Chorthippus dubius (Zub.) is a dominant species of grassshopper in northwestern pasture of China. The present paper deals with the energy flow through the grasshopper populations in three different plant communities representing different degree of degradation in Inner Mongolian grassland. Results indicated that the amount of energy consumed and assimilated from the net production of aboveground vegetation was of the order of 0.21%-1.03% consumed and 0.1%-0.59% assimilated. Additional 0.21%-1.93% of this pr...