Soil microbial diversity of peri-urban agricultural field and riverbank along Yamuna river in Delhi, India

Abstract

Soil microbes play an important role in the earth's ecosystem; variations in any environmental factor would have a great impact on microbial function and diversity. Yamuna river is regarded as one of the most polluted rivers in India. It is a major source of water for household and agricultural practices in Delhi and its national capital territory regions. In the present work, we studied the physic-chemical properties and soil microbial diversity in riverbanks and agricultural field along the Yamuna river. Physicochemical properties indicate the soil quality of the two distinct soil sites and correlation analysis showed that these are the key factors responsible for shift in soil bacterial community. Characterization of soil microbial community was done. Sequence analysis showed that both riverbank soil and field soil harbor microbial community with variation in their relative abundance. Proteobacteria is the dominating bacterial community in both riverbanks (70.03%) and agricultural field soil (56.41%) while Bacteroidetes (38.39%) in riverbank soil and Actinobacteria (11.3%) in agricultural field soil. Field soil also harbors some specific group of bacteria, i.e., Actinomycetes and Cyanobacteria. Bioinformatics and statistical analysis showed that bacterial community was found to be significantly different in two soil environments and mainly driven by climatic conditions and concentration of pollutant. Our work provides insight into soil quality, microbial community, and phylogenetic turnover under different soil conditions in polluted areas.

Diversity of soil bacteria in some sacred patches of Purba Bardhaman District, West Bengal, India

“…The study on the nutrient status of soil samples from some sacred patches of Maharashtra by Sathe et al (2018) is also worth mentioning. However, similar studies on soil microbial diversity from different areas, other than sacred patches, include those by Das et al (2013), Radhakrishnan and Varadharajan (2016), Azmi and Chatterjee (2016), Sharma et al (2019); The viable plate count method was applied to study the bacterial diversity of the soil samples in the current investigation. The aerobic heterotrophic bacterial population from the sacred patches were quite high which indicates high composition of organic matters in the soil.…”

Passion fruit plants alter the soil microbial community with continuous cropping and improve plant disease resistance by recruiting beneficial microorganisms

“…Approximately 10–15 cm of topsoil was removed before sampling in the CS and NCS. According to the S-shaped five-point sampling method, soil sampling was performed at five points and mixed as one composite sample in each plot [ 22 , 23 ]. Due to the smooth root surface and poor soil adhesion, the whole plants of RP and RY were dug up.…”

Multi-metal resistance and potential of Alcaligenes sp. MMA for the removal of heavy metals

“…The rapid surge in the population, accompanied by the industrialization has led to river pollution. Although the heavy metals act as enzyme cofactors, most of them are toxic at low concentrations [35].…”