植物生态学报 ›› 2017, Vol. 41 ›› Issue (2): 165-174.doi: 10.17521/cjpe.2015.0448

• 研究论文 • 上一篇    下一篇

内蒙古灌丛化草原毛刺锦鸡儿种群结构和空间分布格局

张璞进1,2,3, 清华4, 张雷5, 徐延达6, 木兰1,2, 晔薷罕1,2, 邱晓1,2, 常虹1,2, 沈海花3, 杨劼4,*()   

  1. 1内蒙古自治区农牧业科学院, 呼和浩特 010031
    2中国科学院内蒙古草业研究中心, 呼和浩特 010031
    3中国科学院植物研究所植被与环境变化国家重点实验室, 北京 100093
    4内蒙古大学生态与环境学院, 呼和浩特 010021
    5内蒙古自治区林业科学研究院, 呼和浩特 010010
    6中国环境科学研究院国家环境保护区域生态过程与功能评估重点实验室, 北京 100012
  • 收稿日期:2015-12-07 接受日期:2016-09-21 出版日期:2017-02-10 发布日期:2017-03-16
  • 通讯作者: 杨劼 E-mail:jyang@mail.imu.edu.cn
  • 作者简介:

    * 通信作者Author for correspondence (E-mail:sunzhiqiang1956@sina.com)

  • 基金资助:
    国家自然科学基金(31300360、31330012和31470525)、内蒙古自然科学基金(2012MS0506)和内蒙古科技计划项目(耐寒生态品种选育与退化荒漠草原修复技术研究——内蒙古退化荒漠草原生态修复技术研究)

Population structure and spatial pattern of Caragana tibetica communities in Nei Mongol shrub-encroached grassland

Pu-Jin ZHANG1,2,3, Hua QING4, Lei ZHANG5, Yan-Da XU6, Lan MU1,2, Ru-Han YE1,2, Xiao QIU1,2, Hong Chang1,2, Hai-Hua SHEN3, Jie YANG4,*()   

  1. 1Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences, Hohhot 010031, China

    2 Inner Mongolia Prataculture Research Center, Chinese Academy of Sciences, Hohhot 010031, China

    3State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China

    4School of Ecology and Environment, Inner Mongolia University, Hohhot 010021, China

    5Inner Mongolia Academy of Forestry Sciences, Hohhot 010010, China

    6State Environmental Protection Key Laboratory of Regional Ecological Processes and Functions Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012
  • Received:2015-12-07 Accepted:2016-09-21 Online:2017-02-10 Published:2017-03-16
  • Contact: Jie YANG E-mail:jyang@mail.imu.edu.cn
  • About author:

    KANG Jing-yao(1991-), E-mail: kangjingyao_nj@163.com

摘要:

灌丛化草原的形成机制和群落结构与功能是植被生态学研究的一个重要科学问题。植物种群空间格局分析是研究植物种群相互作用及种群与环境关系的重要手段。灌丛化草原是内蒙古草原的主要类型。该文选择分布在鄂尔多斯市的毛刺锦鸡儿(Caragana tibetica)灌丛化草原为研究对象, 布设一个64 m × 64 m的样方, 采用“三线定位法”确定样方中灌木的空间位置, 用点格局的方法分析灌木空间分布格局与种内关联。结果显示: (1)毛刺锦鸡儿种群为增长型种群, 成熟毛刺锦鸡儿个体在半径<3.7 m的范围内为均匀分布, 范围增大则呈随机分布; 毛刺锦鸡儿幼年个体在0.3-20.4 m之间为聚集分布, 其他范围表现为随机分布; 死亡个体在0.7-1.4 m范围为聚集分布, 其他范围则随机分布。(2)毛刺锦鸡儿存活个体对死亡个体在0-9.9 m范围内为不明显的正相互作用, 其他范围无相关关系; 成熟个体对幼年个体在<2.2 m范围表现为负相互作用, 在>2.2 m范围表现为不相关。研究显示, 毛刺锦鸡儿灌丛化草原不同发育阶段的毛刺锦鸡儿种群空间分布格局是不同的, 并随空间尺度的变化而变化, 如果在干旱区采用毛刺锦鸡儿对退化草原进行恢复重建, 灌木间的株行距以4 m为宜。

关键词: 灌丛化草原, 毛刺锦鸡儿, 点格局, 空间分布格局

Abstract:
Aims The community structure and function of the shrub-encroached grassland, as well as its formation mechanism, is one of hot scientific problems in vegetation science. The spatial pattern analysis is an important means for studying plant population interactions and the relationships between plant population and environment. The shrub-encroached grassland is one major vegetation type in Nei Mongol. Knowledge on the spatial pattern of shrub can improve our understanding on adaptive characteristics of shrub to steppe environment.
Methods We chose Caragana tibetica encroached grassland distributed in Ordos City as research objects. The spatial position of each C. tibetica individual in 64 m × 64 m study plot was determined by a method of “three-distance location method”, and then the spatial pattern and intraspecific associations of C. tibetica individuals was analyzed with the point pattern analysis.
Important findings The results showed that C. tibetica population was at the rising stage. The mature individuals showed a uniform distribution at the scale of less than 3.7 m, subsequently exhibiting a random distribution with an increased scale. The juvenile individuals showed an aggregation distribution at the scale of 0.3-20.4 m, but a uniform distribution at other scales. The dead C. tibetica individuals were distributed aggregately at the scale from 0.7 to 1.4 m, but randomly at other scales. An indistinctive positive association was found for live C. tibetica individuals to dead individuals at the scale of less than 9.9 m, but no associations was found between them at other scales. The mature individuals negatively interacted with juveniles at the scale of larger than 2.2 m, but unassociated at the other scales.

Key words: shrub-encroached grassland, Caragana tibetica, point pattern, spatial distribution pattern