Preliminary studies on trophic structure of tidal zone in the Laoshan Bay by using carbon stable isotopes

CAI De-ling; HONG Xu-guang; MAO Xing-hua; ZHANG Shu-fang; HAN Yi-bing; GAO Su-lan

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Article Navigation > Haiyang Xuebao > 2001 > 23(4): 41-47

CAI De-ling, HONG Xu-guang, MAO Xing-hua, ZHANG Shu-fang, HAN Yi-bing, GAO Su-lan. Preliminary studies on trophic structure of tidal zone in the Laoshan Bay by using carbon stable isotopes[J]. Haiyang Xuebao, 2001, 23(4): 41-47.

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Preliminary studies on trophic structure of tidal zone in the Laoshan Bay by using carbon stable isotopes

First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

Received Date: 1999-12-21
Rev Recd Date: 2000-05-08

Abstract

Abstract

By analyses of stable carbon isotopic composition (δ¹³C values) of the benthos collected in the Laoshan Bay in August 1993 and February and May 1994, it is found that the main food sources of the benthos can be divided into four groups in terms of stable carbon isotopic composition: POM, benthic diatoms, benthic macroalgae and the organic matter in sediments.The results show that the stable carbon isotopic compositions of the benthic animals has a close relation with that of the food they take in.The stable carbon isotopic compositions of benthos may be useful in elucidating their food sources.The carbon isotopic data confirm that POM is the main food source of the benthic filter feeders such as bivalves; crustaceans have a wide range of δ¹³C values, showing that their food source has diversity; benthic diatoms are an important fraction of the food for most of gastropods.A preliminary investigation of the benthic-pelagic coupling in the Laoshan Bay using the stable carbon isotopic tracers confirms the importance of POM as a food source for benthos in this region, but the organic matter in sediments and benthic diatoms are also relative important for a lot of benthic animals.
- carbon isotopes,
- food web,
- benthos,
- trophic level

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References(15)

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