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Riparian areas are the transitional zones between terrestrial and aquatic ecosystems. Riparian have been experienced serious river channelization, riparian hardening and other anthropogenic activities. These disturbances result in degradation of ecological function and reduction of biodiversity of riparian ecosystems. There are many ecological engineering to restore riparian ecosystems in China. The research results of this article indicate that species richness and the Shannon-Wiener diversity index were: restored sites > natural sites > channelized sites, and biomass of natural sites was significantly lower than that of restored and channelized sites. The reason is that river channelization severely changed the composition and structure of plant communities and decreased plant diversity in riparian zone. Practicable ecological restoration measures could effectively reconstruct the plant communities and improved plant diversity in the channelized riparian zones.
Jiang et al. (Mon,) studied this question.