Fig. 5

aLocation map of the study site. The research site is located in Haidian Park (The map of Haidian Park is downloaded from 360 Map Natwork:https://ditu.so.com/?pid=10d2573a0e802bb5&src=onebox. The boundary of the area is automatically generated by 360 map website, and we have not made any changes.).bThe experimental design diagrams. CK: Without warming; T1: Moderate warming; T2: Severe warming.cSchematic diagram of the warming device. The infrared heater is installed in the center of the woodland and is equipped with an automatic rotating device