Study on the effects of grazing on the stability of grassland ecosystem resilience
Grassland ecosystems,the most important of all terrestrial ecosystems,are under increasing threat.The most influential factor is grazing.In order to protect grassland ecosystem,the influence of grazing on the stability of grassland ecosystem resilience was stud-ied.Based on the expression form and transmission path of grazing on the stability of grassland ecosystem resilience,the influence mecha-nism of grazing on grassland ecosystem was discussed.The internal mechanism of resilience stability was analyzed for the first time through the review of existing literature,and then the influence of grazing on grassland ecosystem was discussed through the intermediate transmis-sion of species diversity,complexity and soil properties.Then,the relationship between the internal and external factors of grassland eco-system and the stability of resilience was studied,and the direct and indirect effects of grazing on the stability of grassland ecosystem were obtained qualitatively.The results showed that species diversity and species complexity would increase under light and moderate grazing,and these factors were positively correlated with the stability of grassland ecosystem resilience,thus improving the stability of grassland eco-system resilience.However,the results of grazing on soil properties are inconsistent,and most of the results show that no grazing or light grazing can increase soil nutrients and water content.Therefore,moderate grazing has a positive impact on the stability of ecosystem resili-ence.At the same time,it is also found that there are inconsistent views on the effects of grazing on PH in soil physical and chemical prop-erties.In the future,we can focus on studying the reasons for the differences in the research results of different scholars from this perspec-tive,so as to find a consistent view on the effects of grazing on soil physical and chemical properties.