The biochemical alteration of soil beneath a decomposing carcass
The biochemical alteration of soil beneath a decomposing carcass
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DOI：
10.1016/j.forsciint.2008.07.001
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发表时间：
2008-09-18
影响因子：
2.2
通讯作者：
Forbes, Shari L.
中科院分区：
文献类型：
--
作者：
Benninger, Laura A.;Carter, David O.;Forbes, Shari L.
与户外环境中身体腐烂相关的过程，特别是那些发生在延长的尸检间隔(>；30天)期间的过程，人们知之甚少。因此，目前几乎没有方法可以准确估计延长的死后时间间隔(PMI)。在这些方法中，基于土壤的方法有可能解决昆虫学和人类学之间最有价值的死后间隔。虽然以前已经确定了基于土壤的方法的有效性，但几乎没有开展工作来解释被指定用于法医应用的过程。因此，我们调查了放置在土壤表面100天的猪(Sus Scrofa)身体(坟墓油)下土壤中碳、氮和磷化合物的动态。通过身体的物理特性、土壤pH值、土壤水分含量以及土壤中总碳、总氮、土壤可提取磷和脂磷的浓度来评估腐解情况。身体腐烂不会导致土壤碳和水分含量的显著差异。而土壤pH、全氮、土壤速效磷和脂态磷浓度显著增加(P<；0.05)。根据目前的结果，土壤养分浓度的显著增加表现为最大PMI为43天(脂磷)、72天(全氮)或100天(土壤可提取磷)。这项工作提供了进一步的证据，表明基于土壤的方法具有作为估计扩展PMI的工具的潜力。(C)2008爱思唯尔爱尔兰有限公司。保留所有权利。
The processes associated with cadaver decomposition in outdoor settings, particularly those that occur during the extended Postmortem interval (>30 days) are poorly understood. Thus, few methods are currently available to accurately estimate the extended postmortem interval (PMI). Of these methods, a soils-based approach has the potential to address the postmortem interval between which entomology and anthropology are the most valuable. Although the validity of soil-based methods has previously been established, little work has been conducted to explain the processes that have been designated for forensic application. As a consequence, we investigated the dynamics of carbon, nitrogen, and phosphorus-based compounds in soil beneath pig (Sus scrofa) cadavers (gravesoil) that were placed on the soil surface over a period of 100 days. Decomposition was assessed through the physical characteristics of the cadaver, soil pH, soil moisture content, and the concentration of total carbon, total nitrogen, soil-extractable phosphorus, and lipid-phosphorus in soil. Cadaver decomposition did not result in a significant difference in soil carbon and moisture content. However, significant (P < 0.05) increases were observed in the concentration of soil pH, total nitrogen, soil-extractable phosphorus, and lipid-phosphorus. Based on the current results, a significant increase in the concentration of gravesoil nutrients represented a maximum PMI of 43 days (lipid-P), 72 days (total nitrogen), or 100 days (soil-extractable phosphorus). This work provides further evidence that a soil-based method has the potential to act as a tool for the estimation of extended PMI. (C) 2008 Elsevier Ireland Ltd. All rights reserved.