Diversity and spatial distribution of sediment ammonia-oxidizing crenarchaeota in response to estuarine and environmental gradients in the Changjiang Estuary and East China Sea
Diversity and spatial distribution of sediment ammonia-oxidizing crenarchaeota in response to estuarine and environmental gradients in the Changjiang Estuary and East China Sea
复制标题
长江口及东海沉积物氨氧化缝隙菌多样性及空间分布对河口和环境梯度的响应
DOI：
10.1099/mic.0.2007/013581-0
复制
发表时间：
2008-07-01
期刊：
影响因子：
2.8
通讯作者：
Yang, Guanpin
中科院分区：
文献类型：
--
作者：
Dang, Hongyue;Zhang, Xiaoxia;Yang, Guanpin
氨氧化古菌（AOA）在陆地土壤、污水处理反应器、海洋沃茨和沉积物等环境中的氮循环中具有重要的作用，尤其是在河口地区。研究了长江口及邻近海域沉积物AOA的多样性、群落结构和空间分布。多元统计分析表明，不同样带的古菌amoA基因型群落具有一定的聚类性，位于河口混合带的站位具有明显的AOA群落。AOA群落的分布与表层水盐度梯度和沉积物分选系数显著相关。土壤AOA的空间分布表明长江淡水的排放对海洋底栖微生物生态系统产生了强烈的影响。除淡水、营养盐、有机质和悬浮颗粒物外，长江冲淡水还可能对陆生古菌沿其流路向海水和沉积物中的迁移起作用。
Ammonia-oxidizing archaea (AOA) have recently been found to be potentially important in nitrogen cycling in a variety of environments, such as terrestrial soils, wastewater treatment reactors, marine waters and sediments, and especially in estuaries, where high input of anthropogenic nitrogen is often experienced. The sedimentary AOA diversity, community structure and spatial distribution in the Changjiang Estuary and the adjacent East China Sea were studied. Multivariate statistical analysis indicated that the archaeal amoA genotype communities could be clustered according to sampling transects, and the station located in an estuarine mixing zone harboured a distinct AOA community. The distribution of AOA communities correlated significantly with the gradients of surface-water salinity and sediment sorting coefficient. The spatial distribution of putative soil-related AOA in certain sampling stations indicated a strong impact of the Changjiang freshwater discharge on the marine benthic microbial ecosystem. Besides freshwater, nutrients, organic matter and suspended particles, the Changjiang Diluted Water might also contribute to the transport of terrestrial archaea into the seawater and sediments along its flow path.