Analytical methods, molecular structures and biogeochemical behaviors of dissolved black carbon

Carbon Research, Год журнала: 2022, Номер 1(1)

Опубликована: Ноя. 2, 2022

Abstract Dissolved black carbon (DBC) is one of the most active fractions in (BC) continuum and plays a significant role global dissolved organic matter (DOM) pool. Connecting BC pool between territorial marine environments, biogeochemical processes DBC are for many aspects aquatic chemistry. Once entering environment, will undergo degradation exert continuing effects on water ecology. can change migration transport pollutants affect associated microbial communities. Therefore, knowledge fate great importance. In this work, molecular structures different were examined summarized to provide basis understanding environmental DBC. Current research progress photodegradation DBC, interactions microorganisms, contaminants critically reviewed. The qualitative quantitative analytical methods assessed detail. To date, behaviors far from fully understood part due lack systematic methods. Compared with relatively well-studied transformation poorly understood. Moreover, exposed continuous light illumination metabolization, thus combined biodegradation crucial cycling turnover environment deserve further investigations. addition, sorption processes, redox reactions DBC-assisted photo-transformations still at its emerging stages.

Язык: Английский

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Increased microbial and substrate complexity result in higher molecular diversity of the dissolved organic matter pool

Limnology and Oceanography, Год журнала: 2022, Номер 67(11), С. 2360 - 2373

Опубликована: Авг. 27, 2022

Abstract Marine dissolved organic matter (DOM) represents one of the largest reduced carbon pools on Earth. Diverse microbial metabolic activities play important roles in shaping this pool. However, links between changing DOM substrates and communities its influence produced remain poorly understood. In study, we investigated how addition with different complexity (glucose, laminarin, Synechococcus ‐derived DOM) impacted production new by an individual opportunist Alteromonas strain a coastal natural community. Our experiments reveal that was more than substrate molecular composition DOM. Furthermore, our results showed played larger role compositions concentrations inorganic nutrients. Combined network analysis revealed complex resulted higher diversity DOM, sustained diversity, maintained diverse association molecules. Overall, present study indicate contributes to vice versa, highlighting importance microbial–substrate interactions marine

Язык: Английский

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Urban and agricultural land use regulates the molecular composition and bio-lability of fluvial dissolved organic matter in human-impacted southeastern China

Carbon Research, Год журнала: 2022, Номер 1(1)

Опубликована: Сен. 26, 2022

Abstract Urbanization and agricultural land use can increase the transport of nutrients to fluvial ecosystems; yet, overall impact urban nonpoint inputs on composition, bio-lability, fate dissolved organic matter (DOM) remains poorly understood. We investigated optical molecular composition bio-lability DOM in 76 streams rivers with varying sizes catchment area (1 ~ 4850 km 2 ) along large gradients use. Optical spectroscopy Fourier transform ion cyclotron mass spectrometry (FT-ICR MS) were used determine chemical DOM, laboratory bio-incubations assess bio-lability. found that intensification was associated reduced relative contribution from pristine soils, enriched carbon (DOC), higher contributions aliphatic peptide-like as well enrichment N- S-containing formulae. Specifically, FT-ICR MS revealed abundance CHO-containing formulae decreased while CHOS-containing increased increasing bio-availability draining urbanized landscapes related aromaticity proportions energy-rich Our results suggested catchments significantly altered potential effects ecosystem metabolism downstream-linked rivers. Anthropogenic disturbances may thus boost microbial processing carbon, including uptake, retention, outgassing impacted ecosystems. Graphical

Язык: Английский

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Dominant role of rare bacterial taxa rather than abundant taxa in driving the tailing primary succession

Journal of Hazardous Materials, Год журнала: 2023, Номер 462, С. 132807 - 132807

Опубликована: Окт. 18, 2023

Язык: Английский

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The evolution of a typical plateau lake from macrophyte to algae leads to the imbalance of nutrient retention

Water Research, Год журнала: 2023, Номер 236, С. 119937 - 119937

Опубликована: Апрель 6, 2023

Язык: Английский

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