互花米草入侵下红树林土壤微生物群落特征

为了探索互花米草入侵下的红树林土壤微生物的群落特征,运用Biolog微平板技术对闽江河口湿地红树林和互花米草根际的土壤微生物的碳源代谢能力和功能多样性进行了分析,探讨了互花米草根际土壤微生物与红树林植物的差异。结果表明:红树林-互花米草混交区域(MS)的土壤微生物功能多样性和丰富度都要高于红树林群落(MC)和互花米草群落(SC)。Biolog微平板上的平均颜色变化率(AWCD)值整体呈现出随着培养时间的增加而增长的趋势,不同类型的植物变化曲线不同。聚合物类是各植被类型土壤微生物的主要碳源,酚酸类利用率最低。在土壤微生物的Simpson指数、Shannon指数和Richness指数中MS显示出最高,表明其土壤微生物多样性最为丰富。主成分分析表明,31个因素中与碳源利用相关的两大主成分,主成分1(PC1)和主成分2(PC2)分别可以解释变量方差的77.7%和22.2%,酚酸类和胺类在主成分分离中起主要的贡献作用。研究表明,不同植被类型其根系土壤微生物碳源代谢能力不同,MS的土壤微生物功能多样性最为丰富。

Features of Mangrove soil microbial community with Spartina alterniflora invaded

In order to figure out the features of the Mangrove soil microbial community with Spartina alterniflora invasion.This paper used the Biolog ecoplate technology to study the carbon source metabolic capacity and the function diversity of S.alterniflora community and Mangrove soil microbial community at Min Jiang estuary wetland and discussed their difference.The results showed that both the soil microbial function diversity and the richness in the Mangrove-S.alterniflora community (MS) area were higher than Mangrove community (MC) or S.alterniflora community (SC).In general,the average well color development (AWCD)increased with time going,and different plants type had a different variation curve.The polymer was the main carbon source of the three different plants,and the use efficiency of the phenolic acid was the lowest.For the three Simpson index,Shannon index and Richness index,the MS is the highest.Principal component analysis (PCA) identified identified 2 principal component factors in relation to carbon sources explaining 77.7％ and 22.2％ of the variation respectively.The carbon sources used by soil microbial community differed with vegetation types.Amino acid and carboxylic acid were the two main carbon sources separating the 2 principal component factors.The researches indicated that different plant type had different root system soil microbial metabolic capacity,the stagger area of the Mangrove and the S.alterniflora community had the most abundant soil microbial function diversity.