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Nutrient enrichment drives the sediment microbial communities in Chinese mitten crab Eriocheir sinensis culture. | LitMetric

Nutrient enrichment drives the sediment microbial communities in Chinese mitten crab Eriocheir sinensis culture.

Environ Res

State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing, 210008, China. Electronic address:

Published: April 2023

AI Article Synopsis

  • Microbial communities are essential for aquaculture ecosystems, and their diversity and composition can vary due to sediment nutrient levels in culture ponds for Chinese mitten crabs.
  • The study collected sediment and water samples to analyze bacterial communities using 16S rRNA gene sequencing, finding that Proteobacteria was the most abundant phylum among others.
  • Key factors such as total nitrogen, organic matter, and pH significantly influence the bacterial community structure, with total nitrogen accounting for a large portion of the variation, suggesting that nutrient enrichment can impact the efficiency of aquaculture.

Article Abstract

Microbial communities play a critical role in aquaculture ecosystems. To identify the influence of sediment nutrient levels on microbial communities, sediment and water samples were collected from Chinese mitten crab Eriocheir sinensis culture ponds with different nutrient enrichment levels. Relevant physicochemical properties were measured, and 16 S rRNA gene sequencing was applied to identify relevant bacterial communities in the sediments. The results showed that the diversity and composition of microbial communities in sediments with different levels of nutrient enrichment varied considerably. Proteobacteria was the most abundant phylum in all samples, followed by Bacteroidetes, and Desulfobacterota with relative abundances of 23.5-40.9%, 9.8-21.5%, and 9.6-18.1%, respectively. Notably, total nitrogen (TN), organic matter (OM), and pH were important factors driving sediment bacterial community aggregation, the TN concentration explaining 61.5% of the microbial community variation. This study highlights that long-term culture activities alter the degree of sediment nutrient enrichment, which in turn affects microbial community composition and may ultimately have an impact on culture efficiency.

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Source
http://dx.doi.org/10.1016/j.envres.2023.115281DOI Listing

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