象山港海域硫酸盐还原菌的时空分布及其影响因素  

Spatiotemporal distribution of sulfate-reducing bacteria in Xiangshan Bay and related affecting factors

作　　者：王海丽[1,2] 杨季芳[1,2] 

机构地区：[1]宁波市微生物与环境工程重点实验室,浙江宁波315100 [2]浙江万里学院生物与环境学院,浙江宁波315100

出　　处：《生态学杂志》2011年第12期2857-2862,共6页Chinese Journal of Ecology

基　　金：国家海洋公益性项目(200705014);国家科技部国际合作重点项目(2007DFA21300);国家高技术研究计划项目(2007AA091902);宁波市科技局重大科技攻关项目(2006C100030)资助

摘　　要：分别于2007年7月(夏季)、11月(秋季)与2008年1月(冬季)、4月(春季),调查了象山港海域的水样(表层海水和上覆水)及沉积物中的硫酸盐还原菌丰度的时空分布特征及主要影响因素。结果表明,水样及沉积物中硫酸盐还原菌实测值的变化范围为30～2300cells·ml-1,沉积物中的硫酸盐还原菌数量高于上覆水及表层海水;硫酸盐还原菌丰度的平面分布均呈现不均匀状态,人类开发活动较多的地区明显高于其他站点。根据硫酸盐还原菌数量,对底质进行腐蚀性评价结果表明,象山港大部分范围底质具有中等强度腐蚀性。有机质污染、水温、pH是表层海水中硫酸盐还原菌分布的重要影响因素(P<0.01);上覆水中的硫酸盐还原菌含量与上覆水的营养盐(NO2--N、NH4+-N)呈显著正相关;沉积物中的硫酸盐还原菌含量与沉积物中的石油类呈显著正相关(P<0.05)。In July（summer） and November（autumn） 2007 and in January（winter） and April（spring） 2008,investigations were made on the spatiotemporal distribution of sulfate-reducing bacteria（SRB） in the seawater（surface water and overlying water） and sediment in Xiangshan Bay,and the relationships between the SRB abundance and environmental parameters were analyzed.The SRB abundance in the seawater and sediment had an obvious seasonal variation,ranged from 30 to 2300 cells·ml-1,and was higher in the sediment than in the surface water and overlying water.The SRB abundance also had an uneven horizontal distribution,being higher in the areas with more human activities.According to the SRB abundance,the sediments in most parts of the bay were of medium corrosive.Statistical analysis demonstrated that organic pollution,water temperature,and water pH were the main factors affecting the distribution of SRB in the surface water（P0.01）.In the overlying water,the SRB abundance was significantly positively correlated with the water NO2--N and NH4＋-N contents,whereas in the sediment,the abundance had a significant positive correlation with the petroleum substances（P0.05）.

关 键 词：象山港 硫酸盐还原菌 时空分布 环境因素 

分 类 号：Q938.8[生物学—微生物学]