[Community structure organization and its relation with environmental factors of sown grassland in South China]

Contribution of environmental factors, spatial factors, biological and random factors to community structure within a man-made grassland in southern terra was partitioned using canonical correspondence analysis. Under mowing and grazing, environmental factors explained (27.4% and 25.9%) variation of community structure. Contribution of spatial factors was 32.5%, 24.2%, respectively. Contribution of biological and random factors was 48% and 56%, respectively. Gradient in community structure and species abundance is evident along environmental gradient in mowing grassland. The environment-community/species relations were more complex in grazed grassland. Patches under different grazing intensity develop toward different directions.