Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 562281
Title Pesticides decrease bacterial diversity and abundance of irrigated rice fields
Author(s) Onwona‐Kwakye, Michael; Plants‐paris, Kimberly; Keita, Kadiatou; Lee, Jessica; Brink, Paul J. van den; Hogarh, Jonathan N.; Darkoh, Charles
Source Microorganisms 8 (2020)3. - ISSN 2076-2607
DOI https://doi.org/10.3390/microorganisms8030318
Department(s) Aquatic Ecology and Water Quality Management
WIMEK
Environmental Risk Assessment
Publication type Refereed Article in a scientific journal
Publication year 2020
Keyword(s) Irrigated fields - Pesticides - Pesticides and bacteria - Soil bacteria - Soil microbiota and diversity
Abstract

Bacteria play an important role in soil ecosystems and their activities are crucial in nutrient composition and recycling. Pesticides are extensively used in agriculture to control pests and improve yield. However, increased use of pesticides on agricultural lands results in soil contamination, which could have adverse effect on its bacterial communities. Here, we investigated the effect of pesticides commonly used on irrigated rice fields on bacterial abundance and diversity. Irrigated soil samples collected from unexposed, pesticide‐exposed, and residual exposure areas were cultured under aerobic and anaerobic conditions. DNA was extracted and analysed by 16S rRNA sequencing. The results showed overall decrease in bacterial abundance and diversity in areas exposed to pesticides. Operational taxonomic units of the genera Enterobacter, Aeromonas, Comamonas, Stenotrophomonas, Bordetella, and Staphylococcus decreased in areas exposed to pesticides. Conversely, Domibacillus, Acinetobacter, Pseudomonas, and Bacillus increased in abundance in pesticide‐exposed areas. Simpson and Shannon diversity indices and canonical correspondence analysis demonstrated a decrease in bacterial diversity and composition in areas exposed to pesticides. These results suggest bacteria genera unaffected by pesticides that could be further evaluated to identify species for bioremediation. Moreover, there is a need for alternative ways of improving agricultural productivity and to educate farmers to adopt innovative integrated pest management strategies to reduce deleterious impacts of pesticides on soil ecosystems.

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