CAJ | 학술논문

通过对民勤县荒漠-绿洲交错带梭梭种群年龄结构、静态生命表、生存分析等研究来揭示种群数量动态特征；并选取6种常用聚集度指标判断梭梭种群在交错带不同区域、不同龄级分布格局变化规律。结果表明，民勤县荒漠-绿洲交错带梭梭种群以中幼林为主体，为增长型种群。存活曲线趋于Deevey-Ⅲ型；种群数量在Ⅰ～Ⅴ龄级内波动较大，个体死亡现象较多，在Ⅵ～Ⅹ龄级内种群数量趋于稳定，在Ⅹ龄级以后，个体死亡现象又开始升高，呈现衰退趋势，种群期望寿命在Ⅳ～Ⅵ龄级较高。种群分布格局总体呈现聚集分布，从绿洲边缘向沙漠边缘延伸方向，其种群分布格局无明显变化规律；随着龄级的增大，种群分布格局由聚集分布趋向均匀分布，期间有少量随机分布出现。
통과대민근현황막-록주교착대사사충군년령결구、정태생명표、생존분석등연구래게시충군수량동태특정；병선취6충상용취집도지표판단사사충군재교착대불동구역、불동령급분포격국변화규률。결과표명，민근현황막-록주교착대사사충군이중유림위주체，위증장형충군。존활곡선추우Deevey-Ⅲ형；충군수량재Ⅰ～Ⅴ령급내파동교대，개체사망현상교다，재Ⅵ～Ⅹ령급내충군수량추우은정，재Ⅹ령급이후，개체사망현상우개시승고，정현쇠퇴추세，충군기망수명재Ⅳ～Ⅵ령급교고。충군분포격국총체정현취집분포，종록주변연향사막변연연신방향，기충군분포격국무명현변화규률；수착령급적증대，충군분포격국유취집분포추향균균분포，기간유소량수궤분포출현。
The research was conducted to reveal quantity dynamics characteristics with the age structures, static life table andsurvival analysis for Haloxylon ammodendron population of the desert-oasis ecotone in Minqin County and determine thedistribution patterns in the different zones of the desert-oasis ecotone and among different age classes with six distributionindexes.The population is dominated with young and middle-aged plants, the population is close to Deevey’s type III, and the death phenomenon is serious in the age stage of I-V.In the age stage of VI-X, the quantity of population tends tobe stable, the individual death phenomenon begins to rise again and presents recession trend after age stage of X, and thepopulation life expectancy is higher in the age stage of IV-VI.Total population shows the clumped distribution, and thereis noregular rule along the edge of oasis to the edge of desert.With the increasing of the ageclass , the distribution patternis from clumped tend to uniform, and there are a few random distributions during this period.