Treating cattle with antibiotics affects greenhouse gas emissions, and microbiota in dung and dung beetles

Tobin Hammer, Noah Fierer, Bess Hardwick, Asko Juhani Simojoki, Eleanor Margaret Slade, Juhani Taponen, Heidi Maria Viljanen, Tomas Valter Roslin

Tutkimustuotos: ArtikkelijulkaisuArtikkeliTieteellinenvertaisarvioitu

Abstrakti

Antibiotics are routinely used to improve livestock health and growth. However, this practice may have unintended environmental impacts mediated by interactions among the wide range of micro- and macroorganisms found in agroecosystems. For example, antibiotics may alter microbial emissions of greenhouse gases by affecting livestock gut microbiota. Furthermore, antibiotics may affect the microbiota of nontarget animals that rely on dung, such as dung beetles, and the ecosystem services they provide. To examine these interactions, we treated cattle with a commonly used broad-spectrum antibiotic and assessed downstream effects on microbiota in dung and dung beetles, greenhouse gas fluxes from dung, and beetle size, survival and reproduction. We found that antibiotic treatment restructured microbiota in dung beetles, which harbored a microbial community distinct from those in the dung they were consuming. The antibiotic effect on beetle microbiota was not associated with smaller size or lower numbers. Unexpectedly, antibiotic treatment raised methane fluxes from dung, possibly by altering the interactions between methanogenic archaea and bacteria in rumen and dung environments. Our findings that antibiotics restructure dung beetle microbiota and modify greenhouse gas emissions from dung indicate that antibiotic treatment may have unintended, cascading ecological effects that extend beyond the target animal.
Alkuperäiskielienglanti
Artikkeli20160150
LehtiProceedings of the Royal Society B. Biological Sciences
Vuosikerta283
Numero1831
Sivumäärä7
ISSN0962-8452
DOI - pysyväislinkit
TilaJulkaistu - toukokuuta 2016
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

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  • 4111 Maataloustiede
  • 1181 Ekologia, evoluutiobiologia

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