生物多样性 ›› 2022, Vol. 30 ›› Issue (7): 22110.  DOI: 10.17520/biods.2022110

• 研究报告: 微生物多样性 • 上一篇    下一篇

海南热带雨林国家公园不同植被类型的大型真菌多样性

李国华1, 郭向阳1, 李霖明2, 任明迅1,3, 万玲1, 丁琼1,3,*(), 李娟玲1,*()   

  1. 1.热带特色林木花卉遗传与种质创新教育部重点实验室, 海南大学, 海口 570228
    2.海南大学生命科学学院, 海口 570228
    3.海南大学生态与环境学院, 海口 570228
  • 收稿日期:2022-03-14 接受日期:2022-06-10 出版日期:2022-07-20 发布日期:2022-07-07
  • 通讯作者: 丁琼,李娟玲
  • 作者简介:*E-mail: dingqiong@hainanu.edu.cn;
  • 基金资助:
    海南热带雨林国家公园植被与植物资源总体把控与考察下的真菌调查及图鉴(HD-KYH-2020008-5);热带大型真菌资源的DNA条形码数据库构建(Hdcxcyxm201713);海南热带雨林灵芝属食用真菌资源评价与利用研究(321MS0764)

Macrofungal diversity in different vegetation types of Hainan Tropical Rainforest National Park

Guohua Li1, Xiangyang Guo1, Linming Li2, Mingxun Ren1,3, Ling Wan1, Qiong Ding1,3,*(), Juanling Li1,*()   

  1. 1. Key Laboratory of Genetics and Germplasm Innovation of Tropical Special Forest Trees and Ornamental Plants (Hainan University), Ministry of Education, Haikou 570228
    2. School of Life Sciences, Hainan University, Haikou 570228
    3. College of Ecology and Environment, Hainan University, Haikou 570228
  • Received:2022-03-14 Accepted:2022-06-10 Online:2022-07-20 Published:2022-07-07
  • Contact: Qiong Ding,Juanling Li

摘要:

为揭示海南热带雨林国家公园大型真菌多样性及不同植被类型对真菌群落的影响, 本研究于2020年和2021年湿季对海南热带雨林国家公园内7个管理局辖区开展了大型真菌多样性调查, 比较了不同植被类型(山地雨林、低地雨林、低地雨林次生林、人工林)的大型真菌生活型(共生型、腐生型)组成差异。从设置的58条1 km长的样带内采集到1,869份子实体标本, 根据子实体形态与ITS rDNA序列分析, 从中鉴定出562种真菌, 涉及17目64科174属, 其中80%以上的物种由伞菌目、牛肝菌目、红菇目、多孔菌目、鸡油菌目、锈革孔菌目和炭角菌目构成。大型真菌的营养型以腐生型(占48.2%物种)和共生型(44.8%)为主。每条样带的平均物种丰富度和多度以中海拔的山地雨林最高, 分别为28 ± 5种和33 ± 6个, 而人工林最低, 分别为11 ± 1种和11 ± 2个。植被类型主要影响共生型大型真菌物种丰富度(P = 0.026)和子实体多度(P = 0.019)及Shannon-Wiener多样性(P = 0.028), 但对腐生型大型真菌的影响并不显著。多响应置换过程(multiple response permutation procedure, MRPP)检验结果表明, 不同植被类型对共生型与腐生型大型真菌群落物种组成均有显著影响(腐生型: P = 0.004, 共生型: P = 0.041)。冗余分析(redundancy analysis, RDA)的结果表明, 植被类型对腐生型和共生型真菌群落物种组成差异的解释度均较低(共生型: R2 = 0.068, P = 0.004; 腐生型: R2 = 0.067, P = 0.004)。海拔仅对腐生型真菌群落物种组成产生微弱影响(R2 = 0.029, P = 0.001), 而对共生型真菌影响不显著(R2 = 0.024, P = 0.072)。在不同保护地之间, 共生型(R2 = 0.148, P = 0.001)与腐生型(R2 = 0.123, P = 0.002)真菌物种组成均具显著差异; 基于样带‒真菌矩阵的网络图显示, 海南热带雨林国家公园内尖峰岭、霸王岭、五指山等国家级自然保护区的山地雨林是共生型大型真菌多样性较高区域, 应作为共生型真菌与宿主的优先保护区域。

关键词: 国家公园, 大型真菌, 腐生型, 共生型, 热带山地雨林, 人工林

Abstract

Aims: To reveal macrofungal diversity and how different vegetation types affect the fungal community, an inventory of macrofungal diversity was carried out in seven management units within the Hainan Tropical Rainforest National Park during the wet seasons (June to September) in 2020 and 2021.
Method: Macrofungi were identified based on both morphology and analyses of ITS rDNA sequence data. A total of 562 fungal species belonging to 17 orders, 64 families, and 174 genera were identified from 1869 samples which were collected from 58 transects (ca. 1 km each).
Results: The most common fungal orders were Agaricales, Boletales, Russulales, Polyporales, Cantharellales, Hymenochaetales and Xylariales, accounting for 80% of species in this study. Saprophytic and symbiotic fungi were the most common functional groups, comprising 48.2% and 44.8% of fungal species respectively. Species richness and abundance per transect were the highest (richness: 28 ± 5 and abundance: 33 ± 6) in mountain rainforest and the lowest in forest plantation (11 ± 1 and 11 ± 2). Effects of vegetation type on diversity index, species richness and abundance varied with trophic mode of fungi. Specifically, vegetation type showed significant effect on species richness (P = 0.026), abundance (P = 0.019) and Shannon-Wiener diversity index (P = 0.028) of symbiotic fungi, but not on saprophytic fungi. Multiple response permutation procedure (MRPP) showed that saprophytic (P = 0.004) and symbiotic (P = 0.041) fungal species compositions were significantly different among forest types. Redundancy analysis (RDA) showed that vegetation types explained only a small portion of variances in species composition of saprophytic (R2 = 0.067, P = 0.004) and symbiotic (R2 = 0.068, P = 0.004) fungal communities. Elevation showed weak effects on saprophytic fungal community (R2 = 0.029, P = 0.001), while this effect on symbiotic fungal community was not significant (R2 = 0.024, P = 0.072). Compositional differences among protected lands were significant for both symbiotic (R2 = 0.148, P = 0.001) and saprophytic (R2 = 0.123, P = 0.002) fungal communities. Interaction network of transect-fungus showed that mountain Rainforests of Jianfengling, Bawangling, and Wuzhishan Nature reserves were characterized by highly diverse symbiotic fungal diversity.
Conclusion: The Hainan Tropical Rainforest National Park hosts highly diverse saprophytic and symbiotic macrofungi. The effects of vegetation types on diversity of fungi vary depending on trophic mode of fungi. Mountain rainforests of Hainan Tropical Rainforest National Park should be treated as conservation priority areas of symbiotic fungi and their host plant.

Key words: national park, macrofungi, saprotroph, symbiotroph, tropical mountain rainforest, plantation forest