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OALib Journal期刊
ISSN: 2333-9721
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秦岭西部日本落叶松林大型土壤动物群落特征
DOI: 10.3724/SP.J.1145.2013.00611, PP. 611-617
Keywords: 秦岭,日本落叶松林,发育阶段,大型土壤动物,群落结构
Abstract:
人类对次生林生态系统的长期扰动必然会对地下生态过程产生深刻影响，而土壤动物群落结构和功能多样性对地下生态过程的演变有重要的指示意义.本文以秦岭西部小陇山林区不同发育阶段日本落叶松林为研究对象，采用手捡法和样方法调查了不同发育阶段日本落叶松林大型土壤动物群落组成、结构及多样性，运用方差分析及pca排序等方法系统探讨了日本落叶松林大型土壤动物群落演变特征.研究结果显示，10年日本落叶松林土壤动物密度和类群丰富度均显著高于20年和32年日本落叶松林，而32年日本落叶松林土壤动物群落密度又显著高于20年日本落叶松林；20年日本落叶松林土壤动物群落多样性和均匀度指数均显著高于10年和32年日本落叶松林.同时，研究发现不同发育阶段日本落叶松林土壤动物群落“腐食性+杂食性”密度变化与类群丰富度随着林龄的增加有降低的趋势.此外，研究还发现，不同发育阶段日本落叶松林倍足纲、步甲科、双翅目幼虫和蚁科动物类群密度存在明显变化，说明这些动物类群可以用来指示日本落叶松林土壤环境变化.研究表明引种日本落叶松林土壤动物群落密度及类群丰富度显著降低，而“腐食性+杂食性”密度及类群丰富度也随之降低.图3表2参27
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