摘要
在群落调查的基础上,应用χ2检验、Ochiai关联度指数、Pearson相关分析和Spearman秩相关分析,研究了老秃顶子自然保护区水源涵养林群落内16种主要乔木树种的种间联结性和相关性。结果表明,所有种对中,多数种对间关联程度为不显著水平,呈极显著相关和显著相关的种对数相对较少,表明群落内多数乔木树种间关系较松散,未形成明显的总体关联性,群落处于相对稳定状态;种间关系分析中,χ2检验、Ochiai关联度和Pearson相关分析的结果比Spearman秩相关分析结果的灵敏度要低;根据分析结果,结合乔木种群的生物学和生态学特征,可将老秃顶子保护区水源林群落中16种主要乔木树种划分为3个生态种组,同一生态种组内物种的生态要求和资源利用方式相近,联结紧密,而不同种组间联结较为松散。
Water conserving forest in the Laotudingzi Natural Reserve of Liaoning Province was investigated. Based on the important values of population, a study was performed to discuss the interspecific relationships among 16 main tree species by χ2-test, Ochiai association index, Pearson＇ s correlation coefficient and Spearman^s rank correlation coefficient. Results showed that the connection degree of most species-pairs did not reach a level of significance and the proportion of species-pairs which had highly significant or significant correlation was less, indicating that the interspecific relationships among forest tree species were loose and did not form a significant overall association, so the community was relatively stable. Compared with χ2-test, Ochiai association test and Pearson＇s correlation coefficient test, Spearman＇s rank correlation coefficient test was sensitive. According to the analysis results and combined with the tree species population biology and ecological adaptations, the 16 main tree species in the water conserving forest can be divided into three ecological species groups. The ecological requirements and resource use patterns of tree species within the same ecological species group are similar, exhibiting a close connection between the tree species and however, there is a loose coupling between different ecological species groups.
出处
《水土保持通报》
CSCD
北大核心
2014年第1期79-85,共7页
Bulletin of Soil and Water Conservation
基金
“十二五”农村领域国家科技计划课题“辽河上游水源涵养林体系构建技术研究与示范”(2011BAD38B0502)
关键词
水源涵养林
种间联结
种间相关
生态种组
老秃顶子自然保护区
water conserving forest
interspecific association
interspecific correlation
ecological species group
Laotudingzi Natural Reserve
