Comparative analysis of inter-specific association within the Stipa grandis-S. krylovii community in typical steppe of Inner Mongolia, China

doi:10.3773/j.issn.1005-264x.2010.09.002

Abstract

Abstract:

Aims Xilin Gol steppe of Inner Mongolia is located in the typical steppe area in China, but some areas have been invaded by desert steppe species such as Stipa gobica, with which S. grandis and S. krylovii mixed to form three types of patches (Stipa grandis, S. krylovii and S. gobica) within the community. It is not known what kinds of relationships exist among the dominant species in the community. Our objective was to investigate how the dominant species in the three patches interact with each other and with other species.

Methods Field data were collected in August during 2007 to 2009 in the three different kinds of Stipa patches. Ten plots were set in each patch type and placed at random within the site, giving a total of 90 plots in three years. The 2 × 2 contingency table, variance ratio (VR) of the overall association, Pearson coefficient and Spearman rank correlation coefficient were used in quantitative analysis of the interspecific associations among the 24 plant species in the three kinds of patches.

Important findings The overall inter-specific association among 24 plant species of the community showed no correlation, indicating that species association was weak. The distribution and formation patterns of patches, which were possibly due to interactions among interference, competition, soil environment and plant function, were verified by analyzing species correlation in the three kinds of Stipa patches. These results provide evidence for the theory of species association. We noted that the nature (positive or negative) or degree of association varied with different kinds of patches. According to their adaptability to the environment and relationships between plants and environment, the 24 species were divided into three ecological species groups.

Key words: Correlation coefficient test, inter-specific association, patches distribution, steppe community, typical steppe

LIU Jue-Hong, GAO Hui, ZHANG Li-Hong, CHEN Li-Ping, ZHAO Nian-Xi, GAO Yu-Bao. Comparative analysis of inter-specific association within the Stipa grandis-S. krylovii community in typical steppe of Inner Mongolia, China[J]. Chin J Plant Ecol, 2010, 34(9): 1016-1024.

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URL: https://www.plant-ecology.com/EN/10.3773/j.issn.1005-264x.2010.09.002

https://www.plant-ecology.com/EN/Y2010/V34/I9/1016

Figures/Tables 5

References 36

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编号 Code	物种 Species	平均重要值 Mean importance value (%)
1	银灰旋花 Convolvulus ammannii	16.89
2	猪毛菜 Salsola collina	15.48
3	大针茅 Stipa grandis	10.59
4	克氏针茅 Stipa krylovii	10.40
5	野韭 Allium ramosum	8.84
6	羊草 Leymus chinensis	6.86
7	戈壁针茅 Stipa gobica	5.53
8	双齿葱 Allium bidentatum	5.23
9	木地肤 Kochia prostrata	4.65
10	并头黄芩 Scutellaria scordlifloia	3.98
11	刺穗藜 Chenopodium aristatum	3.09
12	知母 Anemarrhena asphodeloides	2.60
13	糙隐子草 Cleistogenes squarros	1.91
14	冰草 Agropyron cristatum	0.89
15	黄囊薹草 Carex korshinskyi	0.68
16	天门冬 Asparagus cochinchinensis	0.62
17	狭叶锦鸡儿 Caragana stenophyll	0.56
18	无芒隐子草 Cleistogenes songorica	0.44
19	细叶葱 Allium tenuissimum	0.29
20	乳白花黄芪 Astragalus galactites	0.12
21	细叶鸢尾 Iris tenuifolia	0.11
22	达乌里胡枝子 Lespedeza davurica	0.10
23	灰绿藜 Chenopodium glaucum	0.09
24	狗尾草 Setaria viridi	0.07

编号 Code	物种 Species	平均重要值 Mean importance value (%)
1	银灰旋花 Convolvulus ammannii	16.89
2	猪毛菜 Salsola collina	15.48
3	大针茅 Stipa grandis	10.59
4	克氏针茅 Stipa krylovii	10.40
5	野韭 Allium ramosum	8.84
6	羊草 Leymus chinensis	6.86
7	戈壁针茅 Stipa gobica	5.53
8	双齿葱 Allium bidentatum	5.23
9	木地肤 Kochia prostrata	4.65
10	并头黄芩 Scutellaria scordlifloia	3.98
11	刺穗藜 Chenopodium aristatum	3.09
12	知母 Anemarrhena asphodeloides	2.60
13	糙隐子草 Cleistogenes squarros	1.91
14	冰草 Agropyron cristatum	0.89
15	黄囊薹草 Carex korshinskyi	0.68
16	天门冬 Asparagus cochinchinensis	0.62
17	狭叶锦鸡儿 Caragana stenophyll	0.56
18	无芒隐子草 Cleistogenes songorica	0.44
19	细叶葱 Allium tenuissimum	0.29
20	乳白花黄芪 Astragalus galactites	0.12
21	细叶鸢尾 Iris tenuifolia	0.11
22	达乌里胡枝子 Lespedeza davurica	0.10
23	灰绿藜 Chenopodium glaucum	0.09
24	狗尾草 Setaria viridi	0.07

斑块类型 Type of patches	方差比率 Variance ratio	检验统计量 Statistic W	χ²临界值 [χ²_0.05,_N , χ²_0.95,_N]	结果 Results
大针茅斑块 S. grandis patches	0.971 4	29.141 9	(17.71, 42.56)	轻微负关联 Non negative correlation
克氏针茅斑块 S. krylovii patches	0.921 2	27.637 1	(17.71, 42.56)	轻微负关联 Non negative correlation
戈壁针茅斑块 S. gobica patches	1.022 3	30.670 0	(17.71, 42.56)	轻微正关联 Non positive correlation
总体 Total	1.070 2	96.313 6	(68.25, 111.02)	轻微正关联 Non positive correlation

斑块类型 Type of patches	方差比率 Variance ratio	检验统计量 Statistic W	χ²临界值 [χ²_0.05,_N , χ²_0.95,_N]	结果 Results
大针茅斑块 S. grandis patches	0.971 4	29.141 9	(17.71, 42.56)	轻微负关联 Non negative correlation
克氏针茅斑块 S. krylovii patches	0.921 2	27.637 1	(17.71, 42.56)	轻微负关联 Non negative correlation
戈壁针茅斑块 S. gobica patches	1.022 3	30.670 0	(17.71, 42.56)	轻微正关联 Non positive correlation
总体 Total	1.070 2	96.313 6	(68.25, 111.02)	轻微正关联 Non positive correlation