Lobose Testate Amoeba Difflugia, a worldwide distributed genus with its remarkable size and prey species, are critical plankters which link the classic food chain to the microral loop in the water column. To recognise its prey species and its predation mechanism, a field study, including statistical study and direct live observation was carried from May, 2006 to December, 2007 in Liuxihe Reservoir, Guangdong Province, with several coexisting Difflugia, and D. tuberspinifera as the dominant species in the water column. Both live observation and fixed samples from fields indicated that soft body rotifers, such as Collotheca sp. and Conochilus dossuarius are preferred food for D. tuberspinifera, but C. dossuariu might not be captured easily by D. tuberspinifera because of the colonying behavior. Keratella cochlearis can also be successfully handled by D. tuberspinifera by tearing up the strong lorica. However, the handling time was much longer than the soft body rotifers which might prevent it from been frequently caught. D. tuberspinifera might have direct trophic cascade effect toward Collotheca in the water body.
望甜, 韩博平*. 流溪河水库中瘤棘砂壳虫的摄食食物种类研究[J]. , 2008, 27(5): 398-401.
WANG Tian, HAN Bo-ping. Food selectity of Difflugia tuberspinifera in Liuxihe Reservoir, South China. , 2008, 27(5): 398-401.
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