互花米草入侵背景下氮输入增加对天津滨海湿地芦苇凋落物可培养细菌和真菌群落的影响  

Effects of nitrogen input increase on bacterial and fungal communities in Phragmites australis litter in Tianjin coastal wetland under Spartina alterniflora invasion

作　　者：王佳宁 张慧敏 李宁宁[1,2] 钟晓莹 徐阁远[1,2] 朱琳 郭宏宇 王银华[1,2] WANG Jianing;ZHANG Huimin;LI Ningning;ZHONG Xiaoying;XU Geyuan;ZHU Lin;GUO Hongyu;WANG Yinhua(School of Life Sciences,Tianjin Normal University,Tianjin 300387,China;Tianjin Key Laboratory of Animal and Plant Resistance,Tianjin Normal University,Tianjin 300387,China)

机构地区：[1]天津师范大学生命科学学院,天津300387 [2]天津师范大学天津市动植物抗性重点实验室,天津300387

出　　处：《天津师范大学学报（自然科学版）》2024年第4期32-38,共7页Journal of Tianjin Normal University：Natural Science Edition

基　　金：国家自然科学基金资助项目(32001179,31300357);天津市自然科学基金资助项目(20JCZDJC00220)。

摘　　要：为了探究互花米草入侵和氮输入增加条件下滨海湿地微生物群落的变化,在天津滨海湿地选取3个样地(互花米草入侵程度不同)进行原位模拟增氮实验,分析不同实验条件下芦苇凋落物可培养细菌和真菌群落组成及多样性差异.结果显示:互花米草入侵提高了细菌和真菌的数量及多样性,且随着入侵程度的增加,微生物数量和多样性增加;随着氮输入水平的增加,细菌和真菌数量及多样性先增加后降低;土壤铵态氮含量和pH值是影响细菌群落组成的主导土壤因子,土壤有机质含量和铵态氮含量是影响真菌群落组成的主导土壤因子.In order to explore the changes of microbial communites in costal wetlands under the conditions of Spartina al-terniflora invasion and nitrogen input increase,three sampling plots(with different invasion degree of Spartina alterniflora)in Tianjin coastal wetland were selected for in-situ simulated nitrogen increase experiment.The composition and diversity of cul-turable bacterial and fungal communities in Phragmites australis litter under different experimental conditions were analyzed.The results showed that the invasion of Spartina alterniflora increased the number and diversity of culturable bacteria and fun-gi in Phragmites australis litter.With the increase of nitrogen input,the number and diversity of bacteria and fungi at first in-creased and then decreased.Soil ammonium nitrogen content and pH value were the main factors affecting the composition of bacterial community,while soil organic matter content and ammonium nitrogen content were the main factors affecting the composition of fungal community.

关 键 词：互花米草入侵 芦苇凋落物 氮输入增加 滨海湿地 微生物群落 

分 类 号：Q938.1[生物学—微生物学]