Research on constitute and ecological function of garden plants communities.

we have investigated the new landscape plant communities in park and green space in Songjiang district of Shanghai, and measured the temperature and humidity and the concentration of negative ions. Also we compared and analyzed the ecological functions of plant communities and the factors of the variations. The result showed that the highest eco-efficiency of the plant community turned up from 10:00 to 14:00, the plant community with higher dominance index had higher eco-efficiency, the intensive plant communities had better eco-efficiency than the scattered ones.