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Inconsistent diversity patterns of soil fungi and woody plants among habitat types in a karst broadleaf forest

文献类型： 外文期刊

作者： Peng, Wanxia 1 ; Song, Tongqing 1 ; Du, Hu 1 ; Chen, Huijun 1 ; Zeng, Fuping 1 ; Liu, Yongxian 3 ; Luo, Yiqi 4 ; Tan, Wei 1 ;

作者机构： 1.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China

2.Chinese Acad Sci, Inst Subtrop Agr, Huanjiang Observat & Res Stn Karst Ecosyst, Changsha 410125, Peoples R China

3.Guangxi Acad Agr Sci, Agr Resource & Environm Res Inst, Nanning 530007, Peoples R China

4.No Arizona Univ, Ctr Ecosyst Sci & Soc Ecoss, Flagstaff, AZ 86011 USA

5.Management Ctr Guangxi Mulun Natl Nat Reserve, Huanjiang 547100, Peoples R China

关键词： Diversity pattern; Soil fungi; Woody plants; Habitat types; Illumina sequencing; Karst ecosystems

期刊名称：FOREST ECOLOGY AND MANAGEMENT （ 影响因子：3.558； 五年影响因子：4.039 ）

ISSN： 0378-1127

年卷期： 2020 年 474 卷

页码：

收录情况： SCI

摘要： The diversity patterns of macroorganisms (i.e., plants) among different habitats have been well documented, however, those of microorganisms (i.e., fungi) as well as the relationships between them are still unclear. Here, we tested whether and to what degree fungal diversity was related to habitat types and compared diversity patterns of woody plants and soil fungi. We carried out field investigations on soil fungi in different habitat types (i.e., valleys, foothills, hillsides, and hilltops) in a 25-ha karst broadleaf forest in Southwest China. The tree richness, Shannon index, and Simpson index significantly increased from valleys to hilltops. While the soil fungal N-1 diversity (the exponential Shannon index) marginally increased toward valleys, fungal N-0 (richness) and N-2 (the inverse Simpson index) diversity exhibited significantly reduced and increased patterns, respectively, from valleys to hilltops. The major fungal functional groups (i.e., EcM, AM, saprotrophic, and pathogenic fungi) showed similar increasing richness patterns in valleys. Moreover, woody plant alpha diversity was an important indicator of fungal functional groups except for EcM and AM fungi. In addition, woody plants increased in species turnover rate (beta SIM) from valleys to hilltops, while fungal species had a concave distribution. The pat-terns of nestedness (beta SNE) for tree species decreased from valleys to hilltops, while the opposite was true for soil fungal species. Our findings indicated that the diversity patterns of woody plants and fungi were inconsistent among habitat types, and the relationships between fungal and woody plant communities depended on habitat types in the karst forest.

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