| 长江靖江段近岸小型渔业生物碳氮稳定同位素特征分析 |
| |
| 引用本文： | 俞雅文,徐东坡,王媛,徐跑.长江靖江段近岸小型渔业生物碳氮稳定同位素特征分析[J].长江流域资源与环境,2017,26(12):2091-2098. |
| |
| 作者姓名： | 俞雅文 徐东坡 王媛 徐跑 |
| |
| 作者单位： | (1.南京农业大学无锡渔业学院，江苏 无锡 214081；2.农业部长江下游渔业资源环境科学观测实验站，;
中国水产科学研究院淡水渔业研究中心, 江苏 无锡 214081) |
| |
| 基金项目： | 江苏省自然科学基金-面上研究项目:长江江苏段中华绒螯蟹栖息地和适合度评价(BK20131088)(Project of Jiangsu Natural Science Foundation of China(BK20131088))，农业部物种(渔业)资源保护项目-长江下游鲢鳙中华绒螯蟹增殖放流效果跟踪(22130135037)(USDA Species (Fisheries) Resource Conservation Project(22130135037)) |
| |
| 摘 要： | 长江靖江段是众多洄游性渔业生物的重要栖息地,为进一步的研究和渔业资源评估提供基础生物学资料、掌握该水域食物网结构特征,应用碳、氮稳定同位素技术测定了2016年8月在长江靖江段近岸采集的蟹类、小型鱼类、虾类等渔业生物样品的δ~(13)C值和δ~(15)N值,并由此构建了所采集的各类渔业生物的连续营养谱。结果表明:长江靖江段近岸各类生物中浮游动物的δ~(13)C值最低,为-30.34‰;其次是底栖碎屑的-30.24‰;贝类、水生植物类、鱼类和虾类居中,它们的δ~(13)C值均值分别为-29.75‰±0.75‰、-28.98‰±0.88‰、-26.74‰±2.37‰、-26.1‰±0.16‰;蟹类最高,为-25.86‰±0.74‰。水生植物类的δ~(15)N均值最低,为5.16‰±0.85‰;底栖碎屑其次,为5.58‰;贝类、鱼类、浮游动物和蟹类的δ~(15)N值均居中,δ~(15)N均值分别为8.13‰±0.31‰、11.56‰±1.59‰、12.02‰和12.51‰±1.43‰;虾类的δ~(15)N均值最高,为13.05‰±0.45‰;营养级由低到高依次为:水生植物类、底栖碎屑、贝类、浮游动物、小型鱼类、蟹类和虾类。近岸水域的小型鱼类、蟹类和虾类拥有着比较接近的食物源,生态位重叠较为明显。
|
| 关 键 词： | 碳氮稳定同位素 靖江段近岸 小型渔业生物 营养级 |
TROPHIC RELATIONSHIPS BASED ON SMALL-SCALE FISHERIES IN THE NEARSHORE ZONE OF JINGJIANG,YANGTZE RIVER:δ13C AND δ15N STABLE ISOTOPE ANALYSIS |
| |
| YU Ya wen,XU Dong po,WANG Yuan,XU Pao.TROPHIC RELATIONSHIPS BASED ON SMALL-SCALE FISHERIES IN THE NEARSHORE ZONE OF JINGJIANG,YANGTZE RIVER:δ13C AND δ15N STABLE ISOTOPE ANALYSIS[J].Resources and Environment in the Yangtza Basin,2017,26(12):2091-2098. |
| |
| Authors: | YU Ya wen XU Dong po WANG Yuan XU Pao |
| |
| Institution: | (1.Nanjing Agricultural University Wuxi Fisheries College, Wuxi 214081, China; 2. Scientific Observing and Experimental Station of;
Fishery Resources and Environment in the Lower Reaches of the Changjiang River, MoA，Freshwater Fisheries Research ;
Center of Chinese Academy of Fishery Sciences，Wuxi 214081, China) |
| |
| Abstract: | Jingjiang section of Yangtze River is host to plenty of migratory fishes.For the sake of grasping the characteristics of food web structure in the nearshore zone of Jingjiang section,together with providing basic biological data for further study and fishery resource assessment,this study employed stable isotope technique ofcarbon and nitrogen to detect the δ13C and δ15N values of each biological sample collected there in August 2016 and constructed the continuous trophic spectrum of crabs,small fishes,shrimps and other fishery creatures.As the results revealed,the δ13C value of zooplankton was-30.34‰ and the lowest,followed by the benthic clastic of-30.24‰.The average δ13C values of shellfish,aquatic plants,small fishes and shrimps were-29.75‰±0.75‰,-28.98‰± 0.88‰,-26.74‰± 2.37‰ and-26.1‰± 0.16‰,respectively.Crabs owned the highest δ13C value of-25.86‰±0.74‰.The δ15N value of aquatic plants was 5.16‰±0.85‰ and the lowest,and benthic clastic of 5.58‰ in the next place.The average δ15N values of shellfish,small fishes,zooplankton and crabs were 8.13‰±0.31‰,11.56‰± 1.59‰,12.02‰ and 12.51‰± 1.43‰,respectively.Shrimps possessed the highest δ15N value of 13.05‰±0.45‰.The order of trophic level was aquatic plants,benthic clastic,shellfish,zooplankton,small fish,crabs and shrimps from low to high.Small fishes,crabs and shrimps in this part of water area shared the similar food source while the stable isotope values suggested an obvious overlap in trophic niche among them. |
| |
| Keywords: | carbon and nitrogen stable isotopes Jingjiang nearshore small fishery organisms trophic level |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《长江流域资源与环境》浏览原始摘要信息 |
| 点击此处可从《长江流域资源与环境》下载免费的PDF全文 |
|
