崂山湾潮间带食物网结构的碳稳定同位素初步研究

蔡德陵; 洪旭光; 毛兴华; 张淑芳; 韩贻兵; 高素兰

崂山湾潮间带食物网结构的碳稳定同位素初步研究

国家海洋局第一海洋研究所, 山东青岛266061

基金项目: 国家自然科学基金资助项目(39170172)

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出版历程
- 收稿日期: 1999-12-21
- 修回日期: 2000-05-08

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

摘要

摘要: 通过对1993年8月和1994年2和5月在崂山湾潮间带采集的底栖生物碳稳定同位素组成(δ¹³C值)的分析,发现该区底栖动物的主要食物来源以δ¹³C值大致可划分为4类:水体中的颗粒有机质(POM)、底栖硅藻、大型底栖藻类和底泥中的有机物质(SOM).研究结果表明,底栖动物的碳稳定同位素组成与其所摄食的食物的碳稳定同位素组成有密切的关系,因此,底栖动物的碳稳定同位素组成可以用于研究其食物来源.碳稳定同位素数据证实,双壳类等滤食性动物的食物来源主要是POM;甲壳动物的δ¹³C值的范围较大,证明其食物来源的多样性;底栖硅藻是多数腹足类食物来源的相当重要组成部分.用碳稳定同位素示踪剂对该区底栖-水体耦合作用的初步研究表明,水体中的POM是底栖动物的重要食物来源,但底泥中有机质和底栖硅藻也是许多底栖动物食物来源的相当重要的组成部分.
- 碳同位素 /
- 食物网 /
- 潮间带 /
- 营养层次
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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参考文献(15)

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