关键词: 非结构性碳水化合物, 水氮耦合, 沙地, 分配格局

Abstract: From June 2012 to May 2013, a monthly investigation was conducted to understand the annual variation of cladocera community structure (including species composition and standing crop) and related main affecting factors in the swine wastewater recycling system of Shanghai Agricultural Academy of Sciences. The results showed that a total of 22 species in 10 genera of 5 families were identified through the year. There were 7 dominant species, including Daphnia pulex, Moina macrocopa, and Ceriodaphnia cornuta. The mean annual density and biomass of the cladocera were 135.02 ind·L^-1 and 11.14 mg·L^-1, with peaking values in June and April and minimum values in January and July, respectively. The Shannon index, Pielou index, and Margalef index were higher in autumn and winter than in summer and spring. The Pearson correlation analysis showed that pH, dissolved oxygen, total nitrogen, total phosphorus and ammonia nitrogen were the main factors affecting the community structure of cladocera in the system.

Key words: sandy land, water and nitrogen coupling, allocation pattern, non-structural carbohydrate