关键词: 土壤养分, 空间异质性, 生态系统, 景观性质

Abstract: This paper studied the variations of glucose concentration in haemolymph and glycogen concentration in hepatopancreas and muscle of Marsupenaeus japonicus under starvation and re-feed-ing. Groups C, S₁, S₂ and S₃ were deprived of food for 0, 10, 15 and 25 days, respectively, and then re-fed for 10days. Under starvation, the glucose concentration in haemolymph and glycogen concentration in hepatopancreas decreased rapidly at the beginning, and the glycogen concentration in muscle was the lowest after 10-day fasting. In the following 5 days, the glucose concentration in haemolymph and glycogen concentration in hepatopancreas and muscle recovered to their initial levels due to gluconeogenesis, but the glycogen concentration kept declining with fasting. After re-feeding, the glycogen concentration in hepatopancreas and muscle recovered well, and the glucose concentration in haemolymph had a sharper increase in groups S₁ and S₂ than in group C, but was markedly less in group S₃ than in group C. These results indicated that long-term starvation had a greater effect on the glucose concentration in haemolymph.

Key words: Soil nutrients, Spatial heterogeneity, Ecosystem, Landscape characteristics