Arbuscular mycorrhizal fungal communities show low resistance and high resilience to wildfire disturbance
Arbuscular mycorrhizal fungal communities show low resistance and high resilience to wildfire disturbance
复制标题
DOI：
10.1007/s11104-015-2633-z
复制
发表时间：
2015-08
期刊：
影响因子：
4.9
通讯作者：
X. Xiang;S. Gibbons;Jian Yang;Jianjian Kong;Ruibo Sun;H. Chu
中科院分区：
文献类型：
--
作者：
X. Xiang;S. Gibbons;Jian Yang;Jianjian Kong;Ruibo Sun;H. Chu
野火是重要的干扰，有助于塑造森林生态系统的结构和功能，丛枝菌根真菌（AMF）是火灾后恢复土壤和林下植被的关键球员。我们的目的是调查AMF群落在不同时间尺度上对野火的反应。MethodsPrimer set AMV 4. 5 NF/AMDGR用于扩增土壤18 S rRNA基因片段，用于454 GS-FLX焦磷酸测序平台，以检查大兴安岭中国低强度和高强度野火后1年和11年的地下AMF群落。Claroideoglomeraceae、Diversisporaceae和Acaulosporaceae。AMF群落组成和α多样性与草本和灌木生物量，有效磷（AP）和NH 4+，这反过来又改变了野火。AMF社区组成，α多样性和系统发育结构显着改变火灾后1年。然而，AMF社区是无法区分的未燃烧的森林土壤11年后fire.ConclusionsOur结果表明，AMF社区是适应野火的十年时间尺度。这种弹性似乎取决于火后林下植被的再生和随后的土壤化学性质的恢复。
AimsWildfires are important disturbances that help to shape the structure and function of forest ecosystems, and arbuscular mycorrhizal fungi (AMF) are key players in the post-fire recovery of soils and understory vegetation. We aimed to investigate the response of AMF communities to wildfire over different timescales.MethodsPrimer set AMV4.5NF/AMDGR was used to amplify soil 18S rRNA gene fragments for the 454 GS-FLX pyrosequencing platform to examine belowground AMF communities 1 and 11 years following low- and high-intensity wildfires in the Greater Khingan Mountains of China.ResultsThe majority of AMF sequences detected were annotated asGlomeraceae,Claroideoglomeraceae,DiversisporaceaeandAcaulosporaceae. Both AMF community composition and alpha-diversity were correlated with herbaceous and shrubby biomass, available phosphorus (AP) and NH4+, which were in turn altered by wildfire. AMF community composition, alpha-diversity, and phylogenetic structure were significantly altered 1-year-post-fire. However, AMF communities were indistinguishable from unburned forest soils 11-year-post-fire.ConclusionsOur results indicated that AMF communities are resilient to wildfire on decadal timescales. This resilience appears to depend on the post-fire regrowth of understory vegetation and the subsequent recovery of soil chemical properties.