COMMUNITY CHARACTERISTICS OF STIPA PURPUREASTEPPE IN SOURCE REGIONS OF CHANGJIANG AND HUANGHE RIVERS, CHINA

doi:10.3773/j.issn.1005-264x.2008.05.016

Abstract

Abstract:

Aims Stipa purpurea steppe is one of the most important ecosystems in source regions of Changjiang (Yangtse) and Huanghe (Yellow) Rivers. Our objective was to determineStipa purpureacommunity characteristics.

Methods Typical Stipa purpurea communities distributed in Maduo, Qumalai and Tongde of Qinghai Province were selected as three sampling locations and sampled using 33 sampling lines for a total of 330 samples. Analyses used PCORD, SPSS and EXCEL software.

Important findings Species composition of the investigated community was simple, with 96 species grouped into 58 genera and 23 families. North Temperate genera were dominant. We identified three associations: Stipa purpurea+Potentilla bifurcaassociation (Ⅰ),Stipa purpurea +Carex parva association (Ⅱ), andStipa purpurea+Poa indattenuata association (Ⅲ). These associations have different characteristics that are analyzed in this paper. Comparability analysis show that association Ⅰ is much more similar to association Ⅱ than Ⅲ, but the importance value ofS. purpureais much higher than any other species in all associations. The community distribution of S. purpureasteppe is heterogeneous at coarse scale and regionally homogeneous at fine scale. The correlations are all significant among evenness, Simpson, Shannon-Wiener indices and latitude. The curves of evenness, Simpson and Shannon-Wiener indices changed similarly in samples. Species diversity for the associations was Ⅱ>Ⅲ>Ⅰ.

Key words: source regions of Changjiang and Huanghe River, Stipa purpurea steppe, agglomerative clustering, community characteristics, α diversity

YUE Peng-Peng, LU Xue-Feng, YE Run-Rong, ZHOU Yu-Bi, YANG Shi-Bing, ZHANG Chang- Xian, PENG Min. COMMUNITY CHARACTERISTICS OF STIPA PURPUREASTEPPE IN SOURCE REGIONS OF CHANGJIANG AND HUANGHE RIVERS, CHINA[J]. Chin J Plant Ecol, 2008, 32(5): 1116-1125.

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Figures/Tables 10

References 31

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项目 Items	样地1 Sampling plot 1	样地2 Sampling plot 2	样地3 Sampling plot 3
行政区域 Location	玛多 Maduo	曲麻莱 Qumalai	同德 Tongde
样线号 Sampling line No.	s1~s11	s12~s22	s23~s33
海拔 Altitude (m)	4 210~4 355	4 290~4 567	3 343~3 555
经度 Longitude	97°40'57.7" N~ 98°19'42.3" N	95°50'40.5" N~ 95°53'39.8" N	100°54'20.4" N~ 101°13'32.7" N
纬度 Latitude	34°50'7.2" E~ 35°06'39.6" E	34°07'39.8" E~ 34°08'54.6" E	35°15'56.4" E~ 35°18'17.5" E
气温≥5 ℃积温 (℃) Accumulate temperature≥5 ℃	678.2	902.3	1 662
年降水量 (mm) Average annual precipitation	311.0	429.4	902.3
土壤类型 Soil type	高山草甸土 Alpine meadow soil	高山草甸土、高山草原土 Alpine meadow soil, alpine steppe soil	栗钙土 Chestnut soil

项目 Items	样地1 Sampling plot 1	样地2 Sampling plot 2	样地3 Sampling plot 3
行政区域 Location	玛多 Maduo	曲麻莱 Qumalai	同德 Tongde
样线号 Sampling line No.	s1~s11	s12~s22	s23~s33
海拔 Altitude (m)	4 210~4 355	4 290~4 567	3 343~3 555
经度 Longitude	97°40'57.7" N~ 98°19'42.3" N	95°50'40.5" N~ 95°53'39.8" N	100°54'20.4" N~ 101°13'32.7" N
纬度 Latitude	34°50'7.2" E~ 35°06'39.6" E	34°07'39.8" E~ 34°08'54.6" E	35°15'56.4" E~ 35°18'17.5" E
气温≥5 ℃积温 (℃) Accumulate temperature≥5 ℃	678.2	902.3	1 662
年降水量 (mm) Average annual precipitation	311.0	429.4	902.3
土壤类型 Soil type	高山草甸土 Alpine meadow soil	高山草甸土、高山草原土 Alpine meadow soil, alpine steppe soil	栗钙土 Chestnut soil

科 Family	种数 No. of species	占总种数的百分比 Ratio (%)
菊科 Compositae	19	19.79
禾本科 Gramineae	16	16.67
豆科 Leguminosae	11	11.46
莎草科 Cyperaceae	9	9.38
玄参科 Scrophulariaceae	5	5.21
藜科 Chenopodiaceae	4	4.17
龙胆科 Gentianaceae	4	4.17
毛莨科 Ranunculaceae	4	4.17
蔷薇科 Rosaceae	4	4.17
其它14科 Other 14 families	29	20.83

科 Family	种数 No. of species	占总种数的百分比 Ratio (%)
菊科 Compositae	19	19.79
禾本科 Gramineae	16	16.67
豆科 Leguminosae	11	11.46
莎草科 Cyperaceae	9	9.38
玄参科 Scrophulariaceae	5	5.21
藜科 Chenopodiaceae	4	4.17
龙胆科 Gentianaceae	4	4.17
毛莨科 Ranunculaceae	4	4.17
蔷薇科 Rosaceae	4	4.17
其它14科 Other 14 families	29	20.83

分布区类型 Areal-types	属数 No. of genera	占总属的百分比 Ratio (%)
北温带分布 North temperate	28	48.28
世界分布 Cosmopolitan	9	15.52
旧世界温带分布 Old world temperate	5	9.62
温带亚洲分布 Temperate of Asia	5	8.62
东亚分布 East Asia	5	8.62
地中海区、西亚至中亚分布 Mediterranea, West Asia to Central Asia	2	3.45
中国特有 Endemic to China	2	3.45
中亚分布 Central Asia	1	1.72
泛热带分布 Pantropic	1	1.72
合计 Total	58	100.0