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于1992年9月—1994年5月先后对快山湾海域作了7个航次调查。由实验室培养试验和现场采样分析两种方法得出食物链一个营养级的13C富集度分别为（1．6±0．2）×10-3和1．7×10’，两者几乎一致。由7个季度月的现场采集样品的同位素分析结果表明，从处在食物网底部的浮游植物到最高级的肉食性鱼类之间13C差值平均为6．9×10-3，相当于5个营养级；并由各类生物的碳同位素数据分别确定了它们在该食物网中的营养位置，其结果与食性分析方法所得结果基本吻合。同位素示踪方法研究的结果还表明，崂山湾水体生物食物网中碳的来源主要是浮游植物碳。
From September 1992 to May 1994, he made seven voyages surveys to the Bay of Fast Bay. The 13C enrichment of one trophic level in the food chain was (1.6 ± 0.2) × 10-3 and 1.7 × 10 ’respectively, which were almost the same by laboratory cultivation test and field sampling analysis . The isotope analysis of samples collected from the field at seven seasons showed that the 13C difference from phytoplankton at the bottom of the food web to the highest carnivore fish averaged 6.9 × 10-3, equivalent to 5 Trophic level. The carbon isotope data of all kinds of organisms determined their nutrient position in the food web respectively. The results are in good agreement with those obtained by the method of food analysis. The results of the isotope tracer method also show that the source of carbon in Laoshan Bay Biomass Food Network is mainly phytoplankton carbon.