Chronology of recent sedimentation and geochemical characteristics of sediments in Alvarado Lagoon, Veracruz (southwestern gulf of Mexico)

Chronology of recent sedimentation and geochemical characteristics of sediments in Alvarado Lagoon, Veracruz (southwestern gulf of Mexico)

Coastal lagoons are very sensitive to anthropogenic impacts and sedimentary records may provide valuable temporal reconstructions of the environmental changes in the lagoon, the coastal zone, and the catchment area. The Alvarado Lagoon (Veracruz, southwestern gulf of Mexico) belongs to an extensive...

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Autores principales: Ruiz-Fernández, Ana Carolina, Maanan, Mohamed, Sanchez-Cabeza, Joan Albert, Pérez-Bernal, Libia Hascibe, López-Mendoza, Perla, Limoges, Audrey
Formato: info:eu-repo/semantics/article
Lenguaje:eng
Publicado: Iniversidad Autónoma de Baja California 2015
Acceso en línea:https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2473
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language eng
description Coastal lagoons are very sensitive to anthropogenic impacts and sedimentary records may provide valuable temporal reconstructions of the environmental changes in the lagoon, the coastal zone, and the catchment area. The Alvarado Lagoon (Veracruz, southwestern gulf of Mexico) belongs to an extensive complex of wetlands recognized as a Ramsar site. However, its catchment basin has one of the highest deforestation rates in Mexico due to the transformation of lowlands for agriculture and grazing, thus causing siltation of the surrounding aquatic bodies. To evaluate the impact of land use change on Alvarado Lagoon, sediment fluxes and provenance were reconstructed by studying the elemental composition (determined by X-ray fluorescence spectrometry) of a sediment core dated radiometrically (210Pb, 137Cs, 239,240Pu). The sedimentary record showed an acceleration of the sediment accumulation rate during more than 134 ± 17 years; however, the changes in elemental composition during the past 40 years (i.e., 1972–2011) indicated the incorporation of continental weathered sediments and an increment of sediment accumulation of circa 470%, in coincidence with the period of higher deforestation and siltation. The recent increase in sediment accumulation rates and changes in geochemical features are attributed to erosion caused by land use changes in the Alvarado Lagoon drainage basin. 
format info:eu-repo/semantics/article
author Ruiz-Fernández, Ana Carolina
Maanan, Mohamed
Sanchez-Cabeza, Joan Albert
Pérez-Bernal, Libia Hascibe
López-Mendoza, Perla
Limoges, Audrey
spellingShingle Ruiz-Fernández, Ana Carolina
Maanan, Mohamed
Sanchez-Cabeza, Joan Albert
Pérez-Bernal, Libia Hascibe
López-Mendoza, Perla
Limoges, Audrey
Chronology of recent sedimentation and geochemical characteristics of sediments in Alvarado Lagoon, Veracruz (southwestern gulf of Mexico)
author_facet Ruiz-Fernández, Ana Carolina
Maanan, Mohamed
Sanchez-Cabeza, Joan Albert
Pérez-Bernal, Libia Hascibe
López-Mendoza, Perla
Limoges, Audrey
author_sort Ruiz-Fernández, Ana Carolina
title Chronology of recent sedimentation and geochemical characteristics of sediments in Alvarado Lagoon, Veracruz (southwestern gulf of Mexico)
title_short Chronology of recent sedimentation and geochemical characteristics of sediments in Alvarado Lagoon, Veracruz (southwestern gulf of Mexico)
title_full Chronology of recent sedimentation and geochemical characteristics of sediments in Alvarado Lagoon, Veracruz (southwestern gulf of Mexico)
title_fullStr Chronology of recent sedimentation and geochemical characteristics of sediments in Alvarado Lagoon, Veracruz (southwestern gulf of Mexico)
title_full_unstemmed Chronology of recent sedimentation and geochemical characteristics of sediments in Alvarado Lagoon, Veracruz (southwestern gulf of Mexico)
title_sort chronology of recent sedimentation and geochemical characteristics of sediments in alvarado lagoon, veracruz (southwestern gulf of mexico)
publisher Iniversidad Autónoma de Baja California
publishDate 2015
url https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2473
_version_ 1792610711187226624
spelling repositorioinstitucional-20.500.12930-74732023-05-09T14:30:59Z Chronology of recent sedimentation and geochemical characteristics of sediments in Alvarado Lagoon, Veracruz (southwestern gulf of Mexico) Cronología de la sedimentación recientey caracterización geoquímica de los sedimentos de la laguna de Alvarado, Veracruz (suroeste del golfo de México) Ruiz-Fernández, Ana Carolina Maanan, Mohamed Sanchez-Cabeza, Joan Albert Pérez-Bernal, Libia Hascibe López-Mendoza, Perla Limoges, Audrey Coastal lagoons are very sensitive to anthropogenic impacts and sedimentary records may provide valuable temporal reconstructions of the environmental changes in the lagoon, the coastal zone, and the catchment area. The Alvarado Lagoon (Veracruz, southwestern gulf of Mexico) belongs to an extensive complex of wetlands recognized as a Ramsar site. However, its catchment basin has one of the highest deforestation rates in Mexico due to the transformation of lowlands for agriculture and grazing, thus causing siltation of the surrounding aquatic bodies. To evaluate the impact of land use change on Alvarado Lagoon, sediment fluxes and provenance were reconstructed by studying the elemental composition (determined by X-ray fluorescence spectrometry) of a sediment core dated radiometrically (210Pb, 137Cs, 239,240Pu). The sedimentary record showed an acceleration of the sediment accumulation rate during more than 134 ± 17 years; however, the changes in elemental composition during the past 40 years (i.e., 1972–2011) indicated the incorporation of continental weathered sediments and an increment of sediment accumulation of circa 470%, in coincidence with the period of higher deforestation and siltation. The recent increase in sediment accumulation rates and changes in geochemical features are attributed to erosion caused by land use changes in the Alvarado Lagoon drainage basin.  Las lagunas costeras son altamente sensibles a los impactos antrópicos, y los registros sedimentarios pueden proporcionar valiosas reconstrucciones temporales de los cambios ambientales en la laguna, la zona costera y la cuenca de captación. La laguna de Alvarado (Veracruz, suroeste del golfo de México) es parte de un amplio complejo de humedales reconocido como sitio Ramsar. Sin embargo, su cuenca de captación es una de las zonas de México con mayores tasas de deforestación debido a la transformación de tierras bajas en pastizales y terrenos de cultivo, y esto ha repercutido en problemas de azolvamiento en los cuerpos de agua aledaños. Con el propósito de evaluar el impacto del cambio de uso del suelo sobre la laguna de Alvarado, se reconstruyeron los cambios en el flujo y procedencia de los sedimentos por medio del estudio de la composición elemental (determinada por espectrometría de fluorescencia de rayos X) de un núcleo sedimentario fechado por métodos radiométricos (210Pb, 137Cs, 239,240Pu). El registro sedimentario mostró evidencia del aceleramiento del ritmo de sedimentación desde hace más de 134 ± 17 años; sin embargo, durante los últimos 40 años (1972–2011) se observaron cambios en la composición elemental que señalan la incorporación de sedimentos intemperizados de origen continental, así como un incremento de alrededor del 470% en las tasas de acumulación sedimentaria, que coinciden con los periodos de mayor deforestación y azolvamiento. Los incrementos recientes en las tasas de acumulación y el cambio en las características geoquímicas se atribuyeron a la erosión causada por cambios de uso del suelo en la cuenca de drenaje de la laguna de Alvarado. 2015-03-05 2021-06-03T03:55:24Z 2021-06-03T03:55:24Z info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Artículo Arbitrado https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2473 10.7773/cm.v40i4.2473 https://hdl.handle.net/20.500.12930/7473 eng https://www.cienciasmarinas.com.mx/index.php/cmarinas/article/view/2473/1537 Copyright (c) 2015 Ciencias Marinas application/pdf Iniversidad Autónoma de Baja California Ciencias Marinas; Vol. 40 No. 4 (2014); 291-303 Ciencias Marinas; Vol. 40 Núm. 4 (2014); 291-303 2395-9053 0185-3880

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