A vertical gradient analysis of the flora of Dalaoling Mountain in the Three Gorges region, China

doi:10.7523/j.issn.2095-6134.2001.3.006

›› 2001, Vol. 39 ›› Issue (3): 260-268.DOI: 10.7523/j.issn.2095-6134.2001.3.006

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A vertical gradient analysis of the flora of Dalaoling Mountain in the Three Gorges region, China

SHEN Ze-Hao, ZHANG Xin-Shi, JIN Yi-Xing

Received:1900-01-01 Revised:1900-01-01 Online:2001-05-10
Contact: SHEN Ze-Hao

Abstract

Abstract:

To explore its floristic compositional characteristics, and the ecological significance of

the vertical gradient pattern of the Dalaoling Mountain flora in the Three Gorges region, China, this

flora was investigated along a vertical vegetation transect. The structural characteristics of the flora

and the altitudinal distribution pattern of its floristic components were analyzed, the floristic equilibrium point (FEP) was detected, and the effects of the mountain climate on the vertical variation of floristic composition were studied using clustering method. The results are summarized as follows:

1) The flora of Dalaoling Mountain is of a temperate nature in floristic composition, with a high en-

demism in Eastern-Asian and Chinese elements, but exhibits some historical connections with tropi-

cal flora. 2) The areal-types of the genera are tropical, temperate, Mediterranean to Central Asian

and Eastern Asian. The vertical distribution patterns of the 4 types are different from each other.

The floristic equilibrium point between the tropical elements and the temperate ones is roughly locat-

ed at the altitude of 650 m. 3) The clustering analysis of the floristic composition and the species

number of the genera showed that the vertical distribution pattern of floristic elements and species

number of the genera corresponds with that of the mountain climate and vertical vegetation spectrum.

Key words: Dalaoling Mountain in the Three Gorges region, Floristic analysis, Geographical ele-Ments, Vertical gradient, Quantitative classification

SHEN Ze-Hao, ZHANG Xin-Shi, JIN Yi-Xing. A vertical gradient analysis of the flora of Dalaoling Mountain in the Three Gorges region, China[J]. , 2001, 39(3): 260-268.

A vertical gradient analysis of the flora of Dalaoling Mountain in the Three Gorges region, China

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