Natural attenuation of legacy hydrocarbon spills in pristine soils is feasible despite difficult environmental conditions in the monsoon tropics.
Natural attenuation of legacy hydrocarbon spills in pristine soils is feasible despite difficult environmental conditions in the monsoon tropics.
复制标题
尽管季风热带地区环境条件恶劣，但原始土壤中遗留碳氢化合物泄漏的自然衰减是可行的。
DOI：
10.1016/j.scitotenv.2021.149335
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Gleeson DB
中科院分区：
文献类型：
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作者：
Gleeson DB
西澳大利亚州的金伯利地区是一个国家遗产地区，因其环境和文化意义而受到国际认可。然而，据报告，该区域的一些地点发生了石油泄漏，这是一个令人关切的环境问题。该地区还具有土壤养分低、高温和季风雨的特点，所有这些都可能限制石油自然生物降解的潜力。因此，这项工作评估了传统的石油碳氢化合物对土著土壤微生物群落（跨领域的真菌，细菌和真菌）在三个地点在金伯利地区的影响。在每个地点，从污染区和对照区取出土芯，分析总石油烃、土壤养分、pH值和微生物群落概况（使用Illumina MiSeq平台上的16S rRNA和ITS测序）。石油烃的存在降低了所有王国的微生物多样性，改变了微生物群落的结构，增加了推定的烃降解菌（如分枝杆菌，枝顶孢，青霉，BjerkanderaandCandida）的丰度。我们的研究强调了遗留碳氢化合物泄漏对偏远贫瘠季风土壤中土壤微生物群落及其多样性的长期影响，但也强调了这些环境中发生自然衰减的可能性。
The Kimberley region of Western Australia is a National Heritage listed region that is internationally recognised for its environmental and cultural significance. However, petroleum spills have been reported at a number of sites across the region, representing an environmental concern. The region is also characterised as having low soil nutrients, high temperatures and monsoonal rain – all of which may limit the potential for natural biodegradation of petroleum. Therefore, this work evaluated the effect of legacy petroleum hydrocarbons on the indigenous soil microbial community (across the domains Archaea, Bacteria and Fungi) at three sites in the Kimberley region. At each site, soil cores were removed from contaminated and control areas and analysed for total petroleum hydrocarbons, soil nutrients, pH and microbial community profiling (using16S rRNA and ITS sequencing on the Illumina MiSeq Platform). The presence of petroleum hydrocarbons decreased microbial diversity across all kingdoms, altered the structure of microbial communities and increased the abundance of putative hydrocarbon degraders (e.g.Mycobacterium,Acremonium,Penicillium,BjerkanderaandCandida).Microbial community shifts from contaminated soils were also associated with an increase in soil nutrients (notably Colwell P and S). Our study highlights the long-term effect of legacy hydrocarbon spills on soil microbial communities and their diversity in remote, infertile monsoonal soils, but also highlights the potential for natural attenuation to occur in these environments.