Nitrogen and Phosphorus‑Related Functional Genes Enhance Nutrient Removal in the Integrated Aquaculture Wastewater Bioremediation System in the Presence of Photosynthetic Bacteria
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Date
2025
Journal Title
Journal ISSN
Volume Title
Publisher
Springer nature
Abstract
Integrated Aquaculture Wastewater Bioremediation Systems (IAWBSs) are crucial for
treating nutrient-rich mariculture water. However, there is a lack of detailed information
about the functional mechanisms between nitrogen (N) and phosphorus (P) functional
genes and the bacterioplankton community in the presence of photosynthetic bacteria
(PSB). This study evaluated the connections between N and P functional genes in IAWBSs
under the influence of PSB. The results showed significant improvements in effluent qual-
ity, with removal efficiencies of 79, 74, 83, 90, and 71% for NO2− −N, NO3−
−N, PO43−-P,
NH 4+
−N, and COD Mn, respectively. Adding PSB enhanced and altered microbial diversity
within the system, promoting the abundance of functional genes related to N and P cycling.
Notably, genes associated in denitrification (nirK and nirS), ammonification (ureC) and
amoB, involved in nitrification, were significantly increased after PSB was added. Fur-
thermore, genes such as phnK, phoD, and phoX, which are involved in P transformation,
also showed increased abundance levels. These genes were closely linked to the micro-
bial community distribution, species diversity, and nutrient cycling. Microbial community
changes can result in changes in functional gene abundance. This study provides important
and novel insights for developing bioremediation strategies for polluted sites. This demon-
strates the fundamental relationships between the IAWBSs’ functional units and the distri-
bution of microbial communities under the influence of PSB.
Description
This research article was published by springer nature in 2025