Microplastics modify the microbial-mediated carbon metabolism in mangroves

Mangroves, a major ecosystem for carbon sequestration, have been recently identified as a microplastic sink, yet the impact of microplastics on the mangrove microbial community is poorly known. Here, we investigated the metabolic activities of mangrove rhizosphere microbiome in the presence of polye...

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Bibliographic Details
Published in:Environmental chemistry letters 2024-06, Vol.22 (3), p.961-966
Main Authors: Xie, Huifeng, Li, Bingbing, Lu, Zifan, Liao, Zitang, Li, Dan, He, Lei, Dai, Zhenqing, Sun, Ruikun, Sun, Shengli, Li, Chengyong
Format: Article
Language:English
Subjects:
Activated carbon
Analytical Chemistry
Biological effects
Biotransformation
Carbon sequestration
Carbon sources
Cellulose
Chemistry
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Geochemistry
Mangroves
Metabolism
Microbial activity
Microbiomes
Microorganisms
Microplastics
Nitrogen
Nitrogen metabolism
Original Article
Plastic pollution
Pollution
Polyamide resins
Polyamides
Polyethylene
Polyethylenes
Polymers
Polystyrene
Polystyrene resins
Polyvinyl chloride
Rhizosphere
Rhizosphere microorganisms
Sediments
Wetlands
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Summary:Mangroves, a major ecosystem for carbon sequestration, have been recently identified as a microplastic sink, yet the impact of microplastics on the mangrove microbial community is poorly known. Here, we investigated the metabolic activities of mangrove rhizosphere microbiome in the presence of polyethylene, polystyrene, polyamide, and polyvinylchloride, in microcosms, using Biolog™ Ecoplates. Results show that microbial communities in mangrove sediment hold their functional diversity and comprehensive metabolic activity within 56 days of microplastic exposure. However, polyamide and polyvinylchloride microplastics induced a 59.6–66.7% reduction in the rhizosphere microbes’ utilization for their preferred polymer carbon sources. Microbes exposed to polyethylene microplastics showed an activated biotransformation for nitrogen-contained carbon sources. Polyethylene and polyamide microplastics caused a 20.1–22.4% loss available nitrogen. Overall, microplastics are altering the carbon and nitrogen metabolism activities of microbiomes in mangrove wetlands.
ISSN:1610-3653
1610-3661
DOI:10.1007/s10311-024-01704-8