菜阳河自然保护区岭罗麦、光序肉实树群落中树种的种间分离

Interspecific Segregations of the Tree Species in Tarennoidea

以5000 m2 的植物群落调查样地资料为基础, 采用N×N最近邻体列联表的截表法,用X2 适合性检验和分离指数指标, 对菜阳河自然保护区岭罗麦(Tarennoidea wallichii)、光序肉实树(Sarcosperma kachinense var simondii) 群落的种间分离进行了探讨。结果表明, 在25个主要树种形成的300组种对中, 大多数种对的种间关系表现为随机毗邻(占75 33%), 部分表现为显著正分离(占19 67%), 少数表现为显著负分离(占5%), 这种以随机毗邻为主的种间分离格局与多数种群呈随机分布有关。群落中呈聚集分布的物种与其它物种易发生正分离, 一般不会表现为负分离; 而呈随机分布的物种与其它物种则多数表现为随机毗邻,少数表现为正分离或负分离。

Based on data from the plot of 5000?m^2,using x^2 suitability text and coefficient of segregation by the subtable of the N×N nearest-neighbor contingency table,the interspecific segregations of the tree species in Tarennoidea wallichii,Sarcosperma kachinensis var.simondii Community in Caiyanghe Nature Reserve were studied.The results showed that among 300 species pairs in 25 main tree species of the community,most were random (accounting for 75.33%),some of pairs were positively segregated (accounting for 19.67%) and a few pairs were negatively segregated (accounting for 5%).The interspecific segregation patterns are related to the distribution patterns of populations in which many of arbor populations were random species.In the community most of pairs between clumped species and other species were positively segregated and few of which were negatively segregated.Most of pairs between random species were random and some of them were positively or negatively segregated.