湖南省德夯风景名胜区种子植物区系研究北大核心CSCD

该研究在对德夯风景名胜区种子植物进行多次野外调查及查阅相关资料文献的基础上,从科、属、种层面、不同特殊生境类型,并与邻近地区进行比较,综合分析探讨德夯的植物区系特征,深入揭示该区植物区系的性质和地位,为该区自然资源的保护和管理以及持续利用提供科学依据。结果表明:(1)德夯种子植物类群丰富,该区共有野生种子植物154科710属1 626种,分别占武陵山地区种子植物科、属、种总数的94.48%、83.43%、54.00%,分别占湖南省种子植物科、属、种总数的73.33%、54.20%、33.46%。(2)该区种子植物区系地理成分复杂,科含12个分布区类型,属含14个,种含15个,科和属的地理成分均以泛热带分布型所占比例最高,种的地理成分以中国特有分布型所占比例最高;特有现象明显,该区含7个东亚特有科、2个中国特有科,27个中国特有属,588个中国特有种,其中含39个华中特有种,29个武陵山地区特有种和6个德夯特有种。(3)该区植物区系成分随生境不同出现分化,台地、悬崖、谷地3种代表性生境区系成分差异明显,和邻近的壶瓶山、小溪、乌龙山3个地区具有较高的相似性。总体上,德夯风景名胜区植物区系具有东亚植物区系特征,在武陵山地区植物区系中具有重要地位。

Study on the Flora of Seed Plants in Dehang Scenic Spot, Hunan Province

Based on field investigation and relevant literatures, this study has comprehensively analyzed and discussed the characteristics of the seed plants flora in Dehang Scenic spot from the aspects of family, genus and species. Meanwhile, we revealed the nature and status of the flora via comparison between plants grown in different special eco environment types and those grown in adjacent regions. The results provide an important basis for management and sustainable utilization of natural resources in Dehang Scenic spot. The results showed that: (1) there was high species diversity of Spermatophyta in Dehang. Our investigation showed that there were 1 626 species of wild seed plants belonging to 154 families, 710 genera. These plants accounted for 94.48%, 83.43% and 54.00% of seed plants families, genera and species in the Wuling mountain area, and for 73.33%, 54.20% and 33.46% in Hunan Province. (2) The floristic analysis showed that the geographical element of seed plants in Dehang was complex. There are 12 area types of families, 14 area types of genera, and 15 area types of species in this area. The area type of families and genera was mostly pan tropic. For species, the number of endemic to China was the largest. Meanwhile, the flora of Dehang exhibited obvious endemism. The area contained 7 endemic families in East Asia, 2 Chinese endemic families, 27 Chinese endemic genera, and 588 Chinese endemic species, including 39 endemic species in central China, 29 endemic species in the Wulingshan region, and 6 endemic species in Dehang. (3) The floristic components of this area differentiated with different habitats. There were obvious differences in floristic components among three representative habitats: platform, cliff and valley. The flora of Dehang were similar to the neighboring Huping Mountain, Xiaoxi and Oolong Mountain. Overall, the flora of seed plants in Dehang Scenic spot has the characteristics of East Asian flora, and it has an important place in the flora of the Wulingshan region.