期刊文献+

外来入侵植物肿柄菊在云南的分布特征及其影响因素 被引量:12

Distribution characteristics and influencing factors of Tithonia diversifolia,an alien invasive plant species,in Yunnan Province,China
原文传递
导出
摘要 公路网是外来入侵植物肿柄菊(Tithonia diversifolia)进行远距离传播的主要途径,近些年肿柄菊在云南表现出迅速的扩散态势和较强的入侵能力。为探讨肿柄菊沿公路进行扩散过程中各种环境因素对群落建立的影响,本研究通过大范围沿公路实地调查,分析肿柄菊的扩散和分布特征及其影响因素。结果表明:肿柄菊分布于云南省北热带、南亚热带、中亚热带和北亚热带等多种气候类型区,分布区覆盖云南省71个县(区),与10多年前相比肿柄菊有明显的向北和向高海拔扩散趋势。肿柄菊向更高纬度和海拔扩散过程中,气候因素对群落分布有一定影响;在较低纬度和海拔区域肿柄菊的分布主要受人为干扰的影响。不同路缘生境类型影响肿柄菊沿公路扩散范围,植被郁闭度较低的草地、经济林地、农田等生境有利于群落的建立;而植被郁闭度较高原始林地和次生林地不利于群落建立。公路在肿柄菊的远距离扩散过程中起着重要作用,车流量大、车速高的高等级公路更有利于肿柄菊扩散,云南密集的高速公路网促进了肿柄菊沿公路扩散效率,加速了肿柄菊侵占新领地的过程。随着公路交通的快速发展,肿柄菊的扩散速度也明显加快,今后应对其种群发展趋势进行跟踪监测,以期为肿柄菊入侵预警提供基础信息。 Tithonia diversifolia,an alien invasive plant species,has quickly spread along roads in Yunnan Province,China. To better understand the distribution of T. diversifolia,we investigated its community distribution along roads and analyzed the influencing factors. T. diversifolia has invaded the tropical,and southern,central and northern subtropical regions of Yunnan,which covered 71 counties. In contrast to its distribution 10 years ago,T. diversifolia definitely extended northward and to higher altitude. At higher latitude and altitude region,the distribution of T.diversifolia was related to climatic factors. At lower latitude and altitude region,the distribution was mainly influenced by human disturbance. The habitat types along roads substantially influenced the establishment of T. diversifolia. Grassland,economic forest,and cropland habitats with low canopy cover facilitate its invasion,whereas natural and secondary forest habitats with high canopy cover could resist its invasion. Roads obviously promoted the dispersal of T. diversifolia.Higher-grade roads with heavy traffic were in favor of the dispersal of T. diversifolia than lowergrade roads. The dense network of highways advanced its invasive process. With the rapid development of highways,the invasion of T. diversifolia speeded up in Yunnan. Population dynamics should be monitored for warning the invasion of T. diversifolia.
作者 朱枫 王四海 陈剑 李宁云 吴超 ZHU Feng;WANG Si-hai;CHEN Jian;LI Ning-yun;WU Chao(School of Geography,Southwest Forestry University,Kunming 650224,China;Yunnan Key Laboratory of Forest Plant Cultivation and Utilization/State Forestry Administration Key Laboratory of Yunnan Rare,Endangered Species Conservation and Propagation,Yunnan Academy of Forestry,Kunming 650201,China;National Plateau Wetlands Research Center,Southwest Forestry University,Kunming 650224,China)
出处 《生态学杂志》 CAS CSCD 北大核心 2018年第9期2573-2580,共8页 Chinese Journal of Ecology
基金 国家自然科学基金项目(31560092)资助
关键词 植物扩散 生境 人为干扰 群落建立 plant dispersal habitat human disturbance community establishment.
  • 相关文献

参考文献10

二级参考文献236

共引文献530

同被引文献163

引证文献12

二级引证文献46

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部