Investigation of the formation and variability of dissolved inorganic carbon and dissolved organic carbon in the water of a small river (on the example of the Styr River, Ukraine)

Environmental Monitoring and Assessment, Год журнала: 2024, Номер 196(11)

Опубликована: Окт. 28, 2024

Язык: Английский

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Role of hydraulic residence time in shaping phytoplankton community assembly in the upper yellow river cascade reservoirs

Frontiers in Environmental Science, Год журнала: 2025, Номер 13

Опубликована: Апрель 9, 2025

Introduction: Cascade hydropower development significantly alters the structure and function of river ecosystems. Phytoplankton, as primary producers, are highly sensitive to environmental changes, their diversity community reflect state water environment. While there is extensive research on how changes in environments affect phytoplankton structure, studies spatial distribution patterns assembly mechanisms relation hydraulic residence time (HRT)—a key characteristic reservoirs—are limited. Methods: Linear regression analysis was used examine relationship between communities HRT. Additionally, Neutral Community Model (NCM) combined with Modified Stochasticity Ratio (MST) employed reveal types these cascade reservoirs. Finally, Mantel tests stepwise assessed specific impacts factors communities. Results: In ecosystem Yellow River reservoirs, HRT positively correlated abundance across different seasons. annual regulation stations (LJX LYX), species richness, abundance, indices higher compared those runoff stations. Discussion: The primarily driven by deterministic processes, station being more influenced processes than station. HRT, temperature (WT), total nitrogen (TN) most significant affecting structural differences There a positive correlation temperature, especially short where impacted temperature.

Язык: Английский

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High sensitivity of dissolved organic carbon transport during hydrological events in a small subtropical karst catchment

The Science of The Total Environment, Год журнала: 2024, Номер 946, С. 174090 - 174090

Опубликована: Июнь 22, 2024

Язык: Английский

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Elevated nitrogen loadings facilitate carbon dioxide emissions from urban inland waters

Journal of Environmental Management, Год журнала: 2024, Номер 361, С. 121268 - 121268

Опубликована: Май 30, 2024

Язык: Английский

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Production Mechanism and Emissions of CO₂ in Water Networks of an Agricultural Watershed during Drainage Period

ACS Earth and Space Chemistry, Год журнала: 2024, Номер 8(7), С. 1460 - 1469

Опубликована: Июль 3, 2024

Growing evidence shows that water networks in agricultural watersheds, including rivers, paddy fields (PFs), and ditches (DCs), are hotspots of aquatic greenhouse gas emissions globally. However, the knowledge role natural processes anthropogenic activities, practices, promoting CO2 production still remains unclear. In this study, sampling analysis different surface waters during drainage period were conducted to clarify mechanism emission CO2. The results showed all Nongjiang River (NJR) watershed acted as sources with respect atmospheric CO2, while a few Honghe Wetland estuary sinks. Longitudinal variations mainstreams NJR indicated fertilizer application, manure, sewage discharges stimulated production, those Yalu (YLR) mainly affected by wetlands. accumulation carbon nitrogen PF DC have enhanced periods. high ratio ΔCO2/ΔO2 revealed important extensive respiration NJR. Furthermore, correlation between dissolved oxygen demonstrated photosynthesis dominated consumption types bodies. This study implied might be vague for systems, effort is urgently needed quantitatively assess context wetland–farmland shifts regionally worldwide.

Язык: Английский

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Investigation of the formation and variability of dissolved inorganic carbon and dissolved organic carbon in the water of a small river (on the example of the Styr River, Ukraine)

Research Square (Research Square), Год журнала: 2024, Номер unknown

Опубликована: Июль 11, 2024

This paper presents the results of a study on dynamics in concentrations dissolved inorganic carbon (DIC) and organic (DOC) water samples collected from Styr River between 2019 2022. The DIC DOC were measured using an Elementar liqui TOC II analyzer. methodology involved analyzing changes their relationship with flow rates, temperature, seasonality, other indicators such as hydrogen pH levels, total alkalinity (TA), solids (TDS). purpose this article is to identify patterns formation River. ranged 1.55-4.93 mM 0.49-1.43 mM, respectively, accounting for average 22% content. highest observed summer, while winter. Based results, it can be concluded that temperature have impact concentration, flow, affect concentration. There was no correlation concentrations, but strong positive (r=0.9056, p<0.001) found TA concentrations. Therefore, main factors influencing are those carbonate equilibrium, leaching silicate rocks, CO2 absorption atmosphere, pH. Additionally, concentration influenced by biological activity higher during warm season. These findings used develop strategy managing resources basin assess predict ecological state river.

Язык: Английский

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Groundwater-derived carbon stimulates headwater stream CO2 emission potential on the Qinghai-Tibet Plateau

Water Research, Год журнала: 2024, Номер 268, С. 122684 - 122684

Опубликована: Окт. 24, 2024

Язык: Английский

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Permafrost impacts on chemical weathering and CO2 budgets in the Tibetan Plateau: Micro-watershed perspective on a headwater catchment

CATENA, Год журнала: 2024, Номер 247, С. 108479 - 108479

Опубликована: Окт. 25, 2024

Язык: Английский

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Carbon transfer from land to fluvial networks in a typical karst river-reservoir system

Water Research, Год журнала: 2024, Номер 271, С. 122899 - 122899

Опубликована: Дек. 1, 2024

Язык: Английский

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