Long-Term Hydrologic Fluctuations and Dynamics of Primary Producers in a Tropical Crater Lake

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dc.contributor.authorSaulnier-Talbot, Émilie
dc.contributor.authorChapman, Lauren J.
dc.contributor.authorEfitre, Jackson
dc.contributor.authorSimpson, Kyle G.
dc.contributor.authorGregory-Eaves, Irene
dc.date.accessioned2023-01-25T19:32:39Z
dc.date.available2023-01-25T19:32:39Z
dc.date.issued2018
dc.description.abstractAquatic ecosystems in tropical regions remain understudied and their long-term dynamics poorly understood. In East Africa, a better understanding of how natural communities of primary producers in small freshwater ecosystems respond to climatic variability is needed to improve management and conservation of aquatic resources. This study explored the response of algae and bacteria communities to marked hydrological variation over the past 1,500 years in a small western Ugandan crater lake, Lake Nkuruba. We analyzed sedimentary algal and bacterial pigments to evaluate the magnitude and direction of change in the autotrophic community in response to severe climatic perturbations in the region. The lithology of the Lake Nkuruba sediment core indicated that external forcing in the form of a major drought, associated with the Medieval Climate Anomaly, caused a heavy, short-lived detrital pulse to the basin that led to a brief but substantial disruption of the lake system in the second half of the Thirteenth century. The system appears to have recovered rapidly, and then transitioned to a more productive state than the one preceding the drought. The considerable variation observed in the sedimentary pigment biomarkers is likely linked with climatically-induced changes in the water column structure of this small crater lake. Our results highlight the challenge of defining appropriate baselines or reference conditions in climatically-sensitive East African aquatic ecosystems and disentangling long-term anthropogenic impacts from the strong regional hydrological flux at the decadal to centennial scale.en_US
dc.identifier.citationSaulnier-Talbot É, Chapman LJ, Efitre J, Simpson KG and Gregory-Eaves I (2018) Long-Term Hydrologic Fluctuations and Dynamics of Primary Producers in a Tropical Crater Lake. Front. Ecol. Evol. 6:223. doi: 10.3389/fevo.2018.00223en_US
dc.identifier.other10.3389/fevo.2018.00223
dc.identifier.urihttps://nru.uncst.go.ug/handle/123456789/7246
dc.language.isoenen_US
dc.publisherFrontiers in Ecology and Evolutionen_US
dc.subjectDroughten_US
dc.subjectLake levelsen_US
dc.subjectPaleolimnologyen_US
dc.subjectSedimentary pigmentsen_US
dc.titleLong-Term Hydrologic Fluctuations and Dynamics of Primary Producers in a Tropical Crater Lakeen_US
dc.typeArticleen_US
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