摘要
对民勤荒漠白刺群落进行野外调查,对其群落的分布、外貌、结构特征及其物种多样性、分布格局、优势种群动态进行了分析研究。结果表明:1)白刺群落是民勤荒漠分布最广的一种植物群落类型,具有地带性分布特征,主要有唐古特白刺和球果白刺;2种群落类型,面积为310 290.20 hm2,占民勤荒漠草地总面积(934 639.80 hm2)的33.20%;2)民勤荒漠白刺灌丛的形态、外貌特征差异较大,不同演化阶段白刺灌丛沙堆空间分布格局差异较大;3)民勤荒漠白刺群落的层片结构简单,由灌木层和草本层组成,植物个体矮、冠幅小、生物量低、几乎都是灌木或者半灌木;群落多样性比较差、物种丰富度低、均匀性也差;群落优势种呈集群分布格局,整体上表现为稳定型种群;这种分布格局与种群的繁殖策略、生物学特性及恶劣的生境条件有关。
Based on field investigation of the Nitraria tangutorum community in Minqin desert,the distribution,the appearance,structural characteristics and its diversity,distribution pattern,the dominant population dynamics were analysed.The results showed that： 1） The Nitraria tangutorum community was the most widely distributed plant communities in Minqin desert,and it had a zonal distribution characteristics and mainly two community types： Nitraria tangutorum and cones Nitraria,areas is 310 290.20 hm2,accounting for 33.20% of Minqin desert grassland area（934 639.80 hm2）.2） The morphology and physical characteristics of Nitraria tangutorum shrub were quite different,the spatial distribution pattern of the Nitraria tangutorum shrub in Minqin desert was different in different evolution stages.3） The Nitraria tangutorum community was composed of simple herbaceous and shrub layer in Minqin desert,and individual plant was dwarf,crown was small,biomass was low,almost all the shrubs or half-shrubs,lamellar structure was simple,community diversity was relatively poor,species richness was poor,uniformity was also poor;distribution pattern of dominant species was clump type,overall performance showed stable populations.This distribution pattern was connected with the population reproductive strategies,the population biological characteristics and the harsh habitat conditions in Minqin desert.
出处
《甘肃林业科技》
2013年第2期1-6,共6页
Journal of Gansu Forestry Science and Technology
基金
甘肃省科学事业费重点项目(QS061-C31-03)资助
关键词
民勤荒漠
白刺群落
分布
结构特征
优势种群
Minqin desert
Nitraria tangutorum community
distribution
structure characteristics
dominant populations
