Factors Regulating the Potential for Freshwater Mineral Soil Wetlands to Function as Natural Climate Solutions

Wetlands, Год журнала: 2025, Номер 45(1)

Опубликована: Янв. 1, 2025

There are increasing global efforts and initiatives aiming to tackle climate change mitigate its impacts via natural solutions (NCS). Wetlands have been considered effective NCS given their capacity sequester retain atmospheric carbon dioxide (CO

Язык: Английский

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Freshwater macrophyte type (macroalgae versus phanerogams) mainly determines detritus-derived greenhouse gases production: A microcosm experiment

Journal of Environmental Sciences, Год журнала: 2025, Номер unknown

Опубликована: Янв. 1, 2025

Язык: Английский

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Submersed Macrophyte Density Regulates Aquatic Greenhouse Gas Emissions

Journal of Geophysical Research Biogeosciences, Год журнала: 2023, Номер 128(10)

Опубликована: Окт. 1, 2023

Abstract Shallow freshwater ecosystems emit large amounts of greenhouse gases (GHGs), such as carbon dioxide (CO 2 ) and methane (CH 4 ), yet emissions are highly variable. The role that aquatic macrophytes play in regulating GHG is uncertain despite their ability to dominate shallow waterbodies. Here, we studied the effects submersed macrophyte ( Ceratophyllum demersum density on CO CH concentrations fluxes. We conducted a 61‐days experiment using mesocosms containing one following C . treatments: 0, 10, 20, or 30 individual shoots n = 3). found high had highest surface water while there was no significant difference low medium densities plant control. treatment lost biomass over course experiment, indicating die‐off additions organic matter sediment. High loading dissolved oxygen likely stimulated production treatment. Our results emphasize periods growth dieback important emissions, which may help explain why waterbodies variable sources GHGs atmosphere.

Язык: Английский

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Immediate Effect of Floating Solar Energy Deployment on Greenhouse Gas Dynamics in Ponds

Environmental Science & Technology, Год журнала: 2024, Номер unknown

Опубликована: Дек. 6, 2024

Floating photovoltaic (FPV) solar energy offers promise for renewable electricity production that spares land other societal benefits. FPV deployment may alter greenhouse gas (GHG) and emissions from waterbodies by changing physical, chemical, biological processes, which can have implications the carbon cost of with FPV. Here, we use an ecosystem-scale experiment to assess how GHG dynamics in ponds respond installation operationally representative Following deployments 70% array coverage, daily whole-pond increased 26.8% on a dioxide-equivalent (CO2-eq) basis, dissolved oxygen availability rapidly decreased. Despite following deployment, FPV-derived are likely lower than landscape associated terrestrial hydropower CO2-eq kWh–1 basis. Adaptive management strategies like bubbler reduce magnitude impacts dynamics.

Язык: Английский

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Dissolved inorganic carbon input significantly lowers carbon dioxide flux but not methane flux in shallow macrophyte-dominated systems with positive effects on carbon stocks

BMC Plant Biology, Год журнала: 2025, Номер 25(1)

Опубликована: Май 10, 2025

With the increase in inorganic carbon input from watersheds, elevated dissolved (DIC) concentrations will significantly impact cycle freshwater ecosystems. Moreover, limited diffusion rate of CO2 water, coupled with lack functional stomata, greatly restricts ability submerged macrophytes to absorb their aquatic environment. The importance bicarbonate (HCO3-) for becomes more pronounced. Current research focuses on effects DIC (notably HCO3-) phenotypic plasticity macrophytes, while its stock capabilities has rarely been reported. In this study, Myriophyllum spicatum served as model macrophyte within a mesocosm experimental system assess HCO3- enrichment (0.5 2.5 mmol L-1) stocks and emissions across one-year period. Our findings indicated that addition had non-significant inhibitory effect diffusive fluxes methane (CH4) emissions. Concurrently, it reduced systems. annual average four levels were -3.48 ± 7.60, -6.78 5.87, -7.15 8.68, -14.04 14.39 mol m-2 yr-1, respectively, showing significant differences between low /medium- high- levels. enhanced entire system, minimal sedimentation stocks. study provides valuable insights into understanding sink capacity ecosystems elucidates underlying mechanisms driving these processes scale.

Язык: Английский

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Vascular macrophytes versus charophytes: how the macrophyte type and warming affect the sediment microbial community and the production of greenhouse gases

Journal of Environmental Management, Год журнала: 2025, Номер 386, С. 125654 - 125654

Опубликована: Май 11, 2025

In the global warming context, adaptive management strategies involve conservation and restoration of inland waters by planning reintroduction macrophytes to substantially mitigate greenhouse gas emissions (GHG). The selection appropriate species is crucial. We studied influence two submerged macrophyte on GHG production, sediment-oxygen microprofiles, microbial community composition under thermal regimes means a microcosm experiment. chose phanerogam Myriophyllum spicatum, more typical meso-eutrophic habitats, charophyte Chara hispida, frequent in oligotrophic belonging much less group, which, moreover, exhibit contrasting functional traits (i.e., roots versus rhizoids). presence both types considerably reduced diurnal diffusive CO2 due their photosynthetic activity compared bare-sediment situations. radial oxygen loss M. spicatum provided aerobic-microaerobic conditions beyond first sediment centimeter, contrast anoxic sediments created C. hispida. As result this, each type determined particular microbiome. Despite dissolved CH4 being greater plants, no statistical differences flux caused or absence plants was found. demonstrated how presence, not, important than (in our case with temperature difference 3 °C) relation emissions. Both species, perennial, provide ecosystem services year-round are strong candidates for aimed at transforming new restored aquatic ecosystems into carbon sinks.

Язык: Английский

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Resolving the environmental factors that determine pond thermal refuge quality

Limnology and Oceanography Letters, Год журнала: 2025, Номер unknown

Опубликована: Май 20, 2025

Abstract Cold thermal refuges may mitigate detrimental effects of future climate warming; yet, pond ecosystems have been largely omitted from refuge research despite being globally numerous and providing critical ecosystem services. We create a formal definition for quality, then operationalize this by measuring the characteristics environmental attributes ponds near Mount St. Helens (Washington, USA) to determine features that promote or hinder refuges. Our results reveal substantial variation in quality between indicate within‐pond are distinct metric surface temperature. Denser floating vegetation promoted during summer conditions, while vegetation, water clarity, canopy cover were associated with reduced mean temperatures heatwave conditions. These findings help identify high conservation value suggest actionable steps heightening

Язык: Английский

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Freshwater Biogeochemical Hotspots: High Primary Production and Ecosystem Respiration in Shallow Waterbodies

Geophysical Research Letters, Год журнала: 2024, Номер 51(15)

Опубликована: Июль 30, 2024

Abstract Ponds, wetlands, and shallow lakes (collectively “shallow waterbodies”) are among the most biogeochemically active freshwater ecosystems. Measurements of gross primary production (GPP), respiration (R), net ecosystem (NEP) rare in waterbodies compared to larger deeper lakes, which can bias our understanding lentic processes. In this study, we calculated GPP, R, NEP 26 small, across temperate North America Europe. We observed high rates GPP (mean 8.4 g O 2 m −3 d −1 ) R −9.1 ), while varied from heterotrophic autotrophic. Metabolism were affected by depth aquatic vegetation cover, shallowest had highest variable NEP. The study considerably higher metabolism stressing importance these systems as highly productive biogeochemical hotspots.

Язык: Английский

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High carbon to nitrogen ratio linked to significant diffusive methane emissions from aquaculture area of a subtropical shallow lake

Agriculture Ecosystems & Environment, Год журнала: 2024, Номер 380, С. 109404 - 109404

Опубликована: Ноя. 27, 2024

Язык: Английский

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Net Methane Production Predicted by Patch Characteristics in a Freshwater Wetland

Journal of Geophysical Research Biogeosciences, Год журнала: 2023, Номер 129(1)

Опубликована: Дек. 27, 2023

Abstract Methane (CH 4 ) dynamics in wetlands are spatially variable and difficult to estimate at ecosystem scales. Patches with different plant functional types (PFT) represent discrete units within that may help characterize patterns CH variability. We investigate dissolved porewater concentrations, a representation of net production potential source atmospheric flux, five wetland patches characterized by dominant PFT or lack plants. Using soil, porewater, variables we hypothesized influence , used three modeling approaches—Classification regression tree, AIC model selection, Structural Equation Modeling—to identify direct indirect influences on dynamics. Across all models, CO 2 concentration was the driver partly through patches. Plants each patch type likely had via root exudates (a substrate for methanogens), capacity transport gas (both O from atmosphere), litter quality which impacted soil respiration porewater. attribute importance methanogenic pathway identified, uses as terminal electron acceptor. propose mechanistic relationship between which, when combined sources loss including methanotrophy, oxidation, plant‐mediated transport, can provide patch‐scale estimates flux. Combining these distribution PFTs improve flux heterogenous global budgets.

Язык: Английский

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