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• W2987442885 abstract "The effect of nutrients on microbial interactions, including competition and collaboration, has mainly been studied in laboratories, but their potential application to complex ecosystems is unknown. Here, we examined the effect of changes in organic acids among other parameters on snow microbial communities in situ over two months. We compared snow bacterial communities from a low organic acid content period to that from a higher organic acid period. We hypothesized that an increase in organic acids would shift the dominant microbial interaction from collaboration to competition. To evaluate microbial interactions, we built taxonomic co-variance networks from OTUs obtained from 16S rRNA gene sequencing. In addition, we tracked marker genes of microbial cooperation (plasmid backbone genes) and competition (antibiotic resistance genes) across both sampling periods in metagenomes and metatranscriptomes. Our results showed a decrease in the average connectivity of the network during late spring compared to the early spring that we interpreted as a decrease of cooperation. This observation was strengthened by the significantly more abundant plasmid backbone genes in the metagenomes from the early spring. The modularity of the network from the late spring was also found to be higher than the one from the early spring, which is another possible indicator of increased competition. Antibiotic resistance genes were significantly more abundant in the late spring metagenomes. In addition, antibiotic resistance genes were also positively correlated to the organic acid concentration of the snow across both seasons. Snow organic acid content might be responsible for this change in bacterial interactions in the Arctic snow community." @default.
• W2987442885 created "2019-11-22" @default.
• W2987442885 creator A5012060124 @default.
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• W2987442885 date "2019-10-31" @default.
• W2987442885 modified "2023-10-09" @default.
• W2987442885 title "Do Organic Substrates Drive Microbial Community Interactions in Arctic Snow?" @default.
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• W2987442885 doi "https://doi.org/10.3389/fmicb.2019.02492" @default.
• W2987442885 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6842950" @default.
• W2987442885 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31749784" @default.
• W2987442885 hasPublicationYear "2019" @default.
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