Salinity and nutrient modulate soil bacterial communities in the coastal wetland of the Yellow River Delta, China

• Published in: Environmental science and pollution research international Vol. 28; no. 12; pp. 14621 - 14631
• Main Authors: Cheng, Qingli, Chang, Huiping, Yang, Xue, Wang, Ding, Wang, Wenlin
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.03.2021; Springer Nature B.V
• Subjects: Aquatic Pollution; Atmospheric Protection/Air Quality Control/Air Pollution; Bacilli; Bacteria; Bacteria - genetics; Chemical analysis; China; Coastal ecosystems; Coastal erosion; Deltas; Earth and Environmental Science; Ecosystem; Ecotoxicology; Environment; Environmental changes; Environmental Chemistry; Environmental Health; Environmental science; Estuaries; Humans; Intermodulation; Marine ecosystems; Nutrient availability; Nutrients; Redundancy; Research Article; Rivers; RNA, Ribosomal, 16S - genetics; rRNA 16S; Salinity; Salinity effects; Seawater; Soil; Soil erosion; Soil investigations; Soil microorganisms; Soils; Waste Water Technology; Water analysis; Water Management; Water Pollution Control; Wetlands; China; Yellow River; Salinization; Coastal wetland; The Yellow River Delta; Soil nutriture; Bacterial community
• ISSN: 0944-1344; 1614-7499
• DOI: 10.1007/s11356-020-11626-x

The Yellow River Delta is the largest and youngest estuarine and coastal wetland in China and is experiencing the most active interactions of seawater and freshwater in the world. Bacteria played multifaceted influence on soil biogeochemical processes, and it was necessary to investigate the intermodulation between the soil factors and bacterial communities. Soil samples were collected at sites with different salinity degree, vegetations, and interference. The sequences of bacilli were tested using 16S rRNA sequencing method and operational taxonomic units were classified with 97% similarity. The soil was highly salinized and oligotrophic, and the wetland was nitrogen-restricted. Redundancy analysis suggested that factors related with seawater erosion were principal to drive the changes of soil bacterial communities and then the nutrient level and human disturbance. A broader implication was that, in the early succession stages of the coastal ecosystem, seawater erosion was the key driver of the variations of marine oligotrophic bacterial communities, while the increasing nutrient availability may enhance in the abundance of the riverine copiotrophs in the late stages. This study provided new insights on the characteristics of soil bacterial communities in estuarine and coastal wetlands.