Publications

*Equal Contributions, # Corresponding author

Submitted

Roy, S., King, G., & Hernández, M. Classification of MAGs associated with trace gas metabolism in volcanic soils named following SeqCode rules. In review

Roy, S.#, & Bagchi, S. Decoupling between functional diversity and stability of decomposer functions in natural and agroecosystems can favour resistance. In review

Accepted

Jana, A.*, Roy, S.*#, Bagchi, S., Isvaran, K., & Karanth, P. (2025) Gut feeling: host and habitat as drivers of the microbiome in blackbuck (Antilope cervicapra). Wildlife Biology e01381 DOI: 10.1002/wlb3.01381

Highlight: Host genetic diversity is more important for the gut microbiome than external environments, highlighting the importance of the ‘Holobiont’ concept.

Roy, S., Dawson, R. A., Bradley, J. A., & Hernández, M. (2025) Antimicrobial resistance in Arctic soils is mediated by competition and facilitation. BMC Microbiology 25, 50 DOI: 10.1186/s12866-025-03745-7

Highlight: Antimicrobial resistance in recently deglaciated Arctic soils increases over time, and its temporal spread is dependent on competitive and facilitative interactions among microbes for nutrients.

Baidya., P.*, Roy, S.*, Karapurkar, J., & Bagchi, S. (2025) Replacing native grazers with livestock influences arthropods to have implications for ecosystem functions and disease. Ecological Applications 35 (1), e3091 DOI: 10.1002/eap.3091

Highlight: Livestock expansion at the cost of native large mammalian herbivores influences arthropod communities with potential implications for ecosystem functions (via a decrease in spiders and an increase in grasshoppers).

Roy, S., Karapurkar, J., Baidya, P., Jose, M., & Bagchi, S. (2023) Community composition, and not species richness of microbes, influences decomposer functional diversity in soil. Soil Biology and Biochemistry 187, 109225 DOI: 10.1016/j.soilbio.2023.109225

Highlight: Soil microbial communities and functions are more variable across time than over space. The relationship between microbial diversity and function is robust to the presence or absence of large mammalian herbivores

Hernández, M., Roy, S., Keevil, C. W., & Dumont, M. G. (2023) Identification of diverse antibiotic resistant bacteria in agricultural soil with H218O stable isotope probing and metagenomics. Environmental Microbiome 18, 34 DOI: 10.1186/s40793-023-00489-7

Highlight: Active resistant soil microbiome from an agricultural field with no prior history of antibiotic exposure using DNA-SIP with H218O was identified.

Roy, S., Naidu, DGT., & Bagchi, S. (2023) Functional substitutability of native herbivores by livestock for soil carbon stock is mediated by microbial decomposers. Global Change Biology 29 (8), 1-15 DOI: 10.1111/gcb.16600

Highlight: Microbial carbon use efficiency (CUE) was 19% lower in soils under livestock grazing than grazing by native herbivores, which led to 25% less soil-C under livestock. Extensive therapeutic and sub-therapeutic use of antibiotics on livestock may restrict soil-C by altering soil microbial CUE.

Naidu, DGT., Roy, S., & Bagchi, S. (2022) Loss of grazing by large mammalian herbivores can destabilize the soil carbon pool. Proceedings of the National Academy of Sciences 119 (43), 1-7 DOI: 10.1073/pnas.2211317119

Highlight: Grazing increases the temporal variability of soil carbon through soil nitrogen.

Roy, S., & Bagchi, S. (2022) Large mammalian herbivores and the paradox of soil carbon in grazing ecosystems: role of microbial decomposers and their enzymes. Ecosystems 25, 976–988 DOI: 10.1007/s10021-021-00696-8

Highlight: Despite herbivores diverting a major fraction of the plant production for secondary production, how can moderate grazing promote soil-C sequestration? The grazer-effect on microbial extracellular enzymes can be the proximate driver of soil-C.

Bagchi, S., Roy, S., Maitra, A., & Sran, R. S. (2017) Herbivores suppress soil microbes to influence carbon sequestration in the grazing ecosystem of the Trans-Himalaya. Agriculture, Ecosystems and Environment 239, 199-206 DOI: 10.1016/j.agee.2017.01.033

Highlight: Grazer effect on microbial abundance and community composition may play crucial roles in net soil-C dynamics. But, this effect is constrained by moisture availability

Saha, S. P., Roy, S., & Saha, D. (2014) Determination of microbiological status of the raw and pasteurized milk samples from Kolkata market with reference to coliforms. MAC Journal of Basic and Applied Sciences vol.1 ISSN: 2347-5366.

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