朗川公路若尔盖湿地段人工移栽草皮的群落生态学研究.pdf

14 2 Vol. 14 No . 2 2007 4 Research of Soil and Water Conservation Apr . , 2007* 1 1 1 1 2 陈 蓓 , 孙 辉, 秦纪洪, 马 睿, 蹇 依 ( 1. , 100 5; 2. , 10007) : 213 , , SSimpson Shannon- Wiener ; , , ; 30 cm 30 cm , 50 cm 50 cm 20 cm , Sq S M a , Berger- Parker : ; ; ; ; ; : S157; U412 :A : 2007) 0200 804 Community Biodiversity of Swarding Restoration Meadow for Highway Construction in the Zoige Wetland, NW Sichuan 1 1 1 1 2 CHEN Bei , SU N Hui , QIN Jihong , MA Rui , JIAN Yi ( 1. D ep ar tment of Env ir onmental Science and Eng ineer ing , S ichuan Univ ersity , Cheng du 100 5, China; 2. Sichuan Communication Survey ing and D es ig n I nstitute, Cheng d u 10007, China Abstract Community biodiversit y and diversity indices of sward rest orat ion meadow are determined primarily through the field investigation and onsite studies in t he Langchuan sect ion of a nat ional highw ay. T he results indicate that the species richness in dex, Simpson and Shannon- Wiener diversity indices, and evenness index of sward are obviously less than those of the back ground, w hile the dominant index is higher than that of background. T he dom inant and constructive species mainly belong to Gram ineae and Cyperaceae. Species diversity increases with t he thickness of sw arding pieces w hen the area is 30 cm 30 cm, and more large area is helpful to keep the community biodiversity. H ighest above and belowground biomass and density can be reserved w hen the area is 50 cm 50 cm and thickness is 20 cm. The results also show that there exist a positive relationsh