槭叶铁线莲(Clematis acerifolia Maxim.)群落物种生态位研究

Abstract

PDF HTML阅读 XML下载 导出引用 引用提醒 槭叶铁线莲(Clematis acerifolia Maxim.)群落物种生态位研究 DOI: 10.5846/stxb202009142401 作者: 作者单位: 作者简介: 通讯作者: 中图分类号: 基金项目: 国家林业和草原长期科研基地项目（2020132516） Species niche of Clematis acerifolia Maxim. community Author: Affiliation: Fund Project: 摘要 | 图/表 | 访问统计 | 参考文献 | 相似文献 | 引证文献 | 资源附件 | 文章评论 摘要:槭叶铁线莲（Clematis acerifolia）为太行山特有植物，但数量稀少且分布零散，其生存状况受到学者和政府部门的高度关注。本文通过对河北省易县葫芦峪沟谷新发现的槭叶铁线莲群落的典型样地调查，以物种重要值作为生态位计量指标，对各物种生态位宽度、生态位重叠和生态位相似性进行了定量分析，对槭叶铁线莲的生存安全状况进行了评估。结果表明：在调查样地中共记录到14科15属17种植物，群落物种组成较为简单，槭叶铁线莲在大部分调查样地中的重要值最大，占据优势地位，其他物种重要值相对较低；群落内所有物种中，槭叶铁线莲的生态位宽度最大（Bi=6.264），绒毛绣线菊（Spiraea dasyantha）次之（Bi=5.144），其他种类较小；所有物种组成的136个种对中，生态位完全重叠（Qik=1）、重叠程度较高（0.5≤Qik<1）和重叠程度较低（Qik<0.5）的种对比例分别为8.09%、16.91%和75.00%，生态位完全相似（Cik=1）、相似程度较高（0.5≤Cik<1）和相似程度较低（Cik<0.5）的种对比例分别为8.09%、5.88%和86.03%，大部分物种之间生态位重叠程度和相似性都处于较低水平；槭叶铁线莲与其他物种构成的16个种对中，62.50%的种对生态位重叠程度较低（Qik<0.5），81.25%的种对生态位相似性程度较低（Cik<0.5），反映出群落内各物种间对资源和空间的竞争较为温和，群落较为稳定，槭叶铁线莲在其分布生境中生存状况相对安全；本文研究表明，利用生态位分析方法可以作为珍稀濒危物种生存状态和安全风险评估的一种方法。 Abstract:Clematis acerifolia is a rare and scattered endemic plants in Taihang Mountain, and its living conditions are highly concerned by scholars and local governments. Based on the investigation of typical sample plots of Clematis acerifolia community newly discovered in Huluyu Valley of Yixian County, Hebei Province, this paper quantitatively analyzed the niche breadth, niche overlap and niche similarity of each species, and evaluated the survival safety status of Clematis acerifolia taking the species importance value as the niche measurement index. The results showed that 17 species belonging to 15 genera and 14 families were recorded in the survey plots, and the species composition of the community was simple. Clematis acerifolia had the largest important value in most of the survey plots and occupied a dominant position, while other species were relatively low. Among all species in the community, the niche breadth of Clematis acerifolia was the largest (Bi=6.264), Spiraea dasyantha was the second (Bi=5.144), and other species were smaller, which showed that the adaptability to the environment and the ability to use resources of Clematis acerifolia were stronger than other plants. Among the 136 species pairs composed of all species, 8.09% of which had niche overlap value Qik=1, 16.91% of which had niche overlap value 0.5 ≤ Qik<1, 75.00% of which had niche overlap value Qik<0.5, the degree of niche overlap between species was relatively low. Meanwhile, among the 136 species pairs, 8.09% of which had niche similarity Cik=1, 5.88% of which had niche similarity 0.5 ≤ Cik<1, 86.03% of which had niche similarity Cik<0.5, niche similarity value of most species were at a low level, the degree of niche similarity was also low. For all 16 species pairs composed of Clematis acerifolia and other species, 62.50% of which had low niche overlap (Qik<0.5), and 81.25% had low niche similarity (Cik<0.5), the degree of niche overlap and niche similarity between Clematis acerifolia and other species was relatively low, too. Niche analysis indicated that the competition among species in the community was mild and the community was relatively stable, the living condition of Clematis acerifolia was relatively safe and it could adapt to the special cliff environment of Huluyu Valley. This study shows that niche analysis can be used as a method to evaluate the survival status and safety risk of rare and endangered species. 参考文献 相似文献 引证文献