岩溶区植被和季节对土壤微生物遗传多样性的影响

被引：23

作者：

何寻阳 ^{[1
,2
]}

王克林 ^{[1
]}

于一尊中国科学院亚热带农业生态研究所 ^{[2
]}

张伟 ^{[1
]}

陈志辉 ^{[1
,2
]}

机构：

[1] 中国科学院亚热带农业生态研究所

[2] 中国科学院研究生院

来源：

生态学报 | 2009年 / 29卷 / 04期

关键词：

微生物多样性; PCR-DGGE; 季节变化; 植被效应;

D O I：

暂无

中图分类号：

S154.3 [土壤微生物学];

学科分类号：

071012 ; 0713 ;

摘要：

基于土壤微生物遗传多样性随植被和季节的变化而变化的假设,运用变性梯度凝胶电泳技术(DGGE)检测岩溶区草丛(T)、灌丛(S)、次生林(SF)和原生林(PF)群落演替过程中土壤细菌和真菌群落的遗传多样性及其季节变化。随着地上植被的演替土壤细菌群落具有连续性但优势种群不明显,真菌群落没有连续性但优势种群明显。植被和季节对于细菌和真菌群落的Shannon多样性具有不同程度的显著影响,同时存在显著的植被和季节交互作用。草丛土壤中细菌和真菌群落的Shannon多样性有显著的季节变化(p<0.01);灌丛土壤中仅细菌群落多样性有显著季节变化(p<0.05);而森林土壤中细菌和真菌群落多样性没有显著的季节变化。土壤真菌和细菌多样性具有显著正相关关系。随着地上植被的正向演替,土壤微生物遗传结构逐渐稳定;植被恢复早期阶段,土壤中存在着丰富的微生物遗传多样性,但并不稳定。

引用

页码：1763 / 1769

页数：7

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