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- Title
湖北兰科植物多样性及其区系地理特征.
- Authors
杨林森; 王志先; 王静; 陈金鑫
- Abstract
Vegetation of Hubei is a hotspot of biology study, especially in the western mountains, which is a center of biodiversity in China. On the basis of specimen data, literature and field survey findings, a list of the Orehidaeeae in Hubei was developed. The characteristics of the Orehidaeeae distribution pattern in Hubei, geographical flora and diversity were analyzed, based on the topographic and climatic features of Hubei. Orehidaeeae in Hubei is distributed mainly in southwest, northwest, northeast and southeast mountain areas. Its diversity is the highest in western mountains especially in the areas at the altitude of 900 - 1 200 m while the lowest in Jianghan Plain in central South Hubei. Generally the species richness decreases from the west to the east and from the south to the north. The diversity similarity between southwest and northwest mountains is the highest. There are 141 species, belonging to 54 genera, 15 subtribes, and 5 subfamilies except for subfam. Apostasioideae. Overall, 50.00% of the genera are monotypic, and 33.33% are oligotypic. The florescence is mainly in April to September, and July is the peak of flowering. Among all the species found in Hubei, 40.43% are East-Asian species, and 41.84% are endemic to China. Twenty-five genera are tropical, meanwhile 27 are temperate, with a ratio of 0.93. The tropical species account for 8.51%, and the temperate species account for 91.49%. The study showed that among the Orchidaceae in Hubei, the Eastern Asian flora was the main part, and the Sino-Japanese type was dominant. At the same time, Orchidaceae in Hubei showed high temperate attribute and significant characteristics of the transition between the sub-tropics and the temperate zone. The disjunctive distribution of some rare species in Hubei and Taiwan of China indicates a considerable correlation between the flora of the two areas. Hubei is closely related to Southwest China and the Hengduan mountains in respect of the Orchidaceae flora, and Hubei is the transitional area for the flora exchange with the East China.
- Publication
Guihaia, 2017, Vol 37, Issue 11, p1428
- ISSN
1000-3142
- Publication type
Article
- DOI
10.11931/guihaia.gxzw201612022