The influence of tide-brought nutrients on microbial carbon metabolic profiles of mangrove sediments

• Published in: The Science of the total environment 2024-01, Vol.906, p.167732-167732, Article 167732
• Main Authors: Li, Xinyang, Cheng, Xueyu, Cheng, Keke, Cai, Zhonghua, Feng, Shuying, Zhou, Jin
• Format: Article
• Language: English
• Subjects: Carbon cycle; Microbial profiles; Microecological function; Tidal-driven nutrient
• ISSN: 0048-9697; 1879-1026
• DOI: 10.1016/j.scitotenv.2023.167732

Mangrove ecosystems in the intertidal zone are continually affected by tidal inundation, but the impact of tidal-driven nutrient inputs upon bacterial communities and carbon metabolic features in mangrove surface sediments remains underexplored, and the differences in such impacts across backgrounds are not known. Here, two mangrove habitats with contrasting nutrient backgrounds in Shenzhen Bay and Daya Bay in Shenzhen City, China, respectively, were studied to investigate the effects of varying tidal nutrient inputs (especially dissolved inorganic nitrogen and PO43−-P) on bacterial community composition and functioning in sediment via field sampling, 16S rDNA amplicon sequencing, and the quantitative potential of microbial element cycling. Results showed that tidal input increased Shenzhen Bay mangrove's eutrophication level whereas it maintained the Daya Bay mangrove's relatively oligotrophic status. Dissolved inorganic nitrogen and PO43−-P levels in Shenzhen Bay were respectively 12.6–39.6 and 7.3–29.1 times higher than those in Daya Bay (p