应用生态学报2012，Vol.23Issue(12)：3402-3408,7.
西藏色季拉山急尖长苞冷杉林土壤线虫群落特征
Community characteristics of soil nematode in Abies georgei var.smithii forest in Sejila Mountain of Tibet, Southwest China
摘要
Abstract
In order to understand the present status of nematode diversity in soil ecosystem of Abies georgei var. smithii forest, the typical forest type in subalpine zone of southeastern Tibet, an investigation was made on the nematode community in different soil layers of 0 - 30 cm depth from the summer, 2010 to the spring, 2011. The nematode individual density, diversity index, and trophic group index were taken to analyze the composition and structural characteristics of the soil nematode community. A total of 7915 soil nematodes belonging to 2 classes, 6 orders, 38 families, and 67 genera were collected by shallow dish method. The nematode individual density was averagely 620 nematodes · 100 g~ dry soil, and the nematode individuals in surface soil layer (0-5 cm) accounted for 56. 9% of the total, indicating the obvious surface gathering characteristics of the nematode community. Tylencholaimus, Helicotylenchus, and Plectus were the dominant genus. Plant-parasite nematode was the dominant trophic group, while fungi-feeding nematode had the largest proportion among the non plant-parasite nematodes. Soil organic matter was mainly decomposed by fungi. The ANOVA analysis indicated that there were no significant differences in the Shannon, Pielou, Mar-galef, and Simpson indices of soil nematode community among different seasons. The Pielou index had no significant difference among different soil layers, while the differences of Shannon, Mar-galef, and Simpson indices tended to be increased with increasing soil depth. It was concluded that the A. georgei var. smithii forest ecosystem in Sejila Mountain had a high maturity, with strong resistance to environment disturbances.关键词
线虫/群落结构/生物多样性/西藏Key words
nematode/ community structure/ biological diversity/ Tibet分类
农业科技引用本文复制引用
薛会英,罗大庆,于宝政..西藏色季拉山急尖长苞冷杉林土壤线虫群落特征[J].应用生态学报,2012,23(12):3402-3408,7.基金项目
西藏大学农牧学院"211工程"三期"高原生态学"项目[XZA-211(3)-071012-04]和国家自然科学基金项目(31060113)资助. （3）
