Linkages between greenhouse gases (CO2, CH4, and N2O) and dissolved organic matter composition in a shallow estuary

Linkages between greenhouse gases (CO2, CH4, and N2O) and dissolved organic matter composition in a shallow estuary

14 pages, 9 figures, 4 tables

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Bibliographic Details
Main Authors: Amaral, Valentina, Ortega, Teodora, Romera-Castillo, Cristina, Forja, Jesús M.
Other Authors: Agencia Nacional de Investigación e Innovación (Uruguay)
Format: artículo biblioteca
Language:English
Published: Elsevier 2021-09
Subjects:Carbon dioxide, Methane, Nitrous oxide, Fluorescent DOM, Estuaries,
Online Access:http://hdl.handle.net/10261/250228
http://dx.doi.org/10.13039/100008725
http://dx.doi.org/10.13039/501100011033
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spelling dig-icm-es-10261-2502282021-09-16T01:15:30Z Linkages between greenhouse gases (CO2, CH4, and N2O) and dissolved organic matter composition in a shallow estuary Amaral, Valentina Ortega, Teodora Romera-Castillo, Cristina Forja, Jesús M. Agencia Nacional de Investigación e Innovación (Uruguay) Ministerio de Ciencia, Innovación y Universidades (España) Agencia Estatal de Investigación (España) Carbon dioxide Methane Nitrous oxide Fluorescent DOM Estuaries 14 pages, 9 figures, 4 tables Estuarine systems receive large amounts of organic matter that enhance the production of greenhouse gases (GHGs), such as carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O). Despite considerable research on GHGs and dissolved organic matter (DOM) distribution in estuaries, little is known about the linkage between these gases and DOM composition. Here we evaluated the relationship between three GHGs (CO2, CH4, and N2O) and DOM composition, determined through optical properties, in Guadalete estuary (Bay of Cadiz, Spain). The partial pressure of CO2, and CH4 and N2O concentrations ranged between 332.8 and 6807.1 μatm, 19.9–6440.1 nM, and 6.8–283.9 nM, respectively. Thus, the Guadalete estuary was a source of CO2, CH4 and N2O to the atmosphere. We validated three PARAFAC components related to humic-like fluorescence from terrestrial, microbial and effluent sources, and one with protein-like material. Humic-like components accounted for 86% ± 6% of the total FDOM pool, indicating a predominantly allochthonous DOM origin. The three GHGs were significantly linked to DOC concentration and DOM composition, exhibiting different patterns in these linkages. Terrestrial and microbial humic-like substances with increasing aromaticity might enhance pCO2 in Guadalete estuary. Dissolved CH4 concentrations showed the strongest relationship with DOM composition, indicating that humic and protein-like material are linked with their distribution. In contrast, dissolved N2O was only related with the protein-like fraction and with humic-like material derived from anthropogenic activities (sewage and agriculture). Our results further indicate that a possible coupling between benthic fluxes of GHGs and DOM might be occurring in this shallow estuary. We conclude that it is important to account for DOM composition when studying GHGs distribution in estuarine systems to understand their roles and potential responses associated with climate change Valentina Amaral was financed by the National Research and Innovation Agency of Uruguay (ANII) with a Ph.D. fellowship (POS_EXT_2015_1_122780). Cristina Romera-Castillo was funded by the Spanish Ministry of Science and Innovation through a JIN Project with reference PID2019-109889RJ-I00. This study was financed by the Spanish CICYT (Spanish Program for Science and Technology) under contract RTI2018-100865-B-C21 With the institutional support of the ‘Severo Ochoa Centre of Excellence’ accreditation (CEX2019-000928-S) Peer reviewed 2021-09-15T07:45:29Z 2021-09-15T07:45:29Z 2021-09 artículo http://purl.org/coar/resource_type/c_6501 Science of the Total Environment 788: 147863 (2021) 0048-9697 CEX2019-000928-S http://hdl.handle.net/10261/250228 10.1016/j.scitotenv.2021.147863 1879-1026 http://dx.doi.org/10.13039/100008725 http://dx.doi.org/10.13039/501100011033 en #PLACEHOLDER_PARENT_METADATA_VALUE# #PLACEHOLDER_PARENT_METADATA_VALUE# info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/PID2019-109889RJ-I00 info:eu-repo/grantAgreement/AEI/Plan Estatal de Investigación Científica y Técnica y de Innovación 2017-2020/RTI2018-100865-B-C21 Postprint https://doi.org/10.1016/j.scitotenv.2021.147863 Sí embargo_20230930 Elsevier
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
language English
topic Carbon dioxide
Methane
Nitrous oxide
Fluorescent DOM
Estuaries
Carbon dioxide
Methane
Nitrous oxide
Fluorescent DOM
Estuaries
spellingShingle Carbon dioxide
Methane
Nitrous oxide
Fluorescent DOM
Estuaries
Carbon dioxide
Methane
Nitrous oxide
Fluorescent DOM
Estuaries
Amaral, Valentina
Ortega, Teodora
Romera-Castillo, Cristina
Forja, Jesús M.
Linkages between greenhouse gases (CO2, CH4, and N2O) and dissolved organic matter composition in a shallow estuary
description 14 pages, 9 figures, 4 tables
author2 Agencia Nacional de Investigación e Innovación (Uruguay)
author_facet Agencia Nacional de Investigación e Innovación (Uruguay)
Amaral, Valentina
Ortega, Teodora
Romera-Castillo, Cristina
Forja, Jesús M.
format artículo
topic_facet Carbon dioxide
Methane
Nitrous oxide
Fluorescent DOM
Estuaries
author Amaral, Valentina
Ortega, Teodora
Romera-Castillo, Cristina
Forja, Jesús M.
author_sort Amaral, Valentina
title Linkages between greenhouse gases (CO2, CH4, and N2O) and dissolved organic matter composition in a shallow estuary
title_short Linkages between greenhouse gases (CO2, CH4, and N2O) and dissolved organic matter composition in a shallow estuary
title_full Linkages between greenhouse gases (CO2, CH4, and N2O) and dissolved organic matter composition in a shallow estuary
title_fullStr Linkages between greenhouse gases (CO2, CH4, and N2O) and dissolved organic matter composition in a shallow estuary
title_full_unstemmed Linkages between greenhouse gases (CO2, CH4, and N2O) and dissolved organic matter composition in a shallow estuary
title_sort linkages between greenhouse gases (co2, ch4, and n2o) and dissolved organic matter composition in a shallow estuary
publisher Elsevier
publishDate 2021-09
url http://hdl.handle.net/10261/250228
http://dx.doi.org/10.13039/100008725
http://dx.doi.org/10.13039/501100011033
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