海南热带雨林土壤真菌时空分布格局

Spatiotemporal distribution of soil fungi in tropical rain forest in Hainan

土壤中微生物通过分解土壤中的有机残体为植物提供养分,在生态系统中起着重要的作用。为了明确海南岛热带雨林土壤真菌的组成及多样性时空分布特征,本研究以海南省五大热带雨林区——吊罗山、五指山、鹦哥岭、霸王岭和尖峰岭雨林旱季和雨季土壤真菌为对象,基于高通量基因测序技术分析土壤真菌群落组成与多样性时空分布格局。结果表明:热带雨林不同地点的真菌组成差异显著,不同季节的真菌多样性差异较大,全氮和全磷是影响旱雨季土壤真菌多样性的重要环境因子,解释率分别为13.07%和17.86%。热带雨林土壤真菌群落具有明显的时空分布特征,土壤养分是主要的驱动因子。

Soil microorganisms provide nutrients for plants by decomposing soil organic residues,which plays an important role in ecosystems.To clarify the composition and temporal and spatial variations of soil fungi in tropical rain forest of Hainan Island,we investigated soil fungi in dry season and rainy season of Diaoluo Mountain,Wuzhishan Mountain,Yingeling,Bawangling and Jianfengling rainforest in Hainan Province.The temporal and spatial variations of soil fungal community composition and diversity were analyzed based on high-throughput sequencing technique.The results showed that there were significant differences in fungal composition among tropical rain forests from different sites,and great differences in fungal diversity between the two seasons.Total nitrogen and total phosphorus concentrations were important environmental factors affecting the diversity of fungi in dry and rainy seasons,with an explanation rate of 13.07%and 17.86%,respectively.Collectively,soil fungal community in tropical rain forests has obvious temporal and spatial variations,which are mainly driven by soil nutrients.