FAN Ruixia,LI Xuebin,CHEN Lin,et al.Spatial Distribution Pattern of Artemisia ordosica Population Under Enclosure Condition in Desert Steppe[J].Northern Horticulture,2016,40(01):45-50.[doi:10.11937/bfyy.201601013]
荒漠草原油蒿（Artemisia ordosica）种群的空间分布格局特征
- Title:
- Spatial Distribution Pattern of Artemisia ordosica Population Under Enclosure Condition in Desert Steppe
- 文献标志码:
- A
- 摘要:
- 油蒿是荒漠草原常见的一种植被，其在荒漠草原生态系统恢复与重建中有非常重要的作用。现在调查荒漠草原围封条件下油蒿种群的空间分布格局基础上，应用Ripley’s K(t)系数法对油蒿种群的空间格局及不同龄级的空间关联性进行了分析研究。结果表明：围封条件下油蒿种群基本属于稳定型种群，但由于幼小级个体偏少，可能会影响到该区域油蒿种群的发展。在0~12 m的空间尺度下油蒿种群是显著聚集的，不同龄级油蒿聚集的强度和尺度有所不同，随着龄级的增大，油蒿种群的聚集强度逐渐减弱。油蒿种群在不同的发育阶段的空间关联性不同，相邻的发育阶段之间在小尺度上关联性较强；随着尺度的增加，相邻的发育阶段之间关联性有减弱的趋势；随着种群的发育，相邻的发育阶段之间关联性有减弱的趋势，这说明油蒿种群的空间分布和空间关联是一致的。
- Abstract:
- Artemisia ordosica is the dominant species in desert grassland of Ningxia.The experiment investigated the Artemisia ordosica population under enclosure in desert steppe,discussed the spatial pattern of Artemisia ordosica population in the study area，the spatial pattern in each age class structure，and spatial correlation of different age class with the application of the Ripley’s K(t) coefficient method.The results showed that under the condition of enclosing Artemisia ordosica population belong to the stable population，but due to lack of young individuals，which seriously affected the development of the region of Artemisia ordosica population.In the 0-12 m spatial scale，Artemisia ordosica population was significant aggregation，strength and scale aggregation was different in each size classes of Artemisia ordosica.With the increase of the individual，the aggregation intensity of Artemisia ordosica population gradually weakened.Spatial correlation is different in different developmental stages of Artemisia ordosica population.Between the developmental stages of adjacent at the small scale,the Artemisia ordosica population was strong correlation.With the increasing of scale，there was a decreasing trend of correlation between adjacent development stage；with the population development association，there was a decreasing trend between the developmental stages of adjacent，which showed the spatial distribution and spatial association of A.ordosica population was consistent.
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备注/Memo
第一作者简介：樊瑞霞（1990-），女，硕士研究生，研究方向为恢复生态学。E-mail：nmfanruixia@163.com.责任作者：李学斌（1972-），男，博士，副研究员，硕士生导师,现主要从事草地生态学和土壤碳循环等研究工作。E-mail:lixuebin@nxu.edu.cn.基金项目：国家自然科学基金资助项目（31260581）；教育部科学技术研究资助项目（213037A）。