大青沟自然保护区主要森林群落优势种的种群分布格局  

Population distribution patterns of dominant species in major forest communities in Daqinggou Nature Reserve

作　　者：刘贵峰[1] 刘玉平[1] 程伟燕[1] 白日吐 安立伟[1] 张志威[1] 

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028000 [2]内蒙古大青沟国家级自然保护区管理局,内蒙古科左后旗028100

出　　处：《生态学杂志》2016年第8期2082-2087,共6页Chinese Journal of Ecology

基　　金：国家自然科学基金项目(31260108);内蒙古自治区人才开发基金项目资助

摘　　要：选择大青沟国家级自然保护区的水曲柳群落、蒙古栎群落和大果榆群落进行野外群落学调查,应用理论分布模型和聚集强度指标对其优势种水曲柳种群、蒙古栎种群和大果榆种群不同发育阶段、不同取样尺度下的聚集强度进行研究。结果表明:除了水曲柳种群在第Ⅱ、Ⅳ龄级,大果榆种群在第Ⅲ、Ⅳ龄级为随机分布外,3个优势种在4个发育阶段、4个不同取样尺度分布格局均为聚集分布。不同发育阶段和不同取样尺度对其分布格局和聚集度均有不同程度的影响。随着径级的增大或年龄的增加,3个优势种种群的聚集度均降低,除蒙古栎种群为聚集分布外,水曲柳种群和大果榆种群均呈现随机分布的趋势。随着研究尺度的增大,同一种群同一发育阶段的聚集强度呈下降的趋势。Three types of forest community （Fraxinus mandshurica, Quercus mongolica, and U1- mus macrocarpa） were investigated to explore the population distribution patterns of dominant species in Daqinggou Nature Reserve in Inner Mongolia. By using theoretical distribution model and aggregation intensity index, the distribution patterns of F. mandshurica, Q. mongolica, and U. macrocarpa under different developmental stages and at different spatial scales were analyzed. The results showed that the population of dominant species generally presented a clumped distri- bution. However, populations in 11 （4 cm≤DBH〈8 cm） and IV （DBH≥24 cm） developmen- tal stage of F. mandshurica and those in m （s cm≤DBH〈24 cm） and IV developmental stage of U. macrocarpa showed random distributions. The clustering intensity of all three populations de- creased with the increasing stem age （DBH） or developmental stage. F. mandshurica and U. macrocarpa showed random distributions but Q. mongolica presented a clumped distribution with the developmental stage. The clustering intensity of the same population and developmental stage decreased with increasing study scale. Our study proved that both the distribution pattern and clustering intensity of the three populations were affected by the developmental stages and spatial scales.

关 键 词：大青沟自然保护区 种群 分布格局 发育阶段 

分 类 号：S718.5[农业科学—林学]