Research

Earth system models are the only scientific tools yet developed that are capable of integrating the multitude of physical, chemical and biological processes that determine past, present and future climate. Researchers here use the Community Earth System Model (CESM) to generate depictions of environmental futures under climate change specifically to serve stakeholder needs for each of the major Great Lake watersheds.

The Intergovernmental Panel on Climate Change (2014) predicts by the end of this century ~1 4 degrees_C warming and an uncertain trend in future rainfall in the Great Lakes region of East Africa, perhaps 10% lower than present in the Malawi/Nyassa basin and 10% higher in the lake basins to the north. Radar altimetry records of lake level trends available since 1992 display decadal scale variability of 1-2 m, with an overall trend in the last decade towards lower levels in Lakes Malawi/Nyassa and Rukwa, and higher levels in the lakes to the north of Rukwa.

This paper highlights lessons from a study that was conducted along Lake Malawi from January to March 2014. The study aimed at building climate change resilience in the Malawi's fisheries sector. Collection of data was guided by the framework called Climate change impact pathways to fisheries and aquaculture systems . Several lessons on vulnerabilities, impacts, responses and measures were drawn from the study.

In the face of stagnating wild fisheries in Lake Victoria and a rapidly growing human population, aquaculture may improve food and livelihood security in Kenya, Uganda, and Tanzania. Very recently, cages for farming the introduced Nile tilapia have been popping up on the lake at a rapid rate. While cage culture could provide food and income, there are many pressing questions: What will be the physical impact of cages on the lake's limnology? Will there be adverse effects for wild populations?

The United Nations' 2030 Agenda for Sustainable Development accepts the formidable challenge of integrating historically siloed, economic, social, and environmental goals into a unified plan of action for people, planet, and prosperity. While small-scale fisheries in marine systems were given their target as part of SDG14: Life below water, at first sight the SDGs appear to ignore inland fisheries.

Lake Malawi in the Africa Great Lakes region is one of the deepest lakes in the world. The total number of fish species in Lake Malawi is estimated at approximately 15% of the global total of freshwater species and approximately 4% of the world's fishes. Particularly noteworthy are the high diversity of haplochromine cichlids. It is listed as a world heritage site due to its outstanding universal values. Lake Malawi is about 586 km long and 16-80 km wide covering 20% of Malawi's earth surface.

Lake Victoria, the largest African lake, is shared by Kenya, Uganda and Tanzania. Its fisheries are a source of livelihoods for a large population of the lake's basin through fishing, trade and associated activities. It also contributes to the economies of the three countries through fish exports. The declining trend of fish harvests and fish stock biomass, attributed mainly to increasing fishing effort and illegal fishing, threatens the sustainability of the lake's fisheries. The regional trade in immature fish backed by high-level corruption has exacerbated the decline.