草业学报 ›› 2022, Vol. 31 ›› Issue (8): 61-71.DOI: 10.11686/cyxb2021306
收稿日期:
2021-08-10
修回日期:
2021-09-22
出版日期:
2022-08-20
发布日期:
2022-07-01
通讯作者:
郭正刚
作者简介:
E-mail: guozhg@lzu.edu.cn基金资助:
Hao-hao QI1(), Xiao-pan PANG1, Su ZHOU2, Zheng-gang GUO1()
Received:
2021-08-10
Revised:
2021-09-22
Online:
2022-08-20
Published:
2022-07-01
Contact:
Zheng-gang GUO
摘要:
高原鼠兔喜欢刈割茂密高寒草甸中高大植物而影响植物群落内的种间关系。采用方差比率法、χ2检验和Spearman秩相关分析相结合的方法,分析了高原鼠兔刈割行为对高山嵩草草甸植物群落种间关联的影响。结果表明:高原鼠兔刈割会促进植物群落的种间总体联结从不显著正关联变为显著负关联,降低植物群落稳定性,减少植物群落内正关联和正相关的种对数量,增加负关联、无关联和负相关的种对数量。而综合χ2检验结果、AC值和OI指数,洞口植物群落大部分种对的种间关联均不显著,种间联结程度不强。这表明χ2检验和Spearman秩相关分析能够评价小型草食动物对植物群落种间关联的影响,为全面解析高原鼠兔整体干扰驱动植物群落结构变化提供了基础信息。
齐昊昊, 庞晓攀, 周俗, 郭正刚. 高原鼠兔刈割对青海湖流域高寒草甸植物种间关联的影响[J]. 草业学报, 2022, 31(8): 61-71.
Hao-hao QI, Xiao-pan PANG, Su ZHOU, Zheng-gang GUO. Effects of clipping by plateau pika on plant interspecific associations in alpine meadows in the Qinghai Lake Region[J]. Acta Prataculturae Sinica, 2022, 31(8): 61-71.
编号 Code | 物种 Species | 重要值Importance value | 编号 Code | 物种 Species | 重要值Importance value | ||
---|---|---|---|---|---|---|---|
对照Control | 刈割Clipping | 对照Control | 刈割Clipping | ||||
1 | 高山嵩草K. pygmaea | 26.51 | 23.83 | 14 | 二裂委陵菜P. bifurca | 5.12 | 3.09 |
2 | 长毛风毛菊S. hieracioides | 9.11 | 10.49 | 15 | 雪地黄耆Astragalus nivalis | 4.69 | 4.06 |
3 | 高原早熟禾P. alpigena | 8.80 | 8.02 | 16 | 车前Plantago asiatica | 4.48 | 4.21 |
4 | 高山豆T. himalaica | 8.71 | 8.54 | 17 | 达乌里秦艽Gentiana dahurica | 4.07 | 3.93 |
5 | 披针叶黄华Thermopsis lanceolata | 7.62 | 3.30 | 18 | 臭蒿Artemisia hedinii | 3.63 | 2.98 |
6 | 肉果草Lagotis tibetica | 7.52 | 8.12 | 19 | 冷蒿Artemisia frigida | 3.45 | 3.02 |
7 | 紫花针茅Stipa purpurea | 6.95 | 5.32 | 20 | 矮火绒草Lagotis nanum | 3.39 | 4.31 |
8 | 直梗高山唐松草Thalictrum alpinum | 6.28 | 7.37 | 21 | 珠芽蓼Polygonum viviparum | 3.33 | 3.70 |
9 | 黄花棘豆Oxytropis ochrocephala | 6.04 | 4.59 | 22 | 西伯利亚蓼P. sibiricum | 3.27 | 2.68 |
10 | 乳白香青Anaphalis lactea | 5.84 | 4.52 | 23 | 蒲公英Taraxacum mongolicum | 3.26 | 3.07 |
11 | 莓叶委陵菜Potentilla fragarioides | 5.55 | 5.47 | 24 | 三脉梅花草Parnassia trinervis | 3.23 | 2.84 |
12 | 青藏苔草Carex moorcroftii | 5.39 | 6.51 | 25 | 老鹳草Geranium wilfordii | 3.01 | 3.28 |
13 | 小花草玉梅Anemone rivularis | 5.37 | 5.33 |
表1 高山嵩草草甸种群25个物种的平均重要值
Table 1 The mean importance value of 25 main species in a K. pygmaea meadow populations (%)
编号 Code | 物种 Species | 重要值Importance value | 编号 Code | 物种 Species | 重要值Importance value | ||
---|---|---|---|---|---|---|---|
对照Control | 刈割Clipping | 对照Control | 刈割Clipping | ||||
1 | 高山嵩草K. pygmaea | 26.51 | 23.83 | 14 | 二裂委陵菜P. bifurca | 5.12 | 3.09 |
2 | 长毛风毛菊S. hieracioides | 9.11 | 10.49 | 15 | 雪地黄耆Astragalus nivalis | 4.69 | 4.06 |
3 | 高原早熟禾P. alpigena | 8.80 | 8.02 | 16 | 车前Plantago asiatica | 4.48 | 4.21 |
4 | 高山豆T. himalaica | 8.71 | 8.54 | 17 | 达乌里秦艽Gentiana dahurica | 4.07 | 3.93 |
5 | 披针叶黄华Thermopsis lanceolata | 7.62 | 3.30 | 18 | 臭蒿Artemisia hedinii | 3.63 | 2.98 |
6 | 肉果草Lagotis tibetica | 7.52 | 8.12 | 19 | 冷蒿Artemisia frigida | 3.45 | 3.02 |
7 | 紫花针茅Stipa purpurea | 6.95 | 5.32 | 20 | 矮火绒草Lagotis nanum | 3.39 | 4.31 |
8 | 直梗高山唐松草Thalictrum alpinum | 6.28 | 7.37 | 21 | 珠芽蓼Polygonum viviparum | 3.33 | 3.70 |
9 | 黄花棘豆Oxytropis ochrocephala | 6.04 | 4.59 | 22 | 西伯利亚蓼P. sibiricum | 3.27 | 2.68 |
10 | 乳白香青Anaphalis lactea | 5.84 | 4.52 | 23 | 蒲公英Taraxacum mongolicum | 3.26 | 3.07 |
11 | 莓叶委陵菜Potentilla fragarioides | 5.55 | 5.47 | 24 | 三脉梅花草Parnassia trinervis | 3.23 | 2.84 |
12 | 青藏苔草Carex moorcroftii | 5.39 | 6.51 | 25 | 老鹳草Geranium wilfordii | 3.01 | 3.28 |
13 | 小花草玉梅Anemone rivularis | 5.37 | 5.33 |
处理 Treatment | 方差比率 Variance ratio | 检验统计量 Statistic W | χ2临界值 χ2 threshold value | 结果 Result |
---|---|---|---|---|
对照Control | 1.09 | 32.70 | (18.49, 43.77) | 不显著正关联Insignificantly positive association |
刈割Clipping | 0.61 | 18.30 | (18.49, 43.77) | 显著负关联Significantly negative association |
表2 群落总体联结性变化
Table 2 Dynamics of the overall interspecific association in K. pygmaea meadow
处理 Treatment | 方差比率 Variance ratio | 检验统计量 Statistic W | χ2临界值 χ2 threshold value | 结果 Result |
---|---|---|---|---|
对照Control | 1.09 | 32.70 | (18.49, 43.77) | 不显著正关联Insignificantly positive association |
刈割Clipping | 0.61 | 18.30 | (18.49, 43.77) | 显著负关联Significantly negative association |
图2 χ2检验半矩阵▲: 极显著正关联Extremely significant positive association (P<0.01), χ2>6.635; ◆: 显著正关联Significant positive association (0.01≤P≤0.05), 3.841≤χ2≤6.635; ●: 不显著正关联Insignificantly positive association (P>0.05), χ2<3.841; △: 极显著负关联Extremely significant negative association (P<0.01), χ2>6.635; ◇: 显著负关联Significant negative association (0.01≤P≤0.05), 3.841≤χ2≤6.635; △: 不显著负关联Insignificantly negative association (P>0.05), χ2<3.841; ★: 无关联No association.
Fig.2 Semi-matrix of interspecific association χ2 correction test
图5 Spearman 秩相关系数半矩阵▲极显著正相关Extremely significant positive correlation (P<0.01); ■显著正相关Significant positive correlation (0.01≤P≤0.05); +不显著正相关Insignificantly positive correlation (P>0.05); △极显著负相关Extremely significant negative correlation (P<0.01); □显著负相关Significant negative correlation (0.01≤P≤0.05); - 不显著负相关Insignificantly negative correlation (P>0.05); ? 相关不显著No significant correlation.
Fig.5 Semi-matrix of Spearman’s rank correlation coefficients
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