An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)

Autores
Pratolongo, Paula Daniela; Funk, Flavia Alejandra; Zapperi, Georgina María; Hawkes, Andrea
Año de publicación
2019
Idioma
inglés
Tipo de recurso
documento de conferencia
Estado
versión publicada
Descripción
Coastal marshes store large amounts of organic carbon in their sediments and account for an important fraction of carbon storage in the ocean and adjacencies. However, the magnitude of carbon storage in salt marsh soil deposits is variable, and adequate inventories have not been made for most coastal settings in the southern hemisphere. We quantified and characterized the soil organic carbon pool stored in Sarcocornia perennis marshes of the Bahía Blanca Estuary, a major coastal wetland system in the SW Atlantic. Land cover classes were mapped from aerial photographs (year 1967) and high-resolution satellite images (years 2005 and 2017) and rates of salt marsh erosion were evaluated. Erosion rates of S. perennis marshes (% loss per year) increased from 0.8 % (from 1967 to 2005) to 2.0 % (from 2005 to 2017). For this later period, salt marshes lost to mudflats at an average rate of 1.03 km2 year -1. Considering the average erosion depths and soil organic carbon densities, between 2005 and 2017 the northern section of the Bahia Blanca Estuary exported organic carbon at a rate of 2893 tC year-1. The stored organic material under erosion presents a very low C : N ratio (8 - 10), and its bulk isotopic composition (δ13C -24.7 to -16.8 ‰; δ15N +8.7 to +11.3 ‰) reflects a dominance of organic matter of marine origin. Bulk organic matter from a deep section of one core (2.14 m below surface) was 14C dated 4710 ± 30 years BP. In the study area, transgressive sea level events took place throughout the Holocene. Thus, the presently intertidal platform occupied by S. perennis marshes is likely composed of marine deposits that formed under a higher relative sea level. Under the current rates of relative sea level rise (+1.51 + 0.32 mm year-1, Buenos Aires Harbor) there is accelerated erosion, and salt marsh soils act as a significant net source of organic carbon and nitrogen to estuarine waters.
Fil: Pratolongo, Paula Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Funk, Flavia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Zapperi, Georgina María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Hawkes, Andrea. University Of North Carolina In Wilmington; Estados Unidos
XVIII Congreso Latinoamericano de Ciencias del Mar COLACMAR 2019
Mar del Plata
Argentina
Instituto Nacional de Investigación y Desarrollo Pesquero
Asociación Latinoamericana de Investigadores en Ciencias del Mar
Universidad Nacional de Mar del Plata
Materia
SOIL ORGANIC CARBON
SARCOCORNIA PERENNIS
MARSH LOSS
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/231784
Acceder
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network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)Pratolongo, Paula DanielaFunk, Flavia AlejandraZapperi, Georgina MaríaHawkes, AndreaSOIL ORGANIC CARBONSARCOCORNIA PERENNISMARSH LOSShttps://purl.org/becyt/ford/1.6https://purl.org/becyt/ford/1Coastal marshes store large amounts of organic carbon in their sediments and account for an important fraction of carbon storage in the ocean and adjacencies. However, the magnitude of carbon storage in salt marsh soil deposits is variable, and adequate inventories have not been made for most coastal settings in the southern hemisphere. We quantified and characterized the soil organic carbon pool stored in Sarcocornia perennis marshes of the Bahía Blanca Estuary, a major coastal wetland system in the SW Atlantic. Land cover classes were mapped from aerial photographs (year 1967) and high-resolution satellite images (years 2005 and 2017) and rates of salt marsh erosion were evaluated. Erosion rates of S. perennis marshes (% loss per year) increased from 0.8 % (from 1967 to 2005) to 2.0 % (from 2005 to 2017). For this later period, salt marshes lost to mudflats at an average rate of 1.03 km2 year -1. Considering the average erosion depths and soil organic carbon densities, between 2005 and 2017 the northern section of the Bahia Blanca Estuary exported organic carbon at a rate of 2893 tC year-1. The stored organic material under erosion presents a very low C : N ratio (8 - 10), and its bulk isotopic composition (δ13C -24.7 to -16.8 ‰; δ15N +8.7 to +11.3 ‰) reflects a dominance of organic matter of marine origin. Bulk organic matter from a deep section of one core (2.14 m below surface) was 14C dated 4710 ± 30 years BP. In the study area, transgressive sea level events took place throughout the Holocene. Thus, the presently intertidal platform occupied by S. perennis marshes is likely composed of marine deposits that formed under a higher relative sea level. Under the current rates of relative sea level rise (+1.51 + 0.32 mm year-1, Buenos Aires Harbor) there is accelerated erosion, and salt marsh soils act as a significant net source of organic carbon and nitrogen to estuarine waters.Fil: Pratolongo, Paula Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Funk, Flavia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Zapperi, Georgina María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; ArgentinaFil: Hawkes, Andrea. University Of North Carolina In Wilmington; Estados UnidosXVIII Congreso Latinoamericano de Ciencias del Mar COLACMAR 2019Mar del PlataArgentinaInstituto Nacional de Investigación y Desarrollo PesqueroAsociación Latinoamericana de Investigadores en Ciencias del MarUniversidad Nacional de Mar del PlataAsociación Latinoamericana de Investigadores en Ciencias del Mar-ALICMAR2019info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectCongresoBookhttp://purl.org/coar/resource_type/c_5794info:ar-repo/semantics/documentoDeConferenciaapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/231784An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina); XVIII Congreso Latinoamericano de Ciencias del Mar COLACMAR 2019; Mar del Plata; Argentina; 2019; 1 - 5CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://rid.unrn.edu.ar/bitstream/20.500.12049/3880/3/LIBRO-DE-RESUMENES-COLACMAR-2019.pdfInternacionalinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-03T10:06:54Zoai:ri.conicet.gov.ar:11336/231784instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-03 10:06:54.413CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)
title An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)
spellingShingle An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)
Pratolongo, Paula Daniela
SOIL ORGANIC CARBON
SARCOCORNIA PERENNIS
MARSH LOSS
title_short An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)
title_full An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)
title_fullStr An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)
title_full_unstemmed An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)
title_sort An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina)
dc.creator.none.fl_str_mv Pratolongo, Paula Daniela
Funk, Flavia Alejandra
Zapperi, Georgina María
Hawkes, Andrea
author Pratolongo, Paula Daniela
author_facet Pratolongo, Paula Daniela
Funk, Flavia Alejandra
Zapperi, Georgina María
Hawkes, Andrea
author_role author
author2 Funk, Flavia Alejandra
Zapperi, Georgina María
Hawkes, Andrea
author2_role author
author
author
dc.subject.none.fl_str_mv SOIL ORGANIC CARBON
SARCOCORNIA PERENNIS
MARSH LOSS
topic SOIL ORGANIC CARBON
SARCOCORNIA PERENNIS
MARSH LOSS
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.6
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Coastal marshes store large amounts of organic carbon in their sediments and account for an important fraction of carbon storage in the ocean and adjacencies. However, the magnitude of carbon storage in salt marsh soil deposits is variable, and adequate inventories have not been made for most coastal settings in the southern hemisphere. We quantified and characterized the soil organic carbon pool stored in Sarcocornia perennis marshes of the Bahía Blanca Estuary, a major coastal wetland system in the SW Atlantic. Land cover classes were mapped from aerial photographs (year 1967) and high-resolution satellite images (years 2005 and 2017) and rates of salt marsh erosion were evaluated. Erosion rates of S. perennis marshes (% loss per year) increased from 0.8 % (from 1967 to 2005) to 2.0 % (from 2005 to 2017). For this later period, salt marshes lost to mudflats at an average rate of 1.03 km2 year -1. Considering the average erosion depths and soil organic carbon densities, between 2005 and 2017 the northern section of the Bahia Blanca Estuary exported organic carbon at a rate of 2893 tC year-1. The stored organic material under erosion presents a very low C : N ratio (8 - 10), and its bulk isotopic composition (δ13C -24.7 to -16.8 ‰; δ15N +8.7 to +11.3 ‰) reflects a dominance of organic matter of marine origin. Bulk organic matter from a deep section of one core (2.14 m below surface) was 14C dated 4710 ± 30 years BP. In the study area, transgressive sea level events took place throughout the Holocene. Thus, the presently intertidal platform occupied by S. perennis marshes is likely composed of marine deposits that formed under a higher relative sea level. Under the current rates of relative sea level rise (+1.51 + 0.32 mm year-1, Buenos Aires Harbor) there is accelerated erosion, and salt marsh soils act as a significant net source of organic carbon and nitrogen to estuarine waters.
Fil: Pratolongo, Paula Daniela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Funk, Flavia Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Zapperi, Georgina María. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Argentino de Oceanografía. Universidad Nacional del Sur. Instituto Argentino de Oceanografía; Argentina. Universidad Nacional del Sur. Departamento de Biología, Bioquímica y Farmacia; Argentina
Fil: Hawkes, Andrea. University Of North Carolina In Wilmington; Estados Unidos
XVIII Congreso Latinoamericano de Ciencias del Mar COLACMAR 2019
Mar del Plata
Argentina
Instituto Nacional de Investigación y Desarrollo Pesquero
Asociación Latinoamericana de Investigadores en Ciencias del Mar
Universidad Nacional de Mar del Plata
description Coastal marshes store large amounts of organic carbon in their sediments and account for an important fraction of carbon storage in the ocean and adjacencies. However, the magnitude of carbon storage in salt marsh soil deposits is variable, and adequate inventories have not been made for most coastal settings in the southern hemisphere. We quantified and characterized the soil organic carbon pool stored in Sarcocornia perennis marshes of the Bahía Blanca Estuary, a major coastal wetland system in the SW Atlantic. Land cover classes were mapped from aerial photographs (year 1967) and high-resolution satellite images (years 2005 and 2017) and rates of salt marsh erosion were evaluated. Erosion rates of S. perennis marshes (% loss per year) increased from 0.8 % (from 1967 to 2005) to 2.0 % (from 2005 to 2017). For this later period, salt marshes lost to mudflats at an average rate of 1.03 km2 year -1. Considering the average erosion depths and soil organic carbon densities, between 2005 and 2017 the northern section of the Bahia Blanca Estuary exported organic carbon at a rate of 2893 tC year-1. The stored organic material under erosion presents a very low C : N ratio (8 - 10), and its bulk isotopic composition (δ13C -24.7 to -16.8 ‰; δ15N +8.7 to +11.3 ‰) reflects a dominance of organic matter of marine origin. Bulk organic matter from a deep section of one core (2.14 m below surface) was 14C dated 4710 ± 30 years BP. In the study area, transgressive sea level events took place throughout the Holocene. Thus, the presently intertidal platform occupied by S. perennis marshes is likely composed of marine deposits that formed under a higher relative sea level. Under the current rates of relative sea level rise (+1.51 + 0.32 mm year-1, Buenos Aires Harbor) there is accelerated erosion, and salt marsh soils act as a significant net source of organic carbon and nitrogen to estuarine waters.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/publishedVersion
info:eu-repo/semantics/conferenceObject
Congreso
Book
http://purl.org/coar/resource_type/c_5794
info:ar-repo/semantics/documentoDeConferencia
status_str publishedVersion
format conferenceObject
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/231784
An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina); XVIII Congreso Latinoamericano de Ciencias del Mar COLACMAR 2019; Mar del Plata; Argentina; 2019; 1 - 5
CONICET Digital
CONICET
url http://hdl.handle.net/11336/231784
identifier_str_mv An estimate of soil organic carbon released by erosion of salt marshes in the Bahía Blanca estuary (Argentina); XVIII Congreso Latinoamericano de Ciencias del Mar COLACMAR 2019; Mar del Plata; Argentina; 2019; 1 - 5
CONICET Digital
CONICET
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language eng
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dc.publisher.none.fl_str_mv Asociación Latinoamericana de Investigadores en Ciencias del Mar-ALICMAR
publisher.none.fl_str_mv Asociación Latinoamericana de Investigadores en Ciencias del Mar-ALICMAR
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reponame_str CONICET Digital (CONICET)
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instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
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