Biodiv Sci ›› 2019, Vol. 27 ›› Issue (11): 1251-1259.DOI: 10.17520/biods.2019177

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Diversity and biogeographical characteristics of lycophytes and ferns in Mufu Mountains, China

Hongli Ji,Xuanhuai Zhan(),Li Zhang,Yansong Peng,Saixia Zhou,Wan Hu   

  1. Key Laboratory of Plant Ex-situ Conservation and Utilization, Jiangxi Province, Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, Jiangxi 332900
  • Received:2019-05-27 Accepted:2019-09-10 Online:2019-11-20 Published:2020-01-17
  • Contact: Zhan Xuanhuai

Abstract:

Field investigation and herbarium specimen information revealed that 261 species of lycophytes and ferns, belonging to 72 genera and 26 families were found in Mountain Mufu. It was characterized by Dryopteris-Asplenium flora with strong transiting distribution from east to west. The species richness was the highest (224 species) in Mount Lushan and the species density (2.09 species/km 2) was the highest in Mount Mufu. Besides Dryopteris included 29 species, Asplenium, Lepisorus and Selaginella were more abundant in Mount Lushan, Mount Jiugong and Mount Mufu, respectively. It shared only 95 common species among these three mountains, and the phenomena of neo-endemic genera and species was obvious. There were high restrictions on differentiation of genera and species in this area, which showed that monotypic family/genus and depauperate family/genus account for more than 60% of the total families and 80% of the total genera. The ratios of tropical elements to temperate elements (R/T) were 2.6 and 2.3 at the family and the generic level with tropical elements. Compared with the mountains in the same latitude zone, the R/T value at generic level in the junction zone of mid-subtropics and north subtropics was between 2.18-2.36. The R/T value was 0.2 at specific level with obvious temperate elements, which was an important component of the temperate flora of Luoxiao Mountains. The flora of lycophytes and ferns in this area was closely related to the flora of East and South China, showing the intersection of the two floristic components.

Key words: Mufu Mountains, diversity of pteridophytes, subtropical mountain, biogeography, R/T value