Biodiversity Science ›› 2012, Vol. 20 ›› Issue (4): 517-521.doi: 10.3724/SP.J.1003.2012.05215

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The pteridophyte diversity of the Danxia landform in Hunan Province, China

Yuehong Yan1, 2*, Zuxia He1, 2, Qixia Ma1, Xile Zhou1, Qiyong Lu3   

  1. 1Chen Shan Botanical Garden (Shanghai Chenshan Plant Science Research Center, Chinese Academy of Sciences), Shanghai 201602

    2School of Life Science, Hunan University of Science and Technology, Xiangtan, Hunan 411201

    3Tongdao County Forestry Bureau, Tongdao, Hunan 418500
  • Received:2011-11-28 Revised:2012-03-28 Online:2012-09-12
  • Yuehong Yan E-mail:yan.yh@126.com

The Danxia landform is a unique landscape type with a high level of floral endemism. Herein, we report the fern flora of Danxia landform in Hunan Province. We complete comprehensive surveys of pteridophytes in the Danxia landform areas of Hunan between 2007 and 2010. We report an annotated species checklist in this paper, including 183 species and 66 genera in 31 families. Nine species, including Hypolepis polypodioides, Notholaena hirsuta, Adiantum juxtapositum, Allantodia baishanzuensis, A. succulenta, Asplenium ritoense, Polystichum deltodon var. henryi, P. gymnocarpium, P. simplicipinnum and Ctenitis dingnanensi, are reported as new records to Hunan. The families with more than 10 species include the Dryopteridaceae, Athyriaceae, Polypodiaceae, Thelypteridaceae, Selaginellaceae and Aspleniaceae, and the genera with more than 8 species are Dryopteris, Selaginella, Asplenium, Allantodia and Pteris. This list not only includes calciphilous ferns, but also acidophilous and endemic ferns restricted to the Danxia landform (e.g., A. juxtapositum and P. gymnocarpium). It is hypothesized that the fern flora of the Danxia landform may be an intergradation type between Karst landform and granite landform. Lastly, we provide recommendations for the longterm protection of the floral diversity of the Danxia landform.

Key words: seed predation, seed dispersal, plant regeneration, coevolution, mutualism, community succession, ecosystem function, biodiversity

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