【摘 要】
：
The abundance and community diversity of ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB) in ten soil samples of Mount Cang were explored in this study.Through qualified analysis of t
【机 构】
：
Dalian University of Technology,Dalian 116024
【出 处】
：
第十六次全国环境微生物学学术研讨会
论文部分内容阅读
The abundance and community diversity of ammonia-oxidizing archaea (AOA), ammonia-oxidizing bacteria (AOB) in ten soil samples of Mount Cang were explored in this study.Through qualified analysis of the two communities, it was found that all the ten sampling sites contained aerobic ammonia oxidation communities with different composition ratio of AOA versus AOB (and the abundance of AOA generally outnumbered AOB).All the obtained AOA sequences belonged to freshwater/soil/sediments lineage and Nitrosospira was discovered to be dominant in AOB.Furthermore, redundancy analysis indicated that soil pH and ammonium concentration had strong influences on the two communities.Moreover, moisture content and electrical conductivity correlated significantly with the abundance of AOA.These results provided a better understanding on the main microorganisms involved in nitrogen evele in nlateau soil environment.
其他文献
陕西黄河湿地地处关中平原东部，总面积57348hm2.区内野生动植物资源及生物多样性丰富，大量陆生、水生小动物等的存在，为大鸨提供了栖息、觅食的良好生存环境，也是创造大鸨多年来持续、稳定迁徙到此的主要原因.近年来由于人口快速增长及对湿地的过渡开发，使得大鸨的栖息地域越来越小，大鸨不得不迁往距离河心更近、人员活动少的区域栖息.大鸨在我地属冬候鸟，来时万木枯黄，滴水成冰，为大鸨觅食造成了不少困难，有时
2012年5月至9月，选择荒漠草原、人工固沙柠条林、固定半固定沙地三类生境9个样地，采用巴氏罐诱法调查研究了宁夏白芨滩国家级自然保护区地表甲虫的群落结构及其时序动态.结果共采集到地表甲虫标本3853头，分属于19科49属68种.拟步甲科(Tenebrionidae)是该地区地表甲虫中的绝对优势类群，有23种，占总种数的33.8％，占个体总数的82.48％，其次是步甲科(Carabidae)(6.3
2010年5月-10月对银川市芦花台湿地昆虫群落组成和结构变化进行调查，共采集昆虫10578只，隶属12目70科217种.根据营养水平和取食关系归为3 个营养层(基位物种、中位物种和顶位物种)和7 个功能团，分析了昆虫群落的物种、功能团和营养层多样性的时序动态及群落稳定性.结果表明，食花芽类昆虫、刺吸类昆虫和中性昆虫为昆虫群落的优势功能团，个体数量分别占总数量的16.01％、32.35％和33.3
中亚林蛙(Rana asiatica Bedriaga,1898)的模式标本产地在新疆的伊犁河上游,主要分布在中国新疆伊犁河流域、哈萨克斯坦南部和吉尔吉斯斯坦北部.中亚林蛙的分布区高度片断化,形成一些孤岛状分布地.中亚林蛙主要生活在山区,海拔高度在700-1000m.本研究采集了伊犁地区的中亚林蛙,包括了喀什河、巩乃斯河和特克斯河,以线粒体DNA中的cyt b基因和ND2基因片断作为遗传信息的来源
Escherichia coli K-12 utilizes 3-(3-hydroxyphenyl)propionate (3HPP) as a sole carbon and energy source.Among its catabolic cluster in the genome, mhpT was proposed to encode a hypothetical transporter
The demand for versatile bacterial strains which can be used in bioremediation of polycyclic aromatic hydrocarbons (PAHs) and arsenic co-contamination continues to grow as co-occurrence of two categor
本文从天津、河北等地采集的盐碱地土样中分离筛选到20株耐盐碱(可耐受8％ NaC1浓度和pH8.0)的木霉菌株.以烟草瓜果腐霉菌、烟草疫霉菌为供试病原菌，通过平板对峙试验和盆栽试验，对所筛选菌株的抗病效果进行评价，结果表明，所筛选木霉菌对两种病原菌均具有不同程度的抑制作用，其中17号木霉菌株的盆栽防治效果最好，对烟草猝倒病和黑胫病的防治效果分别达到75％和100％，其次为4号和7号菌株.最后，通过
九龙江是福建省第二大河流,是龙岩、漳州和厦门的主要饮用水源.由于人类活动和城市化进程影响,九龙江水质富营养化程度加剧,生态环境问题日益严峻.本文应用454焦磷酸测序技术,研究九龙江两大支流(西溪和北溪)浮游和底栖细菌群落组成的空间分布特征,并分析其对人为扰动的响应.多样性指数分析表明,与浮游细菌群落相比,九龙江底栖细菌群落的遗传多样性和种质均匀度较高.RDP Classifier分类分析表明,九龙
A bacterial strain P2 capable of degrading 3, 5, 6-trichloro-2-pyridinol (TCP) was isolated and characterized.Based on morphological, physiological, biochemical characters, and phylogenetic analysis,
Many microorganisms, especially filamentous fungi, could efficiently degrade lignocellulose, which is a complex carbohydrate and aromatic polymers in plant cell wall and is the most abundant natural m