山东沂山人工林主要乔木种群特征和种间联结  

Population characteristics and inter-specific association between dominant tree populations of artificial forest in Yishan Mountain, Shandong Province, China

作　　者：孟凡旭[1] 高远 朱孔山[3] 王长龙[4] 王春海[4] 

机构地区：[1]临沂第四中学,山东临沂276037 [2]临沂市科学探索实验室,山东临沂276037 [3]临沂大学商学院地理系,山东临沂276005 [4]曲阜师范大学生命科学学院,山东曲阜273165

出　　处：《生态科学》2015年第2期168-172,共5页Ecological Science

基　　金：临沂市政府决策咨询项目(2014XSL056和2014JCL008);中国科协中学生英才计划地方项目(2013A01)

摘　　要：基于41个样方的调查数据,分析山东沂山人工林主要乔木径级分布,揭示种群特征和种间联结。采用径级结构代替年龄结构分析种群格局动态,发现沂山人工林主要由16种乔木组成,包括扩展种10种、隐退种2种、稳定侵入种2种和随机侵入种2种。数据显示群落正处于正向森林演替过程中,但幼树数量明显稀缺。赤松种群更新困难,黑松和栓皮栎缺失幼树,日本落叶松完全没有更新幼苗。种间联结性分析以x2统计量为基础,以联结系数AC确定物种间联结性。采用2×2列联表对10种乔木优势种,45个种对间的关联性进行了研究,显示正关联:负关联:无关联为2︰29︰14,不显著(p≥0.05):显著(p<0.05):极显著(p<0.01)为:31︰0︰14。沂山人工林主要乔木种间联结以负相关为主。Based on the data obtained from the survey of 41 samples, we analyzed the tree diameter-class distribution of artificial forest in Yishan Mountain and revealed the population characteristics and interspecific association. By substituting age structure analysis with diameter structure analysis, we found that the plantation in Yishan Mountain was composed mainly of 16 types of trees, including l0 expansive species, 2 seclusive species, 2 enhancing invasive species and 2 randomly invasive species. The data shows that the community is in the process of succeeding to forest, but the saplings are rare. The regeneration ofPinus densiflora population is in great difficulty; Pinus thunbergii and Quercus variabilis also lack saplings; The saplings of Larix kaempferi are not observed at all. The analysis of interspecific association was based on chi-square test, with association index AC reflecting association magnitude. With 2x2 contingency tables we studied the 45 inter- specific associations between 10 dominant tree species, which showed that the ratio between positive association, negative association and no association was 2：29：14. The insignificant difference （p〉0.05）, significant difference （p〈0.05） and extremely significant difference （p〈0.01） was 31：0：14. The interspecific associations between major tree species of plantation in Yishan Mountain are mostly negative correlation.

关 键 词：种群特征 径级分布 种间联结 沂山 

分 类 号：Q948[生物学—植物学]