摘要
对小兴安岭白桦林土壤跳虫的动态特征进行了研究 ,共获土壤跳虫 36. 31只 ,隶属 10科。其中 ,优势科 3科 (节跳虫科、棘跳虫科、球角跳虫科 ) ,占总个体数的 90 . 2 2 %。 1997年所获的土壤跳虫个体数和科数最多。土壤跳虫个体数的月份动态为 6月 <8月 <10月 ,而科数却以 8月份最多 (10科 )。土壤跳虫数量随着土壤深度的增加 ,呈递减的变化趋势。各层次随着月份的推移 ,个体数量占总数的百分比在增加 ,特别是个体数占总个体数比例最大的节跳虫的垂直分布及其时间动态非常符合此规律。土壤跳虫的Margalef丰富度指数、Shannon-Weiner多样性指数和Pielou均匀度指数的变化规律一致 ,而与Simpson优势度指数的变化规律相反。多样性指数的月份动态为 8月 >6月 >10月 ;年际动态为 1997年 >1996年。 1997年 8月的丰富度指数和多样性指数最高。
Dynamic characteristics of soil collembolans in the birch forest of Xiao Xing'anling were studied from 1995 to 1997.Totally 3631 soil collembolans belonging to 10 families were obtained,among which,Isotomidae,Onychiuridae and Hypogastruridae were dominant and their amount reached 90.22% of the total.The individual numbers and the family numbers of soil collembolans in 1997 were the highest.The monthly dynamics of individual numbers of soil collembolans was June<August<October,while the family number of August was the highest.The vertical distribution of soil collembolans tended to decrease with the increaseing depth.In each soil layer,the percentage of individual number increased with time.Isotomidae,which has the most individual number accorded with the law of vertical distribution and temporal dynamic especially.The changes of Shannon-Weiner diversity index,Margalef richness index and Pielou evenness index were similar,contrary to that of Simpson dominance index.The monthly dynamics of diversity was August>June>October.The values of richness and diversity index in 1997 were higher than those in 1996,and the values of the richness,diversity and evenness of August in 1997 was the highest.
出处
《生态学杂志》
CAS
CSCD
北大核心
2005年第3期278-282,共5页
Chinese Journal of Ecology
基金
国家自然科学基金资助项目 (4 0 1710 5 3和 494710 45 )
关键词
土壤跳虫
动态特征
白桦林
小兴安岭
soil collembolans,dynamic characteristics,birch forest,Xiao xinganling
