Evaluation of the importance of sediment organic matter composition for CH4 production by microcosm tests with and without addition of natural sources (cyanobacterial biomass and riparian pasture) in two subtropical, eutrophic reservoirs

Dublin Core

Title

Evaluation of the importance of sediment organic matter composition for CH4 production by microcosm tests with and without addition of natural sources (cyanobacterial biomass and riparian pasture) in two subtropical, eutrophic reservoirs

Subject

EUTROFIZACION
MATERIA ORGANICA
SEDIMENTOS
METANOGENESIS
ECOSISTEMAS COSTEROS
ECOSISTEMAS ACUATICOS
EMBALSES
BIBLIOGRAFIA NACIONAL QUIMICA
2025

Abstract

The biochemical composition of sediments, which depends on the origin of the organic matter (OM), is decisive in methane ( CH4) production. This study aimed to determine the CH4 produced under anaerobic conditions from different substrates: native reservoir sediments and sediments with the addition of complex OM from Microcystis spp. blooms and terrestrial plants (pasture), alongside the biochemical characterization of the substrates used. The biochemical composition of the sediments explained the differences in CH4 production rate (μmol/g OM/day). Positive correlations were found between CH4 production rate and proteins (PRT) (r = 0.695), lipids (LIP) (r = 0.582), TN (r = 0.605), and biopolymeric carbon (BPC) (r = 0.784). Principal component analysis showed an association of CH4 production rate with PRT, LIP, TN, and BPC concentrations, sharing the same direction of the vectors. The addition of Microcystis bloom and pasture to the sediments significantly increased the rate and production of CH4 compared to native sediments, with higher values for bloom addition. In the studied reservoirs, cyanobacteria biomass is a very important source of organic matter to the sediments and a support for methanogenesis. Nonetheless, OM from surrounding vegetation, mainly pastures, could also play a significant role during events that increase reservoir levels, generating important CH4 emission “hot spots” at the periphery of the reservoirs.

Creator

González-Piana, Mauricio
Fernández-Scavino, Ana
Abe, Donato Seiji
Sidagis, Corina
Garreta, Celina
Venturini, Natalia
Martinez, Stefani
Cuevas, Julieta
De Giacomi, Sol
Chalar, Guillermo

Source

Environmental Science and Pollution Research, v.32,2025.-- pp. 4257 - 4272

Publisher

Springer

Date

2025

Rights

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Format

PDF

Extent

16 p.

Language

Inglés

Type

Artículo

Identifier

10.1007/s11356-025-35943-1

Document Item Type Metadata

Original Format

PDF
Date Added
December 18, 2025
Collection
Bibliografía Nacional Química
Item Type
Document
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Citation
González-Piana, Mauricio et al., “Evaluation of the importance of sediment organic matter composition for CH4 production by microcosm tests with and without addition of natural sources (cyanobacterial biomass and riparian pasture) in two subtropical, eutrophic reservoirs,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed January 2, 2026, https://riquim.fq.edu.uy/items/show/7045.