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机构地区:[1]大陆动力学国家重点实验室,西北大学地质系,西安710069
出 处:《古生物学报》2010年第3期407-412,共6页Acta Palaeontologica Sinica
基 金:国家自然科学基金(40872021);国家重点基础研究发展规划项目(2006CB806400);教育部新世纪人才项目;大陆动力学国家重点实验室项目;大学生创新性实验计划(国20081069703)联合资助
摘 要:通过实验,研究节肢动物在自然状态下的腐解发生和发展规律。跟踪记录腐解过程的Eh值和pH值的变化规律,并结合其宏观表现将腐解过程分为3个阶段。实验结果表明腐解过程受周围环境影响较大,不同的底质条件、水介质条件下的腐解速率有所差异,沉降在沙质表面上的尸体腐解最快,富含有机质的淤泥较慢,浸泡在淡水里面的尸体腐解最慢。由于有机质的分解,使得周围环境的Eh值和pH值均下降而呈强还原性但未明显呈酸性。不同类型的生物其腐解方式差异很大,研究节肢动物腐解过程,为节肢动物或类似动物软体的特异埋藏的过程提供依据。A series of experiments was carried out to explore the regularities of decay and disarticulation of arthropod carcasses in the natural states.Based on uninterrupted variation record of the Eh and pH values and its macroscopical performance,the degradation of the three arthropods can be subdivided into three stages.It turned out that the process of decomposition was evidently affected by the substrate and the surrounding medium.Carcasses that landed on the surface of sands decay and degrade more quickly than any others,while those that landed on the surface of mud rich in organic matter show very slow decay processes,and the slowest ones are those immersed in fresh water.The Eh and pH values drop greatly due to the degradation of organic matter,as a result,the surrounding environment is strongly reducing but not apparently acidic.There is a significant variation of decay and degradation of carcasses among different species.Understanding the controls on decay and fossilization in different environmental settings is critical to interpretation of taphonomy of soft-bodied organisms.
分 类 号:Q915[天文地球—古生物学与地层学]
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