Biodiversity Science >

2020 , Vol. 28 >Issue 7: 842 - 853

DOI: https://doi.org/10.17520/biods.2019262

Special Feature: Biodiversity of the Luoxiao Mountains

Floristic characteristics and north-south differentiation of seed plants in the Luoxiao Mountains

  • Wanyi Zhao ,
  • Zhongcheng Liu ,
  • Huagu Ye ,
  • Lei Wang ,
  • Gongxi Chen ,
  • Keming Liu ,
  • Xuanhuai Zhan ,
  • Wenbo Liao
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  • 1 State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources, School of Life Sciences, Sun Yat-sen University, Guangzhou 510275
    2 College of Resource Environment and Tourism, Capital Normal University, Beijing 100048
    3 Key Laboratory of Plant Resources Conservation and Utilization, College of Biology and Environmental Sciences, Jishou University, Jishou, Hunan 416000
    4 College of Life Sciences, Hunan Normal University, Changsha 410081
    5 Key Laboratory of Plant Ex-situ Conservation and Utilization, Jiangxi Province, Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, Jiangxi 332900

Received date: 2019-08-20

  Accepted date: 2020-02-20

  Online published: 2020-08-28

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Abstract

This paper studied the flora of seed plants in the Luoxiao Mountains and revealed the transitional characteristics of five moderate mountains flora from north to south. The results indicated that 4,314 wild seed plants belonging to 1,107 genera and 179 families are distributed in the Luoxiao Mountains. (1) The Luoxiao Mountains flora consists of 25 families and 465 genera which distribute only one species, 61 oligotypic families and 432 oligotypic genera, presenting the relict of flora and intimate exchange between local floristic components and typical tropical and temperate components. (2) The families geographical areal-types were classified into 10 types, included 83 tropical families and 40 temperate families, accounting for 67.48% and 32.52%, respectively of the non-widespread families. The genus areal-types were classified into 15 types, including 484 tropical genera and 534 temperate genera accounting for 52.46% and 47.54%, respectively of the non-widespread genera. The distribution patterns of genera are abundant with pantropic areal-type, tropical areal-type, North temperate areal-type, and East Asia areal-type, which reflect that the flora of the Luoxiao Mountains, the paleo-tropical flora and temperate tertiary flora are strongly interrelated. (3) The floristic compositions amongst five mountains in the Luoxiao Mountains have marked spatial heterogeneity from north to south, which the R/T value, i.e ratio of tropical genera to temperate genera, increases gradually. The Mufu Mountains experienced stronger temperate elements, which are related to Central China flora, while the Wanyang Mountains and the Zhuguang Mountains contain stronger tropical elements. Climate fluctuations may be the main reason for the formation of the modern floristic distribution pattern in the region.

Key words： the Luoxiao Mountains; flora of seed plants; areall-types; geographical substitute

Cite this article

Wanyi Zhao , Zhongcheng Liu , Huagu Ye , Lei Wang , Gongxi Chen , Keming Liu , Xuanhuai Zhan , Wenbo Liao . Floristic characteristics and north-south differentiation of seed plants in the Luoxiao Mountains[J]. Biodiversity Science, 2020 , 28(7) : 842 -853 . DOI: 10.17520/biods.2019262

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