Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12779/6138
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dc.contributor.authorCózar, A.en_us
dc.contributor.authorM., Brunoen_us
dc.contributor.authorN., Bergaminoen_us
dc.contributor.authorB., Úbedaen_us
dc.contributor.authorL., Bracchinien_us
dc.contributor.authorA. M., Dattiloen_us
dc.contributor.authorLoiselle, Steven Arthuren_us
dc.date.accessioned2021-03-30T15:59:56Z-
dc.date.available2021-03-30T15:59:56Z-
dc.date.issued2012-
dc.identifier.issn1932-6203en_US
dc.identifier.urihttp://hdl.handle.net/20.500.12779/6138-
dc.description57054en_US
dc.description.abstractThe relative bio-optical variability within Lake Victoria was analyzed through the spatio-temporal decomposition of a 1997– 2004 dataset of remotely-sensed reflectance ratios in the visible spectral range. Results show a regular seasonal pattern with a phase shift (around 2 months) between the south and north parts of the lake. Interannual trends suggested a teleconnection between the lake dynamics and El-Nin˜o phenomena. Both seasonal and interannual patterns were associated to conditions of light limitation for phytoplankton growth and basin-scale hydrodynamics on phytoplankton access to light. Phytoplankton blooms developed during the periods of lake surface warming and water column stability. The temporal shift apparent in the bio-optical seasonal cycles was related to the differential cooling of the lake surface by southeastern monsoon winds. North-south differences in the exposure to trade winds are supported by the orography of the Eastern Great Rift Valley. The result is that surface layer warming begins in the northern part of the lake while the formation of cool and dense water continues in the southern part. The resulting buoyancy field is sufficient to induce a lakewide convective circulation and the tilting of the isotherms along the north-south axis. Once surface warming spreads over the whole lake, the phytoplankton bloom dynamics are subjected to the internal seiche derived from the relaxation of thermocline tilting. In 1997–98, El-Nin˜o phenomenon weakened the monsoon wind flow which led to an increase in water column stability and a higher phytoplankton optical signal throughout the lake. This suggests that phytoplankton response to expected climate scenarios will be opposite to that proposed for nutrient-limited great lakes. The present analysis of remotely-sensed bio-optical properties in combination with environmental data provides a novel basin-scale framework for research and management strategies in Lake Victoria.en_US
dc.language.isoenen_US
dc.relationNoneen_US
dc.relation.ispartofPLOS ONEen_US
dc.titleBasin-scale Control on the Phytoplankton Biomass in Lake Victoria, Africaen_US
dc.typeArticleen_US
dc.identifier.scopus2-s2.0-84855486166en_US
dc.identifier.isiWOS:000315865800020en_US
dc.relation.volume7en_US
dc.relation.issuee29962en_US
dc.description.firstpage1en_US
dc.description.lastpage9en_US
dc.description.thirdmissionNot applicableen_US
item.cerifentitytypePublications-
item.grantfulltextnone-
item.languageiso639-1en-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.openairetypeArticle-
item.fulltextNo Fulltext-
crisitem.author.orcid0000-0001-7414-0389-
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