摘要
中上层游泳动物具有较强的微量元素富集能力,通过食物链的生物放大作用,其体内富集的微量元素会传递到高营养级生物体内。为了解西北太平洋中上层游泳动物肌肉微量元素赋存特征,采集西北太平洋远东拟沙丁鱼(Sardinops sagax)、三棘若蛇鲭(Nealotus tripes)、鳀(Engraulis japonicus)、北方拟黵乌贼(Gonatopsis borealis)、发光柔鱼(Eucleoteuthis luminosa)和日本爪乌贼(Onychoteuthis borealijaponica)等6种中上层游泳动物样品,测定其肌肉中必需微量元素B、Cr、Mn、Fe、Co、Cu、Zn、Se的含量以及碳氮稳定同位素比值,采用聚类分析、皮尔逊相关分析、主成分分析以及营养放大系数(trophic magnification factor,TMF)等方法揭示微量元素赋存的物种差异、元素之间的相关性和来源以及微量元素与营养级相关性与传递规律。结果表明,西北太平洋6种游泳动物体内必需微量元素含量都遵循Fe>Zn>Cu>Mn>Se>Cr>B>Co的规律,鱼类体内Cr、Mn、Fe、Co和Zn含量明显高于头足类;微量元素在中上层游泳动物物种之间的赋存差异明显(P<0.05),Zn和Mn两个微量元素在3种鱼类(远东拟沙丁鱼、三棘若蛇鲭和鳀)中均存在显著正相关关系;鱼类和头足类体内的Zn、Co、B、Cu和Fe主要是摄食获取,而Mn、Cr和Fe主要来源于栖息水体中;西北太平洋6种游泳动物的食物来源存在差异性(δ13C:-26.9‰~-17.8‰),营养级跨度大(1.7~3.7);Cr在西北太食物链存在生物放大效应(TMF>1),B、Co、Fe、Zn和Se在中上层游泳动物食物链存在显著生物减小效应(TMF<1),其浓度随着营养级的升高呈显著下降趋势(P<0.05)。研究结果可为该海域环境治理以及食品安全监管提供科学参考。
Marine pelagic nektons have strong micronutrient concentrating capacity,and through the biomagnification of food chain,the micronutrients concentrated in their bodies will be passed to organisms at higher trophic levels.Trace elements are important componerts of marine pelagic nektons,playing key functions in the bone formation,sustaining the stability of internal environment,maintaining the normal metabolism and promoting growth and development of marine fish.In order to understand the characteristics of muscle trace elements enrichment in several species in the Northwest Pacific Ocean,six species of pelagic nektons in the area were collected(Sardinops sagax,Nealotus tripes,Engraulis japonicus,Gonatopsis borealis,Eucleoteuthis luminosa and Onychoteuthis borealijaponica)from June to August,2022 by research vessel“Songhang”and analyzed to characterize the distribution of essential trace elements B,Cr,Mn,Fe,Co,Cu,Zn,and Se in their muscles and their transfer patterns in food chain.Cluster analysis,Pearson's correlation method,principal component analysis and trophic magnification factor(TMF)were used to analyze the species differences in trace elements,correlation and source of the elements,and the relationship between trace elements and trophic levels,and their transmission patterns.The results showed that the pattern of Fe>Zn>Cu>Mn>Se>Cr>B>Co was followed in all 6 pelagic nektons,and the contents of Cr,Mn,Fe,Co and Zn were significantly higher in fishes than in cephalopods.Differences in the distribution of trace elements among pelagic nektons were more pronounced.Zn and Mn were significantly positively correlated in all fish species,and the main source of Zn,Co,B,Cu,and Fe in fishes and cephalopods minght be food,while the main source of Mn,Cr,and Fe might be seawater.The six pelagic nektons in this study had a wide range of food sources(δ13C ranged from-26.9‰to 17.8‰andδ15N ranged from 5.6‰to 10.8‰)and a large number of trophic levels(1.7 to 3.7)in the NWP food chain,and the TMF>1 for Cr indicated
作者
冷甜甜
王欣
刘必林
谢婧倩
LENG Tiantian;WANG Xin;LIU Bilin;XIE Jingqian(College of Marine Living Resource Sciences and Management,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Sustainable Exploitation of Oceanic Fisheries Resources,Ministry of Education,Shanghai Ocean University,Shanghai 201306,China;National Engineering Research Center for Oceanic Fisheries,Shanghai Ocean University,Shanghai 201306,China;Key Laboratory of Oceanic Fisheries Exploration,Ministry of Agriculture and Rural Affairs,Shanghai 201306,China;College of Marine Ecology and Environment,Shanghai Ocean University,Shanghai 201306,China)
出处
《海洋渔业》
CSCD
北大核心
2024年第4期412-424,共13页
Marine Fisheries
基金
上海市高校特聘教授“东方学者”岗位跟踪计划项目(22GZ03)
农业农村部全球渔业资源调查监测评估专项(公海渔业资源综合科学调查)。
关键词
游泳动物
必需微量元素
食物链放大因子
西北太平洋
元素赋存
pelagic nektons
essential trace elements
trophic magnification factor
Northwest Pacific Ocean
element occurrence
