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南矶山湿地典型植物群落土壤细菌群落结构变化

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在2009年、2010年和2011年的10月,研究了位于鄱阳湖主湖区南部的南矶山湿地的南荻(Triarrhena lutarioriparia)群落、灰化薹草(Carex cinerascens)群落和狗牙根(Cynodon dactylon)群落下的土壤垂直剖面的细菌群落结构,采用末端限制性片段长度多态性(T-RFLP)分析方法,以及主成分分析、细菌群落-土壤因子相关分析和典范对应分析方法,探究细菌群落结构变化规律及其影响因素.结果表明,南矶山湿地土壤细菌群落结构年变化显著,2011年10月的土壤细菌群落显著不同于2009年和2010年的10月;其次影响土壤细菌群落结构分布的是植物群落类型,在同一年内,狗牙根群落的土壤细菌群落显著不同于灰化薹草群落和南荻群落;而0～45 cm深度的土壤细菌群落结构无深度差异.尽管湿地土壤总磷含量显著影响土壤细菌群落的年际分布,各植物群落土壤总有机质含量、总有机碳含量、总氮含量和含水量都显著影响其土壤细菌群落结构,但仅能解释细菌群落结构变化的11.6％.
Variation of Structure of Bacterial Communities in Soils with Typical Plant Communities in Nanjishan Wetlands
The soil samples at depths of 0-15 cm,15-30 cm and 30-45 cm in three typical sites covered with Carex cinerascens,Triarrhena lutarioriparia and Cynodon dactylon) of Nanjishan wetlands were collected in October 2009,October 2010 and October 2011.The structures of bacterial communities in the soils with three kinds of plant communities were examined by terminal restriction fragment length polymorphism (T-RFLP).To explore variation of the structures of bacterial communities and the influencing factors on them,the T-RFLP relative abundance data and physicochemical parameters were analyzed by principal component analysis (PCA),canonical correspondence analysis (CCA) and pearson correlation analysis.The results showed there were significant variations of soil bacterial communities among the samples and years.The structure of soil bacterial communities in October 2011 was significantly different from those in October of 2009 and 2010.In addition,the vegetation was also significant impacted the structures.The structures of soil bacterial communities with Cynodon dactylon was significantly different from Carex cinerascens and Triarrhena lutarioriparia in the same year.However,there was no significantly different between three soil depths.The results further showed the content of total phosphorus in the soil significantly affected the structure of bacterial communities;the ash free dry mass,and contents of total organic carbon,total nitrogen,and moisture in the soils significantly affected the structure of soil bacterial communities.But these physicochemical parameters only explain 11.6％ of the variation of the bacterial communities.

bacterial community in soilstructureplant communityinterannual variationterminal restriction fragment length polymorphism (T-RFLP)Nanjishan wetlands

刘芳鹏、许光勤、刘倩纯、李金前、寇文伯、吴兰

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南昌大学生命科学学院,江西南昌330031

江西省鄱阳湖流域绿色发展与水安全协同创新中心,江西南昌330031

土壤细菌群落 结构 植物群落 年际变化 末端限制性片段长度多样性(T-RFLP) 南矶山湿地

国家自然科学基金国家自然科学基金

3136012730860062

2015

10.13248/j.cnki.wetlandsci.2015.04.009

湿地科学
中国科学院 东北地理与农业生态研究所

湿地科学

CSTPCDCSCD北大核心
影响因子：1.52
ISSN：1672-5948
年,卷(期)：2015.13(4)
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