Abstract: Based on field investigation and employing two-way indicator species analysis (TWINSPAN) and canonical correspondence analysis (DCCA),this paper classified and collated the Pinus sylvestris community on Honghuaerji sandy land.Quantitative analysis was carried out on the spatial pattern of the community and its relationship with environmental factors.The results showed that P.sylvestris community could be classified into 6 types.Altitude,physiognomy,canopy of community,overall contents of soil C and N,and chest area of arbor influenced the plant community and its spatial pattern distinctly.The spatial pattern of the community species presented obvious collective pattern in DCCA taxis,which could be divided into different swarm and reflect significant correlation with environmental factors.Environmental factors contributed to the vegetation distribution pattern were quantitatively analyzed,among which,topography was the strongest variable.The reasons which were not able to explain were discussed.

Key words: Coelomactra antiquata, Oxygen consumption rate, Ammonia-N excretion rate