Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetland

Detalhes bibliográficos
Autor(a) principal: de los Santos, Carmen B.
Data de Publicação: 2022
Outros Autores: Lahuna, François, Silva, André, Freitas, Cátia, Martins, Márcio, Carrasco, A. Rita, Santos, Rui
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.1/17841
Resumo: Tidal coastal wetlands, common home to seagrass and salt marshes, are relevant carbon sinks due to their high capacity to accumulate and store organic carbon in their sediments. Recent studies demonstrated that the spatial variability of this organic carbon within the same wetland system can be significant. Some of the environmental drivers of this spatial variability remain understudied and the selection of the most relevant ones can be context dependent. Here we investigated the role of bed elevation, hydrodynamics, and habitat type (salt marsh and seagrass) on the organic matter (OM) net deposition-resuspension rate and superficial sedimentary stocks (top 5 cm) at the tidal wetlands of the Ria Formosa, a mesotidal coastal lagoon in South Portugal. Results showed that two vectors of spatial variation need to be considered to describe the intertidal sedimentary OM stocks: the bed elevation that imposes a decrease of the hydroperiod and thus the change of habitat from the lower seagrass Z. noltei to the upper saltmarsh S. maritimus, and the horizontal spatial variation along the secondary channels of the lagoon that imposes a decrease in the current flow velocity magnitude. The multiple linear regression analyses, using data from 40 sampling points, explained 59% of the variation of the superficial sedimentary stocks of OM in salt marshes and seagrasses of the Ria Formosa lagoon and revealed that stocks generally decrease with elevation, yet with variation among sites and habitats. It was also found that the decrease of the OM net deposition-resuspension rate with bed elevation was exponential. Our study emphasizes the importance of considering multiple environmental drivers and spatial variation for regional estimations of organic matter (and organic carbon) sedimentary stocks in coastal wetlands.
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spelling Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetlandOrganic matterSediment depositionHydroperiodTidal wetlandSeagrassSalt marshTidal coastal wetlands, common home to seagrass and salt marshes, are relevant carbon sinks due to their high capacity to accumulate and store organic carbon in their sediments. Recent studies demonstrated that the spatial variability of this organic carbon within the same wetland system can be significant. Some of the environmental drivers of this spatial variability remain understudied and the selection of the most relevant ones can be context dependent. Here we investigated the role of bed elevation, hydrodynamics, and habitat type (salt marsh and seagrass) on the organic matter (OM) net deposition-resuspension rate and superficial sedimentary stocks (top 5 cm) at the tidal wetlands of the Ria Formosa, a mesotidal coastal lagoon in South Portugal. Results showed that two vectors of spatial variation need to be considered to describe the intertidal sedimentary OM stocks: the bed elevation that imposes a decrease of the hydroperiod and thus the change of habitat from the lower seagrass Z. noltei to the upper saltmarsh S. maritimus, and the horizontal spatial variation along the secondary channels of the lagoon that imposes a decrease in the current flow velocity magnitude. The multiple linear regression analyses, using data from 40 sampling points, explained 59% of the variation of the superficial sedimentary stocks of OM in salt marshes and seagrasses of the Ria Formosa lagoon and revealed that stocks generally decrease with elevation, yet with variation among sites and habitats. It was also found that the decrease of the OM net deposition-resuspension rate with bed elevation was exponential. Our study emphasizes the importance of considering multiple environmental drivers and spatial variation for regional estimations of organic matter (and organic carbon) sedimentary stocks in coastal wetlands.ElsevierSapientiade los Santos, Carmen B.Lahuna, FrançoisSilva, AndréFreitas, CátiaMartins, MárcioCarrasco, A. RitaSantos, Rui2022-06-06T13:46:05Z2022-08-052022-06-05T19:13:44Z2022-08-05T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.1/17841eng0272-771410.1016/j.ecss.2022.107896info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-11-29T10:42:53Zoai:sapientia.ualg.pt:10400.1/17841Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-11-29T10:42:53Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetland
title Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetland
spellingShingle Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetland
de los Santos, Carmen B.
Organic matter
Sediment deposition
Hydroperiod
Tidal wetland
Seagrass
Salt marsh
title_short Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetland
title_full Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetland
title_fullStr Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetland
title_full_unstemmed Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetland
title_sort Vertical intertidal variation of organic matter stocks and patterns of sediment deposition in a mesotidal coastal wetland
author de los Santos, Carmen B.
author_facet de los Santos, Carmen B.
Lahuna, François
Silva, André
Freitas, Cátia
Martins, Márcio
Carrasco, A. Rita
Santos, Rui
author_role author
author2 Lahuna, François
Silva, André
Freitas, Cátia
Martins, Márcio
Carrasco, A. Rita
Santos, Rui
author2_role author
author
author
author
author
author
dc.contributor.none.fl_str_mv Sapientia
dc.contributor.author.fl_str_mv de los Santos, Carmen B.
Lahuna, François
Silva, André
Freitas, Cátia
Martins, Márcio
Carrasco, A. Rita
Santos, Rui
dc.subject.por.fl_str_mv Organic matter
Sediment deposition
Hydroperiod
Tidal wetland
Seagrass
Salt marsh
topic Organic matter
Sediment deposition
Hydroperiod
Tidal wetland
Seagrass
Salt marsh
description Tidal coastal wetlands, common home to seagrass and salt marshes, are relevant carbon sinks due to their high capacity to accumulate and store organic carbon in their sediments. Recent studies demonstrated that the spatial variability of this organic carbon within the same wetland system can be significant. Some of the environmental drivers of this spatial variability remain understudied and the selection of the most relevant ones can be context dependent. Here we investigated the role of bed elevation, hydrodynamics, and habitat type (salt marsh and seagrass) on the organic matter (OM) net deposition-resuspension rate and superficial sedimentary stocks (top 5 cm) at the tidal wetlands of the Ria Formosa, a mesotidal coastal lagoon in South Portugal. Results showed that two vectors of spatial variation need to be considered to describe the intertidal sedimentary OM stocks: the bed elevation that imposes a decrease of the hydroperiod and thus the change of habitat from the lower seagrass Z. noltei to the upper saltmarsh S. maritimus, and the horizontal spatial variation along the secondary channels of the lagoon that imposes a decrease in the current flow velocity magnitude. The multiple linear regression analyses, using data from 40 sampling points, explained 59% of the variation of the superficial sedimentary stocks of OM in salt marshes and seagrasses of the Ria Formosa lagoon and revealed that stocks generally decrease with elevation, yet with variation among sites and habitats. It was also found that the decrease of the OM net deposition-resuspension rate with bed elevation was exponential. Our study emphasizes the importance of considering multiple environmental drivers and spatial variation for regional estimations of organic matter (and organic carbon) sedimentary stocks in coastal wetlands.
publishDate 2022
dc.date.none.fl_str_mv 2022-06-06T13:46:05Z
2022-08-05
2022-06-05T19:13:44Z
2022-08-05T00:00:00Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.1/17841
url http://hdl.handle.net/10400.1/17841
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 0272-7714
10.1016/j.ecss.2022.107896
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv mluisa.alvim@gmail.com
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