AUTHOR=Zheng Fuchao , Zhang Tiange , Yin Shenglai , Qin Ge , Chen Jun , Zhang Jinghua , Zhao Dehua , Leng Xin , An Shuqing , Xia Lu 

TITLE=Comparison and interpretation of freshwater bacterial structure and interactions with organic to nutrient imbalances in restored wetlands

JOURNAL=Frontiers in Microbiology

VOLUME=Volume 13 - 2022

YEAR=2022

URL=https://www.frontiersin.org/journals/microbiology/articles/10.3389/fmicb.2022.946537

DOI=10.3389/fmicb.2022.946537

ISSN=1664-302X

ABSTRACT=Chemical oxygen demand to nitrogen (COD/N) and nitrogen to phosphorus (N/P) ratios have distinct effects on bacterial community structure and interaction. However, how nutritional imbalances affect the dynamics of freshwater bacterial assemblages in restored wetlands remains poor understood. Here, the composition and dominant taxa of bacterial assemblages in four wetlands (low COD/N and high N/P (LH), low COD/N and low N/P (LL), high COD/N and high N/P (HH) and high COD/N and low N/P (HL)) were investigated. High COD/N siginificantly increased bacterial diversity, and more than 80% of the dominant taxa were obviously affected by variation in COD/N and N/P. The distribution of bacterial assemblages was mostly driven by variations in ammonia nitrogen (NH4+-N) and electrical conductivity (EC), which collectively explained more than 80% of the variation concerning bacterial assemblages. The cooccurrence network indicated that LH promoted bacterial network compactness and bacterial interaction consolidation. The relationships between nutritional imbalances and bacterial assemblages may provide a theoretical basis for the empirical management of wetland ecosystems.