Environmental factors
We recorded air temperature and humidity data at a half hour frequency using a thermo-logger (DS1923Hygrochron®iButton®, Maxim, CA, USA) from April 2018 to May 2019, and the duration was the same as the period of insect collection. The environment data logger device was fixed along with the one of the five canopy FITs in each transect. In total, we used seven variables including annual mean temperature (AMT), annual mean humidity (AMH), annual temperature range (ATR), annual humidity range (AHR), maximum temperature of the warmest month (MTWM), minimum temperature of the coldest month (MTCM), and average elevation (ELE) of each transect as the main environmental filter factors. These data were assembled as a secondary environment matrix prepared for canonical redundancy analysis RDA and detailed data information is listed in Table S1.1.