Ecological health effects of rural livelihood and poverty reduction strategies in the Lake Bosomtwe basin of Ghana

Abstract

Despite the growing recognition that poverty and environmental degradation remain a threat to achieving sustainable development goals, poverty–environment relationship is rarely explored. Crucial is the changing geography of the Lake Bosomtwe basin of Ghana. In this paper we examine how intensive and extensive fishing and farming in the name of livelihood sustainability, poverty reduction and human well-being undermine ecological health within the lake basin by subjecting data collected from 250 respondents to factor analysis. From a geo-referenced and processed classification of remotely sensed and GIS images over three periods using the maximum likelihood classifier algorithm, the results showed that, built up areas within the lake basin increased from 543.64 ha in 1986 to 7682.97 ha in 2008. Dense forest and rangeland decreased from 8698.95 and 22,660.88 ha over the same period to 1416.33 and 8577.99 ha in 2008 respectively. Other indicators such as water levels and fish stock also saw drastic reduction. The results further showed that major changes in the ecological landscape of the basin over the years are the outcomes of both direct and indirect drivers such as slash and burn agriculture, unregulated development of tourism facilities, overfishing, use of illegal fishing gear, poverty, annual overturn, climate change, market and institutional failures. Hence, a paradigm shift from the traditional site level forest restoration efforts to a landscape level, and a “conservation first principle” as a top priority in planning for the future, as well as focus on non-farm activities to reduce pressure on the natural capital are required.