Abstract: Grassland biomass dynamics is a comprehensive reflection of community structure and function, and also an important research direction of ecology. The main interference factors that affect the grassland biomass dynamics were described and the relationships between the individual and population dynamics from qualitative and quantitative respects were demonstrated in this paper. The new concepts of composite biomass and composite growth dynamics based on the measurement indicators and estimation methods were given here, which may explain the influencing mechanism of the composite biomass dynamics for community productivity and stability. The research efforts on the interference effects of environmental factors on biomass dynamics and vegetation stability should be strengthened. In terms of major limiting factors or interference forms faced by specific communities, the research should cover the inner biological and ecological changes of the communities. The state variables studied should consider the comprehensive effects of multiple variables such as biomass and height. Revealing population and community biomass dynamic changes and their relationship with environmental factors at the individual level contributes to understanding the influencing mechanisms of environmental disturbances for plant community dynamics and stability, and thus providing a theoretical basis for the maintenance of grassland productivity.

Key words: big data, ecological environment, ecological network, climate change, air pollution