柳杉人工林林窗土壤动物群落结构特征
摘要：
采用手捡法和干湿漏斗法对柳杉林窗和林下土壤动物群落进行调查.结果显示:试验所采集到的土壤动物平均密度为1.89×104只/m2,共60类,分属于5门10纲25目.林窗各层土壤动物类群数高于林下,并随土层加深而递减;枯落物和10~15 cm层土壤动物密度林窗大于林下,0~5 cm和5~10 cm土层林下高于林窗,其中0~5 cm层差异显著(P<0.05).同功能种团分析表明:林窗和林下均以杂食性土壤动物为主,其密度差异不显著(P>0.05);多样性指数分析显示,除Simpson 优势度指数(C)外,其余3个指数均以林窗高于林下,表明林窗的形成对柳杉人工林土壤动物群落分布与多样性特征产生了一定影响.
关键词: 柳杉人工林, 林窗, 土壤动物, 群落结构
Abstract:
Investigation on soil fauna was carried out in forest gap and under forest canopy of Cryptomeria fortune artificial stands. A total of 60 orders soil fauna, belonging to 10 phyla and 25 classes, were collected, and average density was 1.89×104 ind./m2. The group number of soil fauna in forest gap was higher than that under forest canopy, and both decreased when the soil layers increased. Densities in forest gap and under forest canopy were found to be significantly different in 0~5 cm layer (p<0.05). The guilds of soil fauna in forest gap and under forest canopy were dominated by the omnivorous, and followed by the saprozoic. H', J, and DG index were higher in forest gap than under forest canopy, but C index was lower in forest gap than under forest canopy, which showed that forest gap had influences on distribution and diversity of soil fauna in Cryptomeria fortune artificial stands.
Key words: Cryptomeria fortune artificial stands, forest gap, soil fauna, community structure
中图分类号:
S714.3
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