Patterns and controls of carbon dioxide concentration and fluxes at the air–water interface in South American lowland streams

Feijoó, Claudia; Arroita, Maite; Messetta, María Laura; Anselmo, Julieta; Rigacci, Laura; Schiller, Daniel von

doi:10.1007/s00027-022-00852-9

Cited by 3 publications

(2 citation statements)

References 64 publications

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“…Others have shown that pCO 2 might be controlled by external groundwater inputs of dissolved inorganic carbon rather than by internal metabolism. Feijoó et al, 2022, Arroita, M. Messetta, M. L. et al (2022 showed all streams in their study were net emitters of CO 2 , supersaturated with CO 2 , to the atmosphere, even those that were not net heterotrophic.…”

Section: R E T R a C T E Dmentioning

confidence: 91%

RETRACTED: Globally, Freshwater Ecosystems Emit More CO2 Than the Burning of Fossil Fuels

Pollard

2022

Front. Environ. Sci.

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Freshwater emits substantial volumes of CO2 to the atmosphere. This has largely gone unnoticed in global carbon budgets. My aim was to quantify the CO2 emanating from freshwater from 66° N to 47° S latitudes via in situ bacterial respiration (BR). I determined BR (n = 326) as a function of water temperature. Freshwater is emitting CO2 at a rate of 58.5 Pg C y−1 (six times that of fossil fuel burning). Most is emitted from the Northern Hemisphere. This is because the high northern summer temperatures coincide with most of the world’s freshwater. Diffuse DOC sources, for example dust, may be driving high freshwater BR. However, many sources remain elusive and not individually quantified in the literature. We must include freshwater CO2 emissions in climate models. Identifying, quantifying and managing freshwater’s diffuse sources of Dissolved Organic Carbon (DOC) will hopefully provide us with another opportunity to change our current climate trajectory.

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Section: R E T R a C T E Dmentioning

confidence: 91%

RETRACTED: Globally, Freshwater Ecosystems Emit More CO2 Than the Burning of Fossil Fuels

Pollard

2022

Front. Environ. Sci.

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“…1), probably with lower gas transfer rates relative to smaller rivers and streams. On the other hand, the CO 2 emissions we compiled are within the range reported for Pampean plain streams (Feijoó et al, 2022).…”

Section: Patterns For Co 2 and Ch 4 Emission Pathways And Methods Use...supporting

confidence: 75%

Carbon dioxide and methane emissions across tropical and subtropical inland water ecosystems in Brazil: meta-analysis of general patterns and potential drivers

de Souza Ferreira,

Dodds,

Fernandes Cunha

2023

Limnetica

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Investigations on CO2 and CH4 emissions from aquatic systems have increased in the last decades, but most studies focus on high-latitude water bodies, with limited information available for tropical and subtropical zones. Here, we compiled CO2 and CH4 emissions by lentic, lotic, and other types of aquatic ecosystems (e.g., floodplains, estuaries, and mangroves) in different biomes in Brazil. We used a literature search of papers published in the last ~ 30 years to analyze reported emission rates, if they were from the diffusive (DF) and/or ebullitive (EB) pathways, and the most used methods. Most studies were carried out in two biomes (Amazon and Atlantic rainforest). The highest emissions were reported in lentic ecosystems (from 0.05 to 4568 mmol CO2 m-2 day-1, and from 0.19 to 348 mmol CH4 m-2 day-1). The DF pathway was more frequently analyzed, and the floating chamber was the most used measurement method. Our analyses indicated the EB pathway can be significant, especially for CH4 in shallow waters. There were many missing data for either DF or EB so we used studies that measured both and system depth to estimate the missing values and then used total emissions (DF+EB) to run predictive models. For the CO2 emissions, pH, water depth, dissolved oxygen, and water temperature were important predictors, whereas the potential drivers for the CH4 emissions were electrical conductivity and the CO2 emissions. More data are necessary to more clearly characterize the drivers of the emissions of such gases, further understand the dynamics of their emissions, as well as refine emission inventories on both regional and global scales in tropical regions.

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Assessing the aquatic metabolic-balance response to future condition in a Mediterranean site: from an experimental-design perspective

Lozano

2024

Mar. Freshw. Res.

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Context Metabolic balance determines whether an ecosystem acts as a source or sink of carbon dioxide (CO2) and considering that a substantial portion of inland aquatic ecosystems act as a source of CO2 to the atmosphere, it is important to highlight that there is still no agreement on how global change will affect the ecosystem metabolic-balance response. It then becomes more important to study the interactions between global-change drivers and aquatic metabolism. Aims Assess possible shifts in ecosystem metabolic balance owing to global-change factors. Methods Collapsed factorial designs and novel experimental units have been used to study responses to future conditions. Key results In the study site, bacterial production was not affected by an increased temperature alone; however, increased nutrient availability may unmask UV or CO2 as a source of stress to bacteria. A synergistic effect between temperature and the combined effect of nutrients and CO2 on primary producers was also found. Conclusions In future scenarios, some heterotrophic inland water ecosystems may shift from heterotrophic to autotrophic states and therefore act as CO2 sinks. Implications This study provides a framework to support a deepening of knowledge on this topic.

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Patterns and controls of carbon dioxide concentration and fluxes at the air–water interface in South American lowland streams

Cited by 3 publications

References 64 publications

RETRACTED: Globally, Freshwater Ecosystems Emit More CO2 Than the Burning of Fossil Fuels

RETRACTED: Globally, Freshwater Ecosystems Emit More CO2 Than the Burning of Fossil Fuels

Carbon dioxide and methane emissions across tropical and subtropical inland water ecosystems in Brazil: meta-analysis of general patterns and potential drivers

Assessing the aquatic metabolic-balance response to future condition in a Mediterranean site: from an experimental-design perspective

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