Temperature affects microbial decomposition of cadavers (Rattus rattus) in contrasting soils
Temperature affects microbial decomposition of cadavers (Rattus rattus) in contrasting soils
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DOI：
10.1016/j.apsoil.2008.03.010
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发表时间：
2008-09-01
影响因子：
4.8
通讯作者：
Tibbett, Mark
中科院分区：
文献类型：
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作者：
Carter, David O.;Yellowlees, David;Tibbett, Mark
与死亡哺乳动物(即身体)有关的土壤的生态学知之甚少。虽然温度和土壤类型都会影响其他有机资源斑块的分解，但这些变量对土壤中身体降解的影响却鲜有实验研究。为了解决这个问题，幼年老鼠(Rattus Rattus)的身体被埋葬在来自澳大利亚昆士兰热带稀树草原生态系统的三种不同土壤(Sodosol、Rudosol和Vertosol)中的一种，并在实验室环境中分别在29摄氏度、22摄氏度或15摄氏度下孵化。身体和土壤在28天的潜伏期内每隔7天进行破坏性采样。腐解指标包括身体质量损失、二氧化碳-碳(CO2-C)演变、微生物量碳(MBC)、蛋白酶活性、磷酸二酯酶活性和土壤pH，这些指标都受到身体埋葬的显著正向影响。观察到了温度效应，在较高温度下出现的分解峰或分解差异将在较低温度下的较晚采样期间出现。土壤类型对某些测量参数也有重要影响。这些发现对一个在很大程度上未被探索的土壤生态和养分循环领域具有重要意义，这对法医科学、墓地规划和牲畜身体处理具有重要意义。爱思唯尔出版公司(Elsevier B.V.)
The ecology of soils associated with dead mammals (i.e. cadavers) is poorly understood. Although temperature and soil type are well known to influence the decomposition of other organic resource patches, the effect of these variables on the degradation of cadavers in soil has received little experimental investigation. To address this, cadavers of juvenile rats (Rattus rattus) were buried in one of three contrasting soils (Sodosol, Rudosol, and Vertosol) from tropical savanna ecosystems in Queensland, Australia and incubated at 29 degrees C, 22 degrees C, or 15 degrees C in a laboratory setting. Cadavers and soils were destructively sampled at intervals of 7 days over an incubation period of 28 days. Measurements of decomposition included cadaver mass loss, carbon dioxide-carbon (CO2-C) evolution, microbial biomass carbon (MBC), protease activity, phosphodiesterase activity, and soil pH, which were all significantly positively affected by cadaver burial. A temperature effect was observed where peaks or differences in decomposition that at occurred at higher temperature would occur at later sample periods at lower temperature. Soil type also had an important effect on some measured parameters. These findings have important implications for a largely unexplored area of soil ecology and nutrient cycling, which are significant for forensic science, cemetery planning and livestock carcass disposal. Published by Elsevier B.V.