引用本文:	张蕊,陈一然,周克,张文燕,肖天,吴龙飞.青岛潮间带趋磁细菌的垂直分布特征及与环境因子的关系[J].海洋科学,2013,37(10):24-31.

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青岛潮间带趋磁细菌的垂直分布特征及与环境因子的关系
张蕊^1,2,3, 陈一然^1,2,3, 周克⁴, 张文燕^1,3, 肖天^1,3, 吴龙飞^5,3
1.中国科学院海洋研究所, 海洋生态与环境科学重点实验室;2.中国科学院大学;3.中法生物矿化与纳米结构联合实验室;4.青岛农业大学, 资源与环境学院;5.法国科研中心地中海微生物研究所,细菌化学实验室

摘要:

趋磁细菌是一类能够沿着磁力线运动的革兰氏阴性细菌, 主要生活在淡水和海洋的有氧-无氧过渡区。本调查通过对青岛汇泉湾潮间带沉积物柱状样分层样品中趋磁细菌的计数和沉积物理化因子的分析, 研究了趋磁细菌的垂直分布特征及其与环境因子的关系。结果显示趋磁细菌以趋北型的趋磁球菌占优势, 主要分布环境的氧化还原电位为179.7～-107.0 mV, 为弱还原-还原性质, 最大丰度(94～169个/cm³)出现在氧化还原跃层(表层下5～9cm黄-黑沙界面处), 暗示有氧-无氧过渡区; 趋磁细菌的垂直变化趋势与粒径、含水率、硫酸盐的变化趋势基本一致。

关键词: 趋磁细菌垂直分布环境因子氧化还原电位潮间带

DOI：

分类号:

基金项目:国家自然科学基金项目(NSFC 41276170, 40906069,41106135, 40776094); 山东省万人计划项目

Vertical distribution characteristics of magnetotactic bacteria and the relationship with environmental factors in intertidal zone of Qingdao

Abstract:

Magnetotactic bacteria (MTB) are Gram-negative, motile prokaryotes that can orient and migrate along the geomagnetic lines of force. MTB are ubiquitous in sediments and stratified water column and distribute predominantly in the oxic-anoxic transition zone (OATZ). To study the vertical distribution of MTB and their relationships with environmental factors, sediment cores were collected from intertidal sites in the Huiquan Bay, Qingdao. The redox potential and temperature were measured in situ, and other geochemical parameters of the sediments and count of MTB were analyzed in laboratory. Results showed that the most abundant MTB are coccoid-shaped ones which swim toward the north pole. MTB were concentrated in the reduced environments with a redox potential ranging from 179.7 mV to -107.0 mV. The maximum abundance (94～169 ind./cm³) of MTB was observed at redox cline which was located at the yellow-black layers transition with a depth of 5～9 cm, implying it’s a OATZ. The MTB exhibited a similar vertical distribution manner with those of the grain size, water content and sulfate concentration in the sediment.

Key words: magnetotactic bacteria vertical distribution environmental factors redox potential intertidal zone