Abstract:Grass planting pavement has been widely used in urban roads, parks, and parking lots in recent years due to its composite structure of plant-soil-permeable filler. Many scholars have extensively studied its ecological and environmental functions in enhancing infiltration, reducing urban surface runoff, purifying water quality, and adjusting the microclimate of the local ecosystem. However, we had little knowledge about its effects on the organism communities and species diversity, even though it is of great significance to the comprehensive management and planning of the urban ecosystem. Therefore, based on field sampling and investigation, we carried out this study to quantitatively analyze the community composition and species diversity of the vegetation and soil macrofauna in the urban grass planting pavement in 9 sites of Xintai City, Shandong Province, and discuss the ecological effects of the grass planting pavement. A total of 22 species of herbaceous plants in 14 families, 22 genera were recorded in the study. With the highest relative abundance and biomass, Eleusine indica was the dominant species of vegetation in the grass planting pavement in Xintai City. The average abundance and biomass of the vegetation in the grass planting pavement was (21.87±2.15) shoots/m2 and (4.15±0.45) g/m2. There were significantly spatial differences in the shoot density (F=2.671, P<0.05) and stem height (F=2.748, P<0.05) among different sampling sites. Nevertheless, the differences in the vegetation biomass and coverage among different sites were not significant (P>0.05), though significant differences existed in the pairwise comparison between sites by the Least Significant Difference (LSD) analysis. The species diversity of vegetation at different sites also varied significantly, the lowest value appeared in the grass planting pavement of the hospital parking lot. A total of 10 species in 7 orders, 8 families of the soil macrofauna were recorded in the survey. Formicidae was the dominant group of the soil macrofauna communities in the grass-planting pavement transects. Only two species of soil macrofauna were recorded in the porous pavement transect of all sites. The abundance and biomass of the soil macrofauna in grass planting pavement transect were significantly higher than that in porous pavement (P<0.05). The results of stepwise regression analysis showed that the community characteristics of vegetation and soil macrofauna significantly correlated to the soil physiochemical properties, such as bulk density and water content. The biomass (R2=0.810, P<0.05) and coverage (R2=0.819, P<0.001) of the vegetation in the grass planting pavement had the strongest correlations with the biomass and abundance of the soil macrofauna. The study showed that the grass planting pavement could effectively increase the abundance, biomass, and diversity of the vegetation and soil macrofauna communities in the urban ecosystem. This effect is a direct and indirect synergy of multiple factors, such as trampling frequency, soil texture, water content and some other biological factors. On the basis of long-term monitoring, systematic and comprehensive studies should be carried out in combination with environmental factors in the future to systematically explore the ecological effects of the grass planting pavement and provide a scientific basis for the further efficient and reasonable utilization of the grass planting pavement.