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Solar irradiance and ENSO affect food security in Lake Tanganyika, a major African inland fishery.


ABSTRACT: Food security in a warming world is a grave concern for rapidly growing impoverished populations. Low-latitude inland fisheries provide protein for millions of rural poor, yet the impacts of high-frequency climate oscillations on these aquatic ecosystems are unknown. Here, we present a sub-annual-to-annual resolution paleolimnological reconstruction of upwelling, productivity, and algal composition at Lake Tanganyika, one of Africa's largest landlocked fisheries. The data reveal increases in diatom production at centennial-scale solar irradiance maxima, and interannual variability in upwelling linked to La Niña. Our study shows that interactions between global climatic controls and El Niño-Southern Oscillation teleconnections exert profound influences on the foundation of Lake Tanganyika's food web. Adapting long-term management practices to account for high-frequency changes in algal production will help safeguard inland fish resources.

SUBMITTER: McGlue MM 

PROVIDER: S-EPMC7546696 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature

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Solar irradiance and ENSO affect food security in Lake Tanganyika, a major African inland fishery.

McGlue M M MM   Ivory S J SJ   Stone J R JR   Cohen A S AS   Kamulali T M TM   Latimer J C JC   Brannon M A MA   Kimirei I A IA   Soreghan M J MJ  

Science advances 20201009 41


Food security in a warming world is a grave concern for rapidly growing impoverished populations. Low-latitude inland fisheries provide protein for millions of rural poor, yet the impacts of high-frequency climate oscillations on these aquatic ecosystems are unknown. Here, we present a sub-annual-to-annual resolution paleolimnological reconstruction of upwelling, productivity, and algal composition at Lake Tanganyika, one of Africa's largest landlocked fisheries. The data reveal increases in dia  ...[more]

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