长白山春季不同植被类型中土壤线虫的群落结构  

Nematode community composition and diversity associated with different vegetations in Changbai Mountain in spring

作　　者：佟富春[1,2] 肖以华[3] 王庆礼[2] 

机构地区：[1]华南农业大学林学院,广东广州510642 [2]中国科学院沈阳应用生态研究所,辽宁沈阳110016 [3]中国林业科学研究院热带林业研究所,广东广州510520

出　　处：《生态环境学报》2009年第2期653-657,共5页Ecology and Environmental Sciences

基　　金：国家自然科学基金项目(30170744&70373044);国家攻关项目(2002BA516A20)

摘　　要：2001年和2002年春季,对长白山白北坡不同海拔的阔叶红松林、红松云冷杉混交林、暗针叶林、岳桦林和高山苔原中土壤线虫进行了研究。结果表明,5个样地中共鉴定到线虫7684条,分别隶属于2纲8目27科60属。其中绕线属Plectus,滑刃属Aphelenchoides,垫刃属Tylenchus,小杆属Rhabditis,盘旋属Rotylenchus和鹿角唇属Cervidellus为优势属,优势属线虫主要分布在枯枝落叶层中。土壤线虫数量与土壤含水量显著相关(r=0.357;P<0.01)。在不同深度和植被群落中丰富度最大的是食细菌类群线虫。土壤线虫总数和营养类群在不同土壤深度中差异显著(P<0.05);食真菌类群数量与食细菌类群数量之和与植食类群数量之比(WI)和线虫成熟指数(MI)在不同深度也存在明显差异(P<0.01)。The effect of an altitude gradient on soil nematode communities was investigated in the Changbai Mountain. Five locations from an elevation of 762m above sea level with 691.4mm rainfall to a 2200m relative to sea level with a rainfall 1 154.34 mm, were studied： Broad-leaved Korean Pine forest, Korean Pine and spruce-fix mixed forest, Dark Coniferous forest, Erman＇s birch forest and Alpine tundra. Soil samples were collected in spring of 2001 and 2002. A total of 7 684 nematode individuals were collected, belonging to two classes, eight orders, 30 families and 68 genera. Plectus, Aphelenchoides, Tylenchus, Rhabditis, Rotylenchus and Cervidellus were the dominant genera in the experimental field and most of them live in fall-litter. The total of soil nematode and soil moisture were significantly correlated. Species richness of Fungivorous nematode is higher than others in different vegetation communities and soil depth. The total of soil nematode and trophic groups varied significantly （P〈0.05） in response to different soil depths. The number of Fungal and Fungivorous nematode and the value of WI and MI changed significantly （P〈0.01） as well as this.

关 键 词：线虫群落 植被类型 春季 长白山 

分 类 号：S154.386[农业科学—土壤学]