为探讨长白山地不同地貌类型次生林土壤动物群落多样性特征及其分布格局,分别于2015年春季(5月)、夏季(7月)及秋季(9月)对长白山地三种不同地貌类型(玄武岩台地、花岗岩低山和花岗岩丘陵)的次生林土壤动物进行调查研究。研究表明:大型土壤动物类群数季节变化不显著,中小型土壤动物密度季节波动较大。其中,花岗岩低山次生林大型土壤动物密度和类群数均为最低,玄武岩台地次生林中小型土壤动物密度和类群数要显著高于其他两个生境。通过比较三种生境土壤动物多样性指数发现,大型土壤动物多样性指数随着季节变化表现出相同的动态趋势,均无显著性差异,而中小型土壤动物多样性指数季节波动呈显著升高或降低趋势,且同一季节玄武岩台地次生林的中小型土壤动物多样性指数要显著高于其他两个生境。对三种地貌类型次生林的土壤动物群落与环境因子间相关关系进行了RDA分析,结果表明土壤动物对土壤有机质、全效养分(N、P)和速效养分(N、P、K)响应程度较高,其中中小型土壤动物优势类群甲螨亚目分布对土壤温度、湿度呈显著正向响应。研究可为次生林的管理及生态恢复提供土壤动物学依据。
The soil fauna community diversity and distribution characteristics of the different secondary forest in Changbai Mountains were investigated in this paper. Soil fauna from three secondary forest habitats,including the Basalt platform,Granite low mountain and Granite hill in Changbai Mountain area,were studied in the spring( May),summer( July) and fall( September) of 2015. The soil fauna density and their group numbers differed among the habitats with seasonal fluctuations. The density variation of macro soil fauna with season was not significant,whereas that of meso-micro soil fauna was great. The density and groups of Granite low mountain secondary forest was the lowest,while the Basalt platform secondary forest was significant higher than other two habitats. The diversity indices of macro soil fauna in three habitats were showed the same dynamic trend. The change of soil fauna diversity had no significant differences with different season. The meso-micro soil fauna diversity index was showed a significant increase or decrease trend,which obviously different to macro soil fauna.The meso-micro diversity index of Basalt platform was significant higher than other two habits. Through the RDA analysis of soil fauna and environmental factors we found that the soil fauna responded highly to soil organic matter,total nitrogen,total phosphorus and available nutrient. Oribatida was the dominant group of the meso-micro fauna which distribution showed a significant positive response to soil temperature and humidity. The study can provide the soil zoological theoretical basis for the management and ecological restoration of secondary forest.