Plant Competition Model Based on Self-Inhibition and Drought

Abstract

Continued global warming has led to frequent droughts in many parts of the world. Drought has a large impact on plant communities in ecosystems everywhere, and therefore the adaptation of plant communities to drought will be critical to their future development and survival. This paper focuses on two key questions: first, how plant community populations change under the influence of dry weather and how plants adapt to dry environments. Second, how the succession of dominant populations affects the biodiversity within that plant community and what the biomass is when the community state is stable. In this paper, a grassland community dynamics system model based on population numbers and environmental resources is established, while precipitation is selected as a key indicator to study the effects of dry weather. Finally, the differential equation for the change of plant population with dry weather is derived. Through analyzing the relationship between total biomass, critical available resources and number of species, the optimal number of species when the plant community is stable is obtained.