2.6 Planning of wild tending area
To serve the wild tending action of T. chinense under climate change and land use change, the grassland types in 2015, 2050, 2070, and 2090 were superimposed to obtain grass stability region this century. Considering the prohibition of the development of nature reserves, the existing protection areas in China were removed from the current high suitable areas. By using the core area zonation algorithm in ZONATION4.0 software (https://www.helsinki.fi/), the layers of the high suitable areas in different climate scenarios in the grass stability region were superimposed. The weight of each layer was set to 1, and other parameters were the default values (B. Chen et al., 2023; B. Zhang et al., 2023). The natural discontinuity method was used to classify the output layers from 0 to 1, and the wild tending areas with low, medium, and high suitability of T. chinense were obtained.