Potential contribution of chlorella vulgaris to carbon–nitrogen turnover in freshwater ecosystems after a great sandstorm event

Hou, Zelin; Zhou, Qixing; Xie, Yingying; Mo, Fan; Kang, Weilu; Wang, Qi

doi:10.1016/j.envres.2023.116569

Cited by 3 publications

(1 citation statement)

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“…Total organic carbon (TOC) and dissolved organic carbon (DOC) and dissolved nitrogen (DN) were determined using a Total Organic Carbon/Total Nitrogen Analyzer (Multi N/C 3100, Analytik Jena AG, Germany). NH 4+ and NO 3– were measured using Nessler’s reagent spectrophotometry . The soil inorganic carbon (IC) content was then calculated by subtracting the TOC content from the TC content.…”

Section: Materials and Methodsmentioning

confidence: 99%

Key Role of Vegetation Cover in Alleviating Microplastic-Enhanced Carbon Emissions

Hou,

Mo,

Zhou

et al. 2024

Environ. Sci. Technol.

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Microplastics (MPs) are considered to influence fundamental biogeochemical processes, but the effects of plant residue-MP interactions on soil carbon turnover in urban greenspaces are virtually unknown. Here, an 84-day incubation experiment was constructed using four types of single-vegetationcovered soils (6 years), showing that polystyrene MP (PSMP) pollution caused an unexpectedly large increase in soil CO 2 emissions. The additional CO 2 originating from highly bioavailable active dissolved organic matter molecules (<380 °C, predominantly polysaccharides) was converted from persistent carbon (380−650 °C, predominantly aromatic compounds) rather than PSMP derivatives. However, the priming effect of PSMP derivatives was weakened in plant-driven soils (resistivity: shrub > tree > grass). This can be explained from two perspectives: (1) Plant residue-driven humification processes reduced the percentage of bioavailable active dissolved organic matter derived from the priming effects of PSMPs. (2) Plant residues accelerated bacterial community succession (dominated by plant residue types) but slowed fungal community demise (retained carbon turnover-related functional taxa), enabling specific enrichment of glycolysis, the citric acid cycle and the pentose phosphate pathway. These results provide a necessary theoretical basis to understand the role of plant residues in reducing PSMP harm at the ecological level and refresh knowledge about the importance of biodiversity for ecosystem stability.

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Section: Materials and Methodsmentioning

confidence: 99%