Welcome to Chinese Journal of Applied Ecology! Today is Share:

Chinese Journal of Applied Ecology ›› 2005, Vol. 16 ›› Issue (12): 2231-2235.

Previous Articles     Next Articles

Niche characteristics of dominant populations of Sophora davidii community in loess gully region

LI Dengwu, ZHANG Wenhui, REN Zhengzheng   

  1. Northwest Sci-Tech University of Agriculture and Forestry, Yangling 712100, China
  • Received:2004-08-23 Revised:2005-01-18 Online:2005-12-15 Published:2005-12-15

Abstract: Based on field investigation data and employing Levin and niche proportional similarity formulae,this paper calculated the niche breadth,niche proportional similarity,and niche overlap of 13 dominant species of Sophora davidii community in loess gully region.The results showed that the niche breadth of the dominant populations of Sophora davidii community decreased in order of Sophora davidii(0.964),Artemisia giraldii(0.775),Artemisia gmelinii(0.664),Themeda triandra var.japonica(0.508),Polygala tenuifolia(0.485),Setaria viridis(0.399),Cynodon dactylon(0.393),Bothriochloa ischaemum(0.327),Lespedeza davurica(0.321),Stipa bungeana(0.472),Periploca sepium(0.292),Clematis fruticosa(0.251),and Cleistogenes squarrosa(0.234).The niche proportional similarity between Sophora davidii and other species was 0.21~0.76,while the niche overlap was not high,which meant that there was no severe competition between them.It could be concluded that Sophora davidii was the dominant population in the community,with most resources utilization and most adaptability to the ecosystem.

Key words: Sophora davidii community, Dominant population, Niche breadth, Niche overlap, Loess gully region

CLC Number: