Data/hora: 17/06/2024 15:14:25

Biblioteca(s): | Embrapa Agricultura Digital; Embrapa Pantanal.
Data corrente: | 26/09/2022
Data da última atualização: | 26/09/2022
Autoria: | LO, E. L.; YEAGER, K, M.; BERGIER, I.; DOMINGOS-LUZ, L.; SILVA, A.; MCGLUE, M. M.
Afiliação: | EDWARD L. LO, UNIVERSITY OF KENTUCKY; KEVIN M. YEAGER, UNIVERSITY OF KENTUCKY; IVAN BERGIER TAVARES DE LIMA, CPAP, CNPTIA; LEANDRO DOMINGOS-LUZ, UNIVERSITY OF KENTUCKY; AGUINALDO SILVA, UNIVERSIDADE FEDERAL DE MATO GROSSO DO SUL; MICHAEL M. MCGLUE, UNIVERSITY OF KENTUCKY.
Título: | Sediment infill of tropical floodplain lakes: rates, controls, and implications for ecosystem services.
Ano de publicação: | 2022
Fonte/Imprenta: | Frontiers in Earth Science, v. 10, 875919, May 2022.
DOI: | https://doi.org/10.3389/feart.2022.875919
Idioma: | Inglês
Conteúdo: | Shallow lakes in tropical floodplains provide significant ecosystem services that can be altered by natural and anthropogenic forces. Despite their importance, little is known about the infill patterns and timescales and the magnitude of these changes in tropical floodplain lakes. Here, we present a global meta-analysis of sediment core-derived accumulation rate data for shallow floodplain lakes in tropical lowlands to quantify the timescales of basin infill. Environmental variables (e.g., sediment accumulation rates, bathymetry, surface area) were compiled from the literature or derived from remote sensing imagery, resulting in a database (n = 76 lakes) that includes various lake morphologies. Our results show an exponential increase in sediment accumulation rates in many of these lakes over the past 50 years, which we interpret as a response to growing human populations and deforestation, particularly in topographically steep watersheds with pronounced seasonal rainfall. Over centennial periods, tropical floodplain lakes accumulate sediment faster than many other extratropical lakes. The dataset suggests that complete infill of some tropical floodplain lakes will occur in as little as a few centuries. Our findings also reveal the critical environmental and human factors that influence sediment accumulation patterns and affect ecosystem services in shallow tropical floodplain lakes. These findings have important implications for water and sediment management in low latitude watersheds, many of which are located in densely populated and/or developing nations.
Palavras-Chave: | 210Pb; Limnogeology; Planície tropical; Radiocarbon; Radiocarbono; Sedimentation rates; Taxa de sedimentação; Tropical lowland.
Thesagro: | Chumbo; Desmatamento.
Thesaurus Nal: | Deforestation.
Categoria do assunto: | --
URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1146801/1/Sediment-Infill-of-Tropical-Floodplain-2022.pdf
Registro original: | Embrapa Pantanal (CPAP)

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