内蒙古灌丛化草原毛刺锦鸡儿种群结构和空间分布格局

doi:10.17521/cjpe.2015.0448

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

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
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 ZHANG^1,^2,³, Hua QING⁴, Lei ZHANG⁵, Yan-Da XU⁶, Lan MU^1,², Ru-Han YE^1,², Xiao QIU^1,², Hong Chang^1,², Hai-Hua SHEN³, Jie YANG^4,^*()

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

摘要/Abstract

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

张璞进, 清华, 张雷, 徐延达, 木兰, 晔薷罕, 邱晓, 常虹, 沈海花, 杨劼. 内蒙古灌丛化草原毛刺锦鸡儿种群结构和空间分布格局. 植物生态学报, 2017, 41(2): 165-174. DOI: 10.17521/cjpe.2015.0448

Pu-Jin ZHANG, Hua QING, Lei ZHANG, Yan-Da XU, Lan MU, Ru-Han YE, Xiao QIU, Hong Chang, Hai-Hua SHEN, Jie YANG. Population structure and spatial pattern of Caragana tibetica communities in Nei Mongol shrub-encroached grassland. Chinese Journal of Plant Ecology, 2017, 41(2): 165-174. DOI: 10.17521/cjpe.2015.0448

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链接本文: https://www.plant-ecology.com/CN/10.17521/cjpe.2015.0448

https://www.plant-ecology.com/CN/Y2017/V41/I2/165

图/表 6

图1 三线定位法示意图。a和b是灌木冠幅中心距2个固定点的距离, c是2个固定点间距离, 斑块示意灌木冠幅。

Fig. 1 Schematic view of “three-distance location method”. a and b are the distances of canopy center to each two fixed points, c is the distance of the two fixed points, patches are schematic maps of the shrubs canopy.

图2 毛刺锦鸡儿在样方中的分布图。实心圆表示存活个体, 空心圆表示死亡个体, 圆大小表示了成比例的植株冠幅大小。

Fig. 2 The distribution of Caragana tibetica in 64 m × 64 m plot. Each circle gives the location of living (filled circle) and dead (empty circle) C. tibetica and circle area is proportional to canopy of C. tibetica.

图3 毛刺锦鸡儿冠幅长与宽的回归关系。

Fig. 3 Relationship between the length and width of Caragana tibetica canopy.

图4 毛刺锦鸡儿冠幅与高度的回归关系(实心点), 及不同冠幅区间(以10 cm为步长, 如10 cm表示0-10 cm的范围, 20 cm表示10-20 cm的范围, 依次类推)内毛刺锦鸡儿个体数量(直方图)。

Fig. 4 Relationship (filled circle) between the length and height of Caragana tibetica canopy, and individual number (histogram) in each range of canopy length with a step size of 10 cm, eg. 10 cm indicated a length range of 0-10 cm, the rest can be done in the same manner.

图5 毛刺锦鸡儿种群不同存活状态和不同发育阶段植株个体的分布格局。虚线为L(r)函数值, 实线为上下包迹线, r为以毛刺锦鸡儿为圆心的取样半径, 上下包迹线是模拟999次随机分布格局得到L(r)函数最大值和最小值。

Fig. 5 Ripley’s L-function for patterns of Caragana tibetica individuals under different survival status and developmental stages with confidence envelopes (lines). r referred to radius of sample circle from C. tibetica as center, Confidence envelopes are the highest and lowest L(r) of 999 randomizations of the pattern over the study region.

图6 温表毛刺锦鸡儿种群不同存活状态和不同发育阶段植株个体的相关关系。虚线为L(r)函数值, 实线为上下包迹线, r为以毛刺锦鸡儿为圆心的取样半径, 不同存活状态相关关系和不同发育阶段相关关系的上下包迹线是分别采用随机标签零假设和相互独立零假设模拟999次得到的L(r)函数最大值和最小值

Fig. 6 Ripley’s L-function for spatial association of C. tibetica individuals under different survival status and developmental stages with confidence envelopes (lines). r referred to radius of sample circle from C. tibetica as center, Confidence envelopes are the highest and lowest L(r) of 999 replicates of a random labeling null model for individuals under different survival status and of a population independence null model for individuals under developmental stages.

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内蒙古灌丛化草原毛刺锦鸡儿种群结构和空间分布格局

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

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