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- W4313547511 endingPage "161368" @default.
- W4313547511 startingPage "161368" @default.
- W4313547511 abstract "Seawater intrusion is a global coastal environmental issue of great concern and significantly impacts the regional biogeochemical environment and material cycles, including nitrogen cycling. To reveal the mechanism of seawater intrusion altering nitrogen cycling patterns through hydrodynamic behavior and biochemical reactions, the Bayesian mixing model (δ15N-NO3- and δ18O-NO3-) and 16S rDNA gene amplicon sequencing are used to establish nitrogen cycling pathways and microbial functional network. The results show that the nitrate in the coastal groundwater is from manure and septic waste (M&S, over 44 %), soil organic nitrogen (SON, over 20 %), and nitrogen fertilizer (FN, over 16 %). The hydrological interaction has promoted the coupling between material cycling and microbial community in the coastal groundwater systems. Among them, precipitation infiltration has caused the gradual decrease of specific microbes along the flow direction, such as Lactobacillus, Acinetobacter, Bifidobacterium, etc. And seawater intrusion has caused the mutations of specific microbes (Planktomarina, Clade_Ia, Wenyingzhuangia, Glaciecola, etc.) and convergence of microbial community at the salt-freshwater interface in the aquifer. In the coastal intruded aquifer systems, the nitrogen cycling pattern can be divided into oxidation and reduction processes. The oxidation process involves the enhancement of nitrification while the weakening of denitrification and anammox with the increase of aquifer depth. The reduction process consists of the enhancement of denitrification and anammox while the erosion of nitrification and ammonification with increased seawater intrusion. In addition, seawater intrusion can mitigate nitrate contamination by promoting denitrification and anammox in coastal areas." @default.
- W4313547511 created "2023-01-06" @default.
- W4313547511 creator A5011355525 @default.
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- W4313547511 creator A5028675458 @default.
- W4313547511 creator A5036442264 @default.
- W4313547511 creator A5078514263 @default.
- W4313547511 date "2023-04-01" @default.
- W4313547511 modified "2023-09-27" @default.
- W4313547511 title "Seawater intrusion alters nitrogen cycling patterns through hydrodynamic behavior and biochemical reactions: Based on Bayesian isotope mixing model and microbial functional network" @default.
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- W4313547511 doi "https://doi.org/10.1016/j.scitotenv.2022.161368" @default.
- W4313547511 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36621512" @default.
- W4313547511 hasPublicationYear "2023" @default.
- W4313547511 type Work @default.