta is consistent with global trend. These findings will provide data for aiding mangrove conservation intervention policies in Niger Delta, Nigeria. The study recommends continuous monitoring and assessment of changes in the mangrove areas which will also help to identify the drivers of these changes.

Keywords : Mangrove Cover, Remotely-Sensed Data, Change Detection Method, Mangrove Conservation, Niger Delta.

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