| 高原鼠兔有效洞口数密度对高山嵩草草甸植物种间联结性的影响 |
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| 引用本文： | 庞晓攀,王倩,贾婷婷,李倩倩,郭正刚.高原鼠兔有效洞口数密度对高山嵩草草甸植物种间联结性的影响[J].草业学报,2015,24(5):224-230. |
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| 作者姓名： | 庞晓攀 王倩 贾婷婷 李倩倩 郭正刚 |
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| 作者单位： | 兰州大学草地农业科技学院,草地农业生态系统国家重点实验室,甘肃 兰州 730020 |
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| 基金项目： | 国家自然科学基金，国家行业(农业)公益项目，国家级大学生创新创业项目(821003092)资助。 |
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| 摘 要： | 高原鼠兔有效洞口数密度变化会引起高山嵩草草甸植物组分变化,而且引起种间关系的改变。研究了高原鼠兔有效洞口数密度对高山嵩草草甸植物种间联结性的影响。结果表明,随高原鼠兔有效洞口数密度增加,原优势种高山嵩草优势度降低,而原伴生种达乌里秦艽和小花草玉梅等植物的优势度却逐渐增加;植物群落内主要物种间的总体联结性从有效洞口数密度小于或等于224个/hm2时的正关联,转变为有效洞口数密度超过224个/hm2时的负关联;高山嵩草和青藏苔草的联结性从有效洞口数密度≤224个/hm2时的正关联,转变为有效洞口数密度超过224个/hm2时的负关联,而密花香薷和乳浆大戟、乳浆大戟和黄花棘豆的联结性则相反。这说明高原鼠兔有效洞口数密度变化改变了高山嵩草草甸植物种间的总体联结性,有效洞口数密度为224个/hm2时种间联结性最强,群落最稳定。
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| 关 键 词： | 有效洞口数密度 种间联结 高山嵩草草甸 高原鼠兔 |
| 收稿时间： | 2014-08-21; |
Effect of burrow entrance densities of plateau pika (Ochotona curzoniae)on interspecific association in Kobresia pygmaea meadow |
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| PANG Xiao-Pan,WANG Qian,JIA Ting-Ting,LI Qian-Qian,GUO Zheng-Gang.Effect of burrow entrance densities of plateau pika (Ochotona curzoniae)on interspecific association in Kobresia pygmaea meadow[J].Acta Prataculturae Sinica,2015,24(5):224-230. |
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| Authors: | PANG Xiao-Pan WANG Qian JIA Ting-Ting LI Qian-Qian GUO Zheng-Gang |
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| Institution: | State Key Laboratory of Grassland Agro-ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China |
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| Abstract: | Changes in the active burrow entrance densities of plateau pika (Ochotona curzoniae) can result in changes in the botanical composition in Kobresia pygmaea meadow which can influence interspecific relationships in the meadow. A field survey was carried out to determine the effect of active plateau pika active burrow entrance densities on the interspecific association between the major plant species in K. pygmaea meadow. This study showed that the dominance index for K. pygmaea (dominant species), decreased, while the dominance index of associated species including Gentiana dahurica and Anemone rivularis var. flore-minors increased as burrow density increased. The overall interspecific association among the main plant species of the K. pygmaea alpine meadow transformed from significantly positive association at 128 and 224 burrow entrances per ha to a negative association at 368 and 544 burrow entrances per ha. The relationship between K. pygmaea and Carex moorcroftii transformed from positive association at 128 and 224 active burrow entrances per ha to negative association at 368 and 544 active burrow entrances per ha, while associations between Euphorbia esula and Elsholtzia densa, and between Oxytropis ochrocephala and E. esula were negative at 128 and 224 active burrow entrances per ha but positive at 368 and 544 burrow entrances per ha. These results suggested that the active burrow entrance densities regulated the overall interspecific association among the main plant species in K. pygmaea alpine meadow, and the interspecific association among the main plant species was strongest and the stability of the alpine meadow community was greatest at 224 active burrow entrances per ha. |
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| Keywords: | active burrow entrance densities interspecific association Kobresia pygmaea meadow plateau pika |
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