Potential Use of Bacterial Community Succession in Decaying Human Bone for Estimating Postmortem Interval
Potential Use of Bacterial Community Succession in Decaying Human Bone for Estimating Postmortem Interval
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DOI：
10.1111/1556-4029.12744
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发表时间：
2015-07-01
影响因子：
1.6
通讯作者：
Layton, Alice C.
中科院分区：
文献类型：
--
作者：
Damann, Franklin E.;Williams, Daniel E.;Layton, Alice C.
细菌是人体尸体分解的埋藏剂，在尸体后期分解过程中对推断死亡时间（PMI）有潜在的应用价值。分析了12个人的骨骼样本和3个土壤样本，以评估分解和推进时间对细菌群落的影响。结果表明，部分去离子的遗骸保持与人类肠道相关的细菌的存在，而干骨骼遗骸的细菌组成保持了类似于土壤群落的群落特征。对于未加权度量而非加权度量，组间UniFrac距离的变化显著大于组内（p < 0.001）。的细菌群落的成员更相似的内部比之间的分解阶段。骨相对于软组织的贫营养环境和有机基质的物理保护可能会在骨化的最初几年中阻止细菌大量繁殖。因此，社区成员资格（未加权）可能比社区结构（加权）更适合于从石化遗骸中估计PMI。
Bacteria are taphonomic agents of human decomposition, potentially useful for estimating postmortem interval (PMI) in late-stage decomposition. Bone samples from 12 individuals and three soil samples were analyzed to assess the effects of decomposition and advancing time on bacterial communities. Results indicated that partially skeletonized remains maintained a presence of bacteria associated with the human gut, whereas bacterial composition of dry skeletal remains maintained a community profile similar to soil communities. Variation in the UniFrac distances was significantly greater between groups than within groups (p < 0.001) for the unweighted metric and not the weighted metric. The members of the bacterial communities were more similar within than between decomposition stages. The oligotrophic environment of bone relative to soft tissue and the physical protection of organic substrates may preclude bacterial blooms during the first years of skeletonization. Therefore, community membership (unweighted) may be better for estimating PMI from skeletonized remains than community structure (weighted).