scholarly journals The Toxicity Exerted by the Antibiotic Sulfadiazine on the Growth of Soil Bacterial Communities May Increase over Time

2020 ◽  
Vol 17 (23) ◽  
pp. 8773
Author(s):  
Vanesa Santás-Miguel ◽  
Laura Rodríguez-González ◽  
Avelino Núñez-Delgado ◽  
Montserrat Díaz-Raviña ◽  
Manuel Arias-Estévez ◽  
...  
Keyword(s):  
Bacterial Growth ◽  
Bacterial Communities ◽  
Agricultural Soils ◽  
Soil Samples ◽  
Short Term ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
First Time ◽  
Toxicity Effects

The toxicity exerted by the antibiotic sulfadiazine on the growth of soil bacterial communities was studied in two agricultural soils for a period of 100 days. In the short-term (2 days of incubation), the effect of sulfadiazine on bacterial growth was low (no inhibition or inhibition <32% for a dose of 2000 mg·kg−1). However, sulfadiazine toxicity increased with time, achieving values of 40% inhibition, affecting bacterial growth in both soils after 100 days of incubation. These results, which were here observed for the first time for any antibiotic in soil samples, suggest that long-term experiments would be required for performing an adequate antibiotics risk assessment, as short-term experiments may underestimate toxicity effects.

Effects of long-term biochar and biochar-based fertilizer application on brown earth soil bacterial communities

2021 ◽  
Vol 309 ◽  
pp. 107285
Author(s):  
Mengyu Gao ◽  
Jinfeng Yang ◽  
Chunmei Liu ◽  
Bowen Gu ◽  
Meng Han ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Fertilizer Application ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

scholarly journals The role of ecosystem engineers in shaping the diversity and function of arid soil bacterial communities

2020 ◽  
Author(s):  
Capucine Baubin ◽  
Arielle M. Farrell ◽  
Adam Šťovíček ◽  
Lusine Ghazaryan ◽  
Itamar Giladi ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Soil Samples ◽  
Ecosystem Engineers ◽  
Soil Microbiome ◽  
Desert Ecosystems ◽  
Arid Soil ◽  
Soil Bacterial Communities ◽  
Ant Nests ◽  
Soil Bacterial ◽  
And Function

ABSTRACTEcosystem engineers (EEs) are present in every environment and are known to strongly influence ecological processes and thus shape the distribution of species and resources. In this study, we assessed the direct and indirect effect of two EEs (perennial shrubs and ant nests), individually and combined, on the composition and function of arid soil bacterial communities. To that end, top soil samples were collected in the Negev Desert Highlands during the dry season from four patch types: (1) barren soil; (2) under shrubs; (3) near ant nests; or (4) near ant nests situated under shrubs. The bacterial composition was evaluated in the soil samples (fourteen replicates per patch type) using 16S rRNA gene amplicon sequencing, together with physico-chemical measures of the soil, and the potential functions of the community. We have found that the EEs differently affected the community composition. Indeed, barren patches supported a soil microbiome, dominated by Rubrobacter and Proteobacteria, while in EE patches the Deinococcus-Thermus phylum was dominating. The presence of the EEs similarly enhanced the abundance of phototrophic, nitrogen cycle and stress- related genes. In addition, only when both EEs were combined, were the soil characteristics altered. Our results imply that arid landscapes foster unique communities selected by each EE(s), solo or in combination, yet these communities have similar potential biological traits to persist under the harsh arid conditions. Environments with multiple EEs are complicated to study due to the possibility of non-additive effects of EEs and thus further research should be done.IMPORTANCEEcosystem engineers are organisms that can create, modify, or maintain their habitat. They are present in various environments but are particularly conspicuous in desert ecosystems, where their presence is tightly linked to vital resources like water or nutrients. Despite their key role in structuring and controlling desert ecosystems, joint engineering, and their effect on soil function, are unknown. Our study explores the contributions of key ecosystem engineers to the diversity and function of their soil microbiome allowing better understanding of their role in shaping habitats and engineering their activity

scholarly journals Plant and soil fungal but not soil bacterial communities are linked in long-term fertilized grassland

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Noriko A. Cassman ◽  
Marcio F. A. Leite ◽  
Yao Pan ◽  
Mattias de Hollander ◽  
Johannes A. van Veen ◽  
...  
Keyword(s):  
Bacterial Communities ◽  
Soil Bacterial Communities ◽  
Soil Bacterial

scholarly journals Understanding the Responses of Soil Bacterial Communities to Long-Term Fertilization Regimes Using DNA and RNA Sequencing

Agronomy ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 2425
Author(s):  
Juan Li ◽  
Yanchen Wen ◽  
Xiangdong Yang
Keyword(s):  
16S Rrna ◽  
Bacterial Communities ◽  
Alkaline Soil ◽  
Soil Dna ◽  
Olsen P ◽  
Soil Bacterial Communities ◽  
Dna And Rna ◽  
Relative Abundances ◽  
Soil Bacterial

Studies of soil DNA-based and RNA-based bacterial communities under contrasting long-term fertilization regimes can provide valuable insights into how agricultural management affects soil microbial structure and functional diversity. In this study, soil bacterial communities subjected to six fertility treatments in an alkaline soil over 27 years were investigated by 454 pyrosequencing based on 16S rDNA and 16S rRNA. Long-term fertilization showed significant influences on the diversity of the soil DNA-based bacteria, as well as on their RNA-based members. The top five phyla (Proteobacteria, Acidobacteria, Chloroflexi, Actinobacteria, and Planctomycetes) were found in both the DNA- and RNA-based samples. However, the relative abundances of these phyla at both DNA and RNA levels were showed significantly different. Analysis results showed that the diversity of the 16S rRNA samples was consistently lower than that of the rDNA samples, however, 16S rRNA samples had higher relative abundance. PICRUSt analysis indicated that glycan biosynthesis and metabolism were detected mainly in the DNA samples, while metabolism and degradation of xenobiotics and the metabolism of amino acids, terpenoids and polyketides were relatively higher in the RNA samples. Bacilli were significantly more abundant in all the OM-fertilized soils. Redundancy analysis indicated that the relative abundances of both DNA- and RNA-based bacterial groups were correlated with soil total organic carbon content, nitrogen content, Olsen-P, and soil pH. Moreover, the RNA-based Bacilli were positively correlated with available phosphorus (Olsen-P).

Variation in soil bacterial communities by long-term application of organic and inorganic fertilizers in rice

2019 ◽  
Vol 11 (3) ◽  
Author(s):  
Ashwini Shanthpure ◽  
Devaki Girija ◽  
Panchami Pottekkat Sidharthan ◽  
Moossa Puthen Peedikakkal ◽  
Sneha Sasidharan Nair
Keyword(s):  
Bacterial Communities ◽  
Inorganic Fertilizers ◽  
Soil Bacterial Communities ◽  
Soil Bacterial ◽  
Organic And Inorganic Fertilizers
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