Influence of hydrological factors on bacterial community structure in a tropical monsoonal estuary in India
| العنوان: | Influence of hydrological factors on bacterial community structure in a tropical monsoonal estuary in India |
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| المؤلفون: | Michela Catena, Nikhil Phadke, Vijayan Jasna, Ammini Parvathi, Nikhita Gogate |
| المصدر: | Environmental Science and Pollution Research. 28:50579-50592 |
| بيانات النشر: | Springer Science and Business Media LLC, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | geography, geography.geographical_feature_category, biology, Firmicutes, Ecology, Health, Toxicology and Mutagenesis, Community structure, Estuary, General Medicine, Euryhaline, 010501 environmental sciences, biology.organism_classification, 01 natural sciences, Pollution, Salinity, Gammaproteobacteria, Environmental Chemistry, Proteobacteria, Eutrophication, 0105 earth and related environmental sciences |
| الوصف: | In the present study, we analyzed variations in bacterial community structure along a salinity gradient in a tropical monsoonal estuary (Cochin estuary [CE]), on the southwest coast of India, using Illumina next-generation sequencing (NGS). Water samples were collected from eight different locations thrice a year to assess the variability in the bacterial community structure and to determine the physico-chemical factors influencing the bacterial diversity. Proteobacteria was the most dominant phyla in the estuary followed by Bacteroidetes, Cyanobacteria, Actinobacteria, and Firmicutes. Statistical analysis indicated significant variations in bacterial communities between freshwater and mesohaline and euryhaline regions, as well as between the monsoon (wet) and nonmonsoon (dry) periods. The abundance of Betaproteobacteria was higher in the freshwater regions, while Alphaproteobacteria and Epsilonproteobactera were more abundant in mesohaline and euryhaline regions of the estuary. Gammaproteobacteria was more abundant in regions with high nutrient concentrations. Various bacterial genera indicating the presence of fecal contamination and eutrophication were detected. Corrplot based on Pearson correlation analysis demonstrated the important physico-chemical variables (temperature, salinity, dissolved oxygen, and inorganic nutrients) that influence the distribution of dominant phyla, class, and genera. The observed spatio-temporal variations in bacterial community structure in the CE were governed by regional variations in anthropogenic inputs and seasonal variations in monsoonal rainfall and tidal influx. |
| تدمد: | 1614-7499 0944-1344 |
| DOI: | 10.1007/s11356-021-14263-0 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_________::573942979e80cc5c01d7fafab581c57e https://doi.org/10.1007/s11356-021-14263-0 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi...........573942979e80cc5c01d7fafab581c57e |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16147499 09441344 |
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| DOI: | 10.1007/s11356-021-14263-0 |