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Microbial community assembly and metabolic function during mammalian corpse decomposition

2015; American Association for the Advancement of Science; Volume: 351; Issue: 6269 Linguagem: Inglês

10.1126/science.aad2646

1095-9203

Jessica L. Metcalf, Zhenjiang Zech Xu, Sophie Weiss, Simon Lax, Will Van Treuren, Embriette R. Hyde, Se Jin Song, Amnon Amir, Peter E. Larsen, Naseer Sangwan, Daniel Haarmann, Greg Humphrey, Gail Ackermann, Luke Thompson, Christian L. Lauber, Alexander Bibat, Catherine Nicholas, Matthew J. Gebert, Joseph F. Petrosino, Sasha C. Reed, Jack A. Gilbert, Aaron M. Lynne, Sibyl R. Bucheli, David Carter, Rob Knight,

Human-Animal Interaction Studies

Vertebrate corpse decomposition provides an important stage in nutrient cycling in most terrestrial habitats, yet microbially mediated processes are poorly understood. Here we combine deep microbial community characterization, community-level metabolic reconstruction, and soil biogeochemical assessment to understand the principles governing microbial community assembly during decomposition of mouse and human corpses on different soil substrates. We find a suite of bacterial and fungal groups that contribute to nitrogen cycling and a reproducible network of decomposers that emerge on predictable time scales. Our results show that this decomposer community is derived primarily from bulk soil, but key decomposers are ubiquitous in low abundance. Soil type was not a dominant factor driving community development, and the process of decomposition is sufficiently reproducible to offer new opportunities for forensic investigations.