Biodiversity Science ›› 2016, Vol. 24 ›› Issue (4): 489-494.doi: 10.17520/biods.2015238

Special Issue: Plant Diversity in the Dry Valleys of Southwest China

• Bioinventory • Previous Article    

Desert vegetation in dry valleys of the upstream of Jinsha River

Yunqin Li1, Fan Du2, *(), Jian Wang2, Ruinian Li2, Yang Liu2   

  1. 1 Yunnan Academy of Forestry, Kunming 650201 .
    2 Faculty of Forestry, Southwest Forestry University, Kunming 650224
  • Received:2015-09-11 Accepted:2016-04-26 Online:2016-05-11
  • Du Fan E-mail:kmdufan@163.com

In order to understand the vegetation characteristics of dry valleys in the upstream of Jinsha River, a field survey was conducted by using transect and sampling surveys with 93 plots from September to October of 2011. Results showed that: (1) There were 111 vascular plant species belonging to 95 genera in 51 families, including 6 ferns belonging to 4 genera in 4 families, and 84 species of dicotyledon belonging to 71 genera in 40 families, 21 species of monocotyledon belonging to 20 genera in 7 families. (2) Five main life forms: Nanophanerophyte, Hemicryptophyte, Chamaephyte, Therophyte and Geophyte, can be recognized, of which Hemicryptophyte was the most dominant, occupying 32.43% and Nanophanerophyte accounted for 27.93% of the total. The dominant leaf size belonged to nanophyll and microphyll, accounted for 60% and 22%, respectively. (3) 93 sampling plots can be classified into 5 community types using a two-way Indicators Species Analysis. The species richness of herbs were higher than shrubs, and the richness of the Formation Vitex microphylla+Leptodermis pilosa var. microphylla was the greatest and also distributed most widely. (4) The vegetation in the dry valleys of the upstream of Jinsha River can be regarded as subtropical desert.

Key words: upstream of Jinsha River, dry valley, desert vegetation, life form, community physiognomy

Fig. 1

Plant life form in dry valleys of the upstream of Jinsha River. H, Hemicryptophyte; N, Nanophanerophyte; T, Therophyte; Ch, Chamaephyte; K, Geophyte."

Fig. 2

Plant leaf form in dry valleys of the upstream of Jinsha River. L, Leptophyll; N, Nanophyll; Mi, Microphyll; Me, Mesophyll; T, Total."

Table 1

Vegetation types in dry valleys of the upstream of Jinsha River"

植被型
Vegetation type
植被亚型
Vegetation subtype
群系 Formation
荒漠
Desert
干旱河谷荒漠
Dry valley vegetation
1. 小叶荆+小叶野丁香群系 Form. Vitex microphylla + Leptodermis pilosa var. microphylla
2. 白刺花+小叶荆群系 Form. Sophora davidii + Vitex microphylla
3. 灰岩木蓝+胶粘香茶菜群系 Form. Indigofera calcicola + Rabdosia glutinosa
4. 小叶荆+小叶杭子梢群系 Form. Vitex microphylla + Campylotropis wilsonii
5. 小叶灰毛莸+胶粘香茶菜群系 Form. Caryopteris forrestii var. minor + Rabdosia glutinosa

Fig. 3

The species richness of plant communities in dry valleys of the upstream of Jinsha River. 1, Form. Vitex microphylla + Leptodermis pilosa var. microphylla; 2, Form. Sophora davidii + Vitex microphylla; 3, Form. Indigofera calcicola + Rabdosia glutinosa; 4, Form. Vitex microphylla + Campylotropis wilsonii; 5, Form. Caryopteris forrestii var. minor + Rabdosia glutinosa"

Fig. 4

The cluster analysis of plant community life form in five areas. 1, Upstream the Jinsha River; 2, Alxa Plateau (He et al, 2010); 3, Middle and lower Jinsha River (Ou & Jin, 1996); 4, Dry-hot valley of Yuanjiang River (Jin, 1999); 5, Middle reaches of Nujiang River (Zhuang et al, 2011)"

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