海岸带沉积物中氮循环功能微生物多样性
Phylogenetic and functional diversity of nitrogen cycling microbes in coastal sediments
查看参考文献113篇
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文摘
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海岸带生境类型多样,环境梯度明显,是研究微生物多样性、群落结构与功能关系及调控机制的天然实验场。沉积物是海岸带环境中营养盐再生与转化发生的重要场所,其中多种微生物类群在氮素循环过程中扮演重要角色。本文重点介绍海岸带沉积物中固氮菌、氨氧化菌、厌氧氨氧化菌、反硝化与硝酸盐铵化微生物的基于16SrRNA基因的物种多样性和基于关键酶基因nifH、amoA、narG、nirS、nirK、nosZ、nrfA、hzo、hzs等的功能多样性;总结了在海岸带特有生境(如河口、潮间带、海草藻床、红树林、盐沼、珊瑚礁、浅海等)及污染胁迫、生物扰动等条件下各功能类群的群落组成特征及时空变化规律,并提出今后需要重点关注新的培养技术和方法的开发,以进一步提高微生物的可培养性,将单细胞基因组测序与分析技术、DNA和RNA结合起来研究,以全面了解氮循环微生物多样性、参与介导硝酸盐铵化过程的微生物多样性等方面。 |
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其他语种文摘
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The coastal zone contains diverse habitats which are usually characterized by strong environmental gradients (e.g. salinity, nutrients and pollutants). This makes the coastal zone an ideal experimental laboratory for describing microbial diversity and testing hypotheses on community structure, function and control. Coastal sediment is of significance in nutrient regeneration and transformation involving different assemblages of microbes in the nitrogen cycle. This review focuses on 16S rRNA gene-based phylogenetic diversity and the key enzyme encoding gene-based (e.g. nifH, amoA, narG, nirS, nirK, nosZ, nrfA, hzo and hzs) functional diversity of nitrogen fixing, ammonia oxidizing and anaerobic ammonia oxidation (Anammox) bacteria as well as bacteria and fungi involved in denitrification and dissimilatory nitrate reduction to ammonium (DNRA). Characteristics of community composition and diversity of nitrogen cycling microbes in different habitats (e.g. estuarine, intertidal flats, seagrass or seaweed beds, mangroves, salt marsh, coral reefs, and shallow seas), and their spatiotemporal patterns under benthic pollution or bioturbation are reviewed. Future directions for a better understanding diversity of nitrogen cycling microbes are suggested, such as culture methods and technologies, and single-cell sequencing, etc. |
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来源
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生物多样性
,2013,21(4):433-444 【核心库】
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DOI
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10.3724/sp.j.1003.2013.12027
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关键词
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分子生态
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功能基因多样性
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海洋底栖生物
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群落组成
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物种多样性
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系统分类
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地址
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中国科学院烟台海岸带研究所微生物生态与物质循环实验室, 山东, 烟台, 264003
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-0094 |
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学科
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微生物学 |
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基金
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中国科学院知识创新工程重要方向项目
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国家自然科学基金项目
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山东省自然科学基金青年基金
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文献收藏号
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CSCD:4892980
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