Effects of temperature,humidity and rainfall on activity intensity of rodents
As both seed predators and dispersers,rodents play an important role in seed fate and seedling establishment.Therefore,investigating the activity of rodents and its influencing factors will provide us a better understanding of the effects of rodents on forest regeneration.We investigated the activity intensity of rodents in the 20 ha forest dynamic plot in Ailaoshan National Nature Reserve,Yunnan Province,by infrared-camera traps(6486 camera days in total),and analyzed the effects of temperature,humidity and rainfall on the activity intensity of rodents at different time scales(including season,day and hour scales).The results showed that the activity intensity of rodents during the day in June was significantly higher than that in August and November,while the activity intensity of rodents at night in June was lower than that in August and November.At the day-scale,the activity intensity of rodents during the day increased significantly with the increase of temperature and the decrease of humidity and rainfall,while the activity intensity of rodents at night did not change significantly.At the hour-scale,temperature,humidity and rainfall had significant effects on the activity intensity of rodents during the day,but less on the activity intensity of rodents at night.Our study showed that the effects of temperature,humidity and rainfall on the activity intensity of rodents differed at different time scales.Exploring the response of rodent activity intensity to the environmental factors at different time scales will help us to better understand the activity rhythm and ecological function of rodents.
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