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运用稳定同位素技术研究大凌河、鸭绿江近岸海域春季主要生物种类的营养级

田甲申1,李多慧2,王摆1,周遵春1,鹿志创1,尤广然1,吴英超1   

  1. 1辽宁省海洋水产科学研究院, 辽宁省海洋生物资源和生态学重点实验室, 辽宁大连 116023; 2大连市水产研究所, 辽宁大连 116085)
  • 出版日期:2018-04-10 发布日期:2018-04-10

Assessment of the trophic level of main fishery species in coastal waters of Daling River and Yalu River based on stable isotope technique.

TIAN Jia-shen1, LI Duo-hui2, WANG Bai1, ZHOU Zun-chun1*, LU Zhi-chuang1, YOU Guang-ran1, WU Ying-chao1   

  1. (1Key Laboratory of Marine Biological Resources and Ecology Liaoning Province, Liaoning Ocean and Fisheries Science Research Institute, Dalian 116023, Liaoning, China; 2Dalian Fisheries Research Institute, Dalian 116085, Liaoning, China).
  • Online:2018-04-10 Published:2018-04-10

摘要: 应用稳定同位素技术测定了大凌河、鸭绿江近岸海域春季主要渔业生物的碳氮稳定同位素比值,计算主要生物种类的营养级,构建了河口近岸海域主要生物种类的连续营养谱。结果表明:大凌河、鸭绿江近岸海域主要生物的δ15N、δ13C值范围分别为8.2‰~14.1‰、-22.9‰~-16.6‰,7.9‰~13.2‰、-20.6‰~-16.1‰;大凌河口海域主要生物资源种类营养级范围为2.8~3.9,其中,甲壳类为2.9~3.5,腹足类为2.8~3.1,双壳类为2.9~3.4,鱼类为3.4~3.9;鸭绿江口海域主要生物资源种类营养级范围为2.8~3.7,其中,甲壳类为3.0~3.6,头足类为3.4~3.5,腹足类为2.8~3.0,双壳类为2.9~3.2,鱼类为3.1~3.7;连续营养谱显示,两个河口近岸海域初级消费者主要为泥螺、四角蛤蜊,两个河口近岸海域次级消费者主要为甲壳类,高级消费者同为鱼类。本研究初步建立了大凌河口、鸭绿江口近岸海域主要渔业生物的连续营养谱,为渔业资源的保护及开发利用提供基础数据。

关键词: 种子雨, 长白山, 针阔混交林, 年际变异, 空间变异

Abstract: We measured the abundance of carbon and nitrogen stable isotopes in the dominant fishery species in the coast of the Daling and Yalu rivers in spring with stable isotope technique, calculated the trophic levels, and established the continuous nutritional spectrum of the majorbiological groups. The results showed that the δ15N and δ13C of the dominant species ranged from8.2‰ to 14.1‰ and from -22.9‰ to -16.6‰, respectively in Daling River, while ranged from 7.9‰ to 13.2‰ and from -20.6‰ to -16.1‰ in Yalu River, respectively. The trophic level of the major biological groups in Daling River was between 2.8 and 3.9, with the crustacean, gastropod, bivalve and fish ranging 2.9-3.5, 2.8-3.1, 2.9-3.4 and 3.4-3.9, respectively. The trophic level of the major biological groups in Yalu River was between 2.8 and 3.7, with the crustacean, cephalopod, gastropod, bivalve and fish ranging 3.0-3.6, 3.4-3.5, 2.8-3.0, 2.9-3.2 and 3.1-3.7, respectively. The continuous trophic spectrum demonstrated thatBullacta exarataand Mactra veneriformis were the primary consumers in both rivers. Crustacean was the secondary consumer, and fishes were the senior consumers. This study established the continuous trophic spectrum of the major fishery species in the coast in Daling and Yalu rivers, and thus provided basic data for the conservation and development of fisheries resources.

Key words: seed rain, Changbai Mountains, mixed broadleaf-conifer forest, interannual variation, spatial variation.