| Cai Deling,Hong Xuguang,Mao Xinghua,Zhang Shufang,Gao Sulan. 2000. A preliminary study on benthos food web structure of tidal zone in the Laoshan Bay by using stable carbon isotopes. Acta Oceanologica Sinica, (4):81－89 |
| A preliminary study on benthos food web structure of tidal zone in the Laoshan Bay by using stable carbon isotopes |
| A preliminary study on benthos food web structure of tidal zone in the Laoshan Bay by using stable carbon isotopes |
| Received:December 21, 1999 Revised:May 08, 2000 |
| DOI： |
| Key words:Carbon isotopes food web benthos trophic level |
| 中文关键词: Carbon isotopes food web benthos trophic level |
| 基金项目:This project was supported by the National Natual Science Foundation of China under contract No. 39170172. |
| Author Name | Affiliation | | Cai Deling | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | Hong Xuguang | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | Mao Xinghua | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | Zhang Shufang | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China | | Gao Sulan | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China |
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| Abstract: |
| By analyses of 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 carbon isotope composition:Particulate Organic Matter (POM),benthic diatoms, benthic macroalgae and the organic matter in sediments.The results show that the carbon isotopic composition of the benthic animals has a close relation with that of the food they take in.The carbon isotopic compositions of benthos may be useful in elucidating their food sources.The carbon isotopic data have confirmed that POM is the main food source of the benthic filter feeders such as bivalves; crustaceans have a wide range of δ13C values, showing 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 that region using the stable carbon isotopic tracers has confirmed the importance of POM as a food source for benthos in this region,but the organic matter in sediments and benthic diatoms are also relatively important for a lot of benthic animals.The benthic-pelagic coupling in the Laoshan Bay temperate ecosystem is not so tight as that in ecosystems at higher latitudes such as north-eastern water polynya. |
| 中文摘要: |
| By analyses of 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 carbon isotope composition:Particulate Organic Matter (POM),benthic diatoms, benthic macroalgae and the organic matter in sediments.The results show that the carbon isotopic composition of the benthic animals has a close relation with that of the food they take in.The carbon isotopic compositions of benthos may be useful in elucidating their food sources.The carbon isotopic data have confirmed that POM is the main food source of the benthic filter feeders such as bivalves; crustaceans have a wide range of δ13C values, showing 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 that region using the stable carbon isotopic tracers has confirmed the importance of POM as a food source for benthos in this region,but the organic matter in sediments and benthic diatoms are also relatively important for a lot of benthic animals.The benthic-pelagic coupling in the Laoshan Bay temperate ecosystem is not so tight as that in ecosystems at higher latitudes such as north-eastern water polynya. |
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