Vista Equipo: Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica

Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica

Tropical peatlands are distributed mainly in coastal lowlands; however high elevation regions exhibit a large prevalence of small and fragmented peatlands that are mostly understudied. Artificial drainage of peatlands to expand the area of cattle farming, horticulture, and urbanization is increasing...

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Autores Principales:	Sanchez-Murillo, Ricardo, Gastezzi-Arias, Paola, Sánchez-Gutiérrez, Rolando, Esquivel-Hernández, Germain, Pérez-Salazar, Roy, Poca, María
Formato:	Artículo
Idioma:	Inglés
Publicado:	Frontiers Media (Suiza) 2024
Materias:	DISSOLVED ORGANIC CARBON OPTICAL PROPERTIES VARIABILIDAD CLIMÁTICA DRENAJE FLUORESCENCIA CARBONO TURBERAS
Acceso en línea:	http://hdl.handle.net/11056/27814 https://doi.org/10.3389/frwa.2021.742780

id	RepoUNACR27814
recordtype	dspace
spelling	RepoUNACR278142024-05-02T22:23:09Z Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica Sanchez-Murillo, Ricardo Gastezzi-Arias, Paola Sánchez-Gutiérrez, Rolando Esquivel-Hernández, Germain Pérez-Salazar, Roy Poca, María DISSOLVED ORGANIC CARBON OPTICAL PROPERTIES VARIABILIDAD CLIMÁTICA DRENAJE FLUORESCENCIA CARBONO TURBERAS Tropical peatlands are distributed mainly in coastal lowlands; however high elevation regions exhibit a large prevalence of small and fragmented peatlands that are mostly understudied. Artificial drainage of peatlands to expand the area of cattle farming, horticulture, and urbanization is increasing carbon losses to the atmosphere and streams worldwide. Here, we present an exploratory characterization of dissolved carbon optical properties in ombrotrophic peat bogs of the Talamanca range of Costa Rica, across an altitudinal gradient (2,400–3,100 m a.s.l.) during the rainy season. Dissolved organic matter (DOM) sources and decomposition processes were evaluated in the light of dissolved organic and inorganic carbon (DOC and DIC), optical properties, and major water chemistry. DOC concentrations ranged from 0.2 up to 47.0 mg/L. DIC concentrations were below 2 mg/L and δ13CDIC values indicated a mixture between soil organic matter, CO2 in soil water, and to a lesser degree DIC derived from bacterial CO2. Absolute fluorescence intensity of humic-like peaks was 6–7 times greater than fresh-like peaks across all sites. Fluorescence peak ratios coupled with the biological and humification indexes point to a greater relative contribution of recalcitrant soil-derived DOM. Excitation/Emission matrices denoted a high prevalence of humic and fulvic acids in the peat bogs, with moderate intensities in soluble microbial by-products-like and aromatic protein regions at three sites. Our data provides a baseline to underpin tropical carbon dynamics across high elevation peatlands. Las turberas tropicales se distribuyen principalmente en las tierras bajas costeras; sin embargo, las regiones de gran elevación exhiben una gran prevalencia de turberas pequeñas y fragmentadas que en su mayoría están poco estudiadas. El drenaje artificial de turberas para ampliar el área de ganadería, horticultura y urbanización está aumentando las pérdidas de carbono a la atmósfera y a los arroyos en todo el mundo. Aquí, presentamos una caracterización exploratoria de las propiedades ópticas del carbono disuelto en turberas ombrotróficas de la cordillera de Talamanca en Costa Rica, a través de un gradiente altitudinal (2,400–3,100 m s.n.m.) durante la temporada de lluvias. Las fuentes de materia orgánica disuelta (DOM) y los procesos de descomposición se evaluaron a la luz del carbono orgánico e inorgánico disuelto (DOC y DIC), las propiedades ópticas y la química principal del agua. Las concentraciones de DOC oscilaron entre 0,2 y 47,0 mg/l. Las concentraciones de DIC fueron inferiores a 2 mg/L y los valores de δ13CDIC indicaron una mezcla entre la materia orgánica del suelo, el CO2 en el agua del suelo y, en menor grado, la DIC derivada del CO2 bacteriano. La intensidad de fluorescencia absoluta de los picos de tipo húmico fue de 6 a 7 veces mayor que la de los picos de tipo fresco en todos los sitios. Las proporciones de los picos de fluorescencia junto con los índices biológicos y de humificación apuntan a una mayor contribución relativa de la DOM recalcitrante derivada del suelo. Las matrices de excitación/emisión denotaron una alta prevalencia de ácidos húmicos y fúlvicos en las turberas, con intensidades moderadas en regiones de proteínas aromáticas y subproductos microbianos solubles en tres sitios. Nuestros datos proporcionan una base para sustentar la dinámica del carbono tropical en las turberas de gran altitud. Universidad Nacional, Costa Rica Frontiers Media, Suiza Escuela de Química 2024-05-02T22:23:05Z 2024-05-02T22:23:05Z 2022-01 http://purl.org/coar/resource_type/c_6501 http://hdl.handle.net/11056/27814 https://doi.org/10.3389/frwa.2021.742780 eng Acceso abierto http://creativecommons.org/licenses/by-nc-nd/4.0/ application/pdf Frontiers Media (Suiza) Frontiers in Water Vol.3 1-12 ene 2022
institution	Universidad Nacional de Costa Rica
collection	Repositorio UNA-Costa Rica
language	Inglés
topic	DISSOLVED ORGANIC CARBON OPTICAL PROPERTIES VARIABILIDAD CLIMÁTICA DRENAJE FLUORESCENCIA CARBONO TURBERAS
spellingShingle	DISSOLVED ORGANIC CARBON OPTICAL PROPERTIES VARIABILIDAD CLIMÁTICA DRENAJE FLUORESCENCIA CARBONO TURBERAS Sanchez-Murillo, Ricardo Gastezzi-Arias, Paola Sánchez-Gutiérrez, Rolando Esquivel-Hernández, Germain Pérez-Salazar, Roy Poca, María Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica
description	Tropical peatlands are distributed mainly in coastal lowlands; however high elevation regions exhibit a large prevalence of small and fragmented peatlands that are mostly understudied. Artificial drainage of peatlands to expand the area of cattle farming, horticulture, and urbanization is increasing carbon losses to the atmosphere and streams worldwide. Here, we present an exploratory characterization of dissolved carbon optical properties in ombrotrophic peat bogs of the Talamanca range of Costa Rica, across an altitudinal gradient (2,400–3,100 m a.s.l.) during the rainy season. Dissolved organic matter (DOM) sources and decomposition processes were evaluated in the light of dissolved organic and inorganic carbon (DOC and DIC), optical properties, and major water chemistry. DOC concentrations ranged from 0.2 up to 47.0 mg/L. DIC concentrations were below 2 mg/L and δ13CDIC values indicated a mixture between soil organic matter, CO2 in soil water, and to a lesser degree DIC derived from bacterial CO2. Absolute fluorescence intensity of humic-like peaks was 6–7 times greater than fresh-like peaks across all sites. Fluorescence peak ratios coupled with the biological and humification indexes point to a greater relative contribution of recalcitrant soil-derived DOM. Excitation/Emission matrices denoted a high prevalence of humic and fulvic acids in the peat bogs, with moderate intensities in soluble microbial by-products-like and aromatic protein regions at three sites. Our data provides a baseline to underpin tropical carbon dynamics across high elevation peatlands.
format	Artículo
author	Sanchez-Murillo, Ricardo Gastezzi-Arias, Paola Sánchez-Gutiérrez, Rolando Esquivel-Hernández, Germain Pérez-Salazar, Roy Poca, María
author_sort	Sanchez-Murillo, Ricardo
title	Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica
title_short	Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica
title_full	Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica
title_fullStr	Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica
title_full_unstemmed	Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica
title_sort	exploring dissolved organic carbon variations in a high elevation tropical peatland ecosystem: cerro de la muerte, costa rica
publisher	Frontiers Media (Suiza)
publishDate	2024
url	http://hdl.handle.net/11056/27814 https://doi.org/10.3389/frwa.2021.742780
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score	12.245679

Exploring Dissolved Organic Carbon Variations in a High Elevation Tropical Peatland Ecosystem: Cerro de la Muerte, Costa Rica

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