Chin J Plan Ecolo ›› 2007, Vol. 31 ›› Issue (3): 451-456.doi: 10.17521/cjpe.2007.0055

• Research Articles • Previous Articles     Next Articles

IMPACTS OF URBAN RIVER RECONSTRUCTION ON NATIVE VASCULAR PLANTS IN A CHINESE RIVER ECOSYSTEM

WANG Ying-Gang1,2; ZHANG Qiu-Hua2; ZHANG Feng1,2*; ZHU Yu-En2   

  1. 1Institue of Loess Plateau, Shanxi University, Taiyuan 030006, China; 2 School of Environment and Resources, Shanxi University, Taiyuan 030006, China
  • Online:2007-05-30 Published:2007-05-30
  • Contact: ZHANG Feng

Abstract:

Aims Some urban river segments are reconstructed, resulting in benefits as well as ecological problems including reduced species diversity and altered species composition. Therefore, better understanding of the ecological impacts of urban river reconstruction projects is important for effectively protecting river ecosystemsin future projects.
Methods We studied a 4.2 km river reconstruction project of Fenhe River in Taiyuan, using 30 random sample plots before (1997) and after (2003) reconstruction. We examined impacts of the project on species diversity, frequency and community similarity of native vascular plants using the Shannon-Weiner index, Srensen index and one-factor analysis of variance.
Important findings Species richness and Shannon-Weiner index values decreased after reconstruction. In addition, the number of low frequency species increased, the number of high frequency species decreased and the similarity of species composition before and after reconstruction was low. Therefore, the impacts of this urban river reconstruction project on the species diversity, frequency and community similarity of native vascular plants were substantial.

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