Exploring Actinobacteria assemblages in coastal marine sediments under contrasted Human influences in the West Istria Sea, Croatia
Exploring Actinobacteria assemblages in coastal marine sediments under contrasted Human influences in the West Istria Sea, Croatia
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DOI：
10.1007/s11356-015-4240-1
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发表时间：
2015-10-01
影响因子：
5.8
通讯作者：
Vujaklija, Dusica
中科院分区：
文献类型：
--
作者：
Duran, Robert;Bielen, Ana;Vujaklija, Dusica
探索海洋放线菌的主要挑战是回答微生物生态学的基本问题，这反过来将为生物技术过程中利用放线菌代谢提供有用的信息。海洋沉积物中放线菌的生态功能尚不清楚，属于最迫切的基本问题。比较不同污染类型影响下海洋沉积物中放线菌群落的差异，将为放线菌在特定生态位的定居适应能力提供有价值的信息。在本研究中，根据污染类型的不同放线菌组合的表征揭示了放线菌的生态重要性，通过“核心”放线菌群落和特定的角色与污染物的存在下，维持一般的生物地球化学功能。事实上，结果允许区分放线菌属和种的操作分类单位（OTU）能够科普的存在下，（一）作为，（二）金属镍，铁，钒，铬，锰，或（三）多环芳烃（PAH）和有毒金属（汞，镉，铜，铅，锌）。这些观察突出了放线菌的代谢能力及其潜力，在海洋生态系统中实施生物补救过程时应加以考虑和利用。
The exploration of marine Actinobacteria has as major challenge to answer basic questions of microbial ecology that, in turn, will provide useful information to exploit Actinobacteria metabolisms in biotechnological processes. The ecological functions performed by Actinobacteria in marine sediments are still unclear and belongs to the most burning basic questions. The comparison of Actinobacteria communities inhabiting marine sediments that are under the influence of different contamination types will provide valuable information in the adaptation capacities of Actinobacteria to colonize specific ecological niche. In the present study, the characterization of different Actinobacteria assemblages according to contamination type revealed the ecological importance of Actinobacteria for maintaining both general biogeochemical functions through a "core" Actinobacteria community and specific roles associated with the presence of contaminants. Indeed, the results allowed to distinguish Actinobacteria genera and species operational taxonomic units (OTUs) able to cope with the presence of either (i) As, (ii) metals Ni, Fe, V, Cr, and Mn, or (iii) polycyclic aromatic hydrocarbons (PAHs) and toxic metals (Hg, Cd, Cu, Pb, and Zn). Such observations highlighted the metabolic capacities of Actinobacteria and their potential that should be taken into consideration and advantage during the implementation of bioremediation processes in marine ecosystems.