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应用生态学报 ›› 2010, Vol. 21 ›› Issue (09): 2367-2374.

• 研究报告 • 上一篇    下一篇

不同坡位下巨桉人工林土壤动物群落特征

赵 瑜,钟 宇,张 健**,杨万勤   

  1. 四川农业大学林学院/长江上游林业生态工程省级重点实验室,四川雅安 625014
  • 出版日期:2010-09-18 发布日期:2010-09-18

Community structure of soil fauna in Eucalyptus grandis plantations at different slope locations.

ZHAO Yu, ZHONG Yu, ZHANG Jian, YANG Wan-qin   

  1. College of Forestry, Sichuan Agricultural University/Sichuan Province Key Laboratory of Forestry Ecological Engineering of Upstream of the Yangtze River, Ya’an 625014, Sichuan, China
  • Online:2010-09-18 Published:2010-09-18

摘要: 为了解坡位对巨桉人工林土壤动物群落结构的影响,2009年1—10月,调查了四川盆地低山丘陵区不同坡位巨桉人工林的土壤动物群落.从3个巨桉人工林共获取土壤动物34741只,鉴定出146个类群,隶属于7门16纲31目;巨桉人工林下土壤动物的群落组成、营养类群、多样性及其季节动态基本都存在坡位变化,大型和中小型干生土壤动物的个体数、大型土壤动物的腐食性类群和中小型干生土壤动物的杂食性类群数量表现出随坡位的下降而逐渐增多的趋势,说明土壤动物响应了坡位引起的土壤生态因子的变化.其中大型土壤动物的腐食性类群和中小型湿生土壤动物的多样性显示出显著的坡位差异,表明这两个指标能指示巨桉人工林不同坡位生境的异质性.总的看来,巨桉人工林坡位因子对土壤动物群落的分布及结构特征具有一定影响,但作用尚不显著.

关键词: 土壤动物, 坡位, 群落结构, 营养类群, 多样性, 巨桉人工林, 土壤微生物, 大针茅, 典型草原, 根际效应, 土壤养分

Abstract: To understand the effects of slope location on the community structure of soil fauna in Eucalyptus grandis plantation, an investigation was made in the soil fauna in 3 E.grandis plantations at different slope locations in the hilly area of Sichuan Province from January to October 2009. A total of 392762 individuals were observed, belonging to 146 groups, 7 phyla, 16 classes, and 31 orders. The community composition, trophic group, diversity, and seasonal dynamics of soil fauna in the plantations all varied with slope. The abundance of macro-fauna, xeric meso- and micro-fauna, saprophagous macro-fauna, and omnivorous xeric meso-and micro-fauna increased with the decrease of slope, indicating that soil fauna had sensitive responses to the soil environmental factors affected by slope. Significant differences in the diversity of soil saprophagous macro-fauna and hygrophilous meso- and micro-fauna were observed at different slope locations, suggesting that these two faunal groups could be used as the indicators of the habitat heterogeneity of E. grandis plantations at different slope. Overall, slope location had definite effects on the community structure and distribution of soil fauna in the E. grandis plantations, but the effects were not statistically significant.

Key words: soil fauna, slope location, community structure, trophic group, diversity, Eucalyptus grandis plantation, rhizosphere effect, soil nutrient, soil microbe, Stipa grandis, typical steppe.