中国水产科学Issue(1)：189-197,9.DOI:10.3724/SP.J.1118.2013.00189
应用氮稳定同位素技术研究辽东湾海域主要渔业生物的营养级
Trophic level analysis of key species in Liaodong Bay using stable nitrogen isotopes
摘要
Abstract
The stable nitrogen isotope ratio (δ15N) provides a powerful tool for estimating the trophic positions of consumers in food webs. We measuredδ15N in 28 fish species and 26 invertebrate species that were collected from Liaodong Bay in June and August, 2010. The trophic levels of these organisms ranged from 2.98 to 4.84, but were generally within the range of 3.70–4.56.δ15N values changed in a large proportion (50%) of fish between July and August, suggesting thatδ15N values vary among species and seasonally. The largest increase was in Raja porosa (1.06‰) and the biggest decrease was in Platycephalus indicus (1.84‰). Furthermore, δ15N values decreased in 87.5% of the invertebrates in August. The decrease in 6 invertebrate species was > 1‰ (37.5%), suggesting that invertebrates exhibit greater seasonal variation inδ15N than fish. We compared theδ15N values for 10 invertebrate species in the nearshore waters and offshore waters of Liaodong Bay to determine whether the inshore seawater environment and ecosystem is influenced by anthropogenic nitrogen inputs.关键词
辽东湾/氮稳定同位素/营养级/鱼类/无脊椎动物Key words
Liaodong Bay/stable nitrogen isotope ratio/trophic level/fish/invertebrate分类
生物科学引用本文复制引用
孙明,刘修泽,李轶平,董婧..应用氮稳定同位素技术研究辽东湾海域主要渔业生物的营养级[J].中国水产科学,2013,(1):189-197,9.基金项目
国家重点基础研究发展计划项目(2011CB403601) （2011CB403601）
海洋公益性行业科研专项项目(200905019) （200905019）
中国近海海洋综合调查与评价-908辽宁专项项目(LN-908-01-01-06) （LN-908-01-01-06）
