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• 研究报告 • 上一篇    下一篇

节肢动物体内汞、硒分布及食物链传递特征

ABEYSINGHE Kasun1,2,敖明3,GOODALE Eben4,杨效东1,徐晓航2,5 ,许志东2,5,仇广乐2   

  1. (1中国科学院西双版纳热带植物园, 云南勐腊 666303; 2中国科学院地球化学研究所环境地球化学国家重点实验室, 贵阳 550081; 3贵州大学资源与环境工程学院, 贵阳 550025; 4广西大学林学院, 南宁 530005; 5中国科学院大学, 北京 100049)
  • 出版日期:2016-04-10 发布日期:2016-04-10

Mercury and selenium in arthropods and their bioaccumulation across food webs.

ABEYSINGHE Kasun1,2, AO Ming3, GOODALE Eben4, YANG Xiao-dong1, XU Xiao-hang2,5, XU Zhi-dong2,5, QIU Guang-le2*
  

  1. (1Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, Yunnan, China; 2State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China; 3College of Resource and Environmental Engineering, Guizhou University, Guiyang 550025, China; 4College of Forestry, Guangxi University, Nanning 530005, China; 5University of Chinese Academy of Sciences, Beijing 100049, China)
    .
  • Online:2016-04-10 Published:2016-04-10

摘要: 选择贵州万山汞矿区及雷山参考点,采集了7属9种陆生常见节肢动物,分析了其体内的汞、硒和δ13C、δ15N含量特征,探讨了联合暴露下硒、汞在陆生食物链的传递规律。结果表明:参考点节肢动物体内汞、硒平均含量分别为157±329和190±277 ng·g-1,显著低于汞矿区汞、硒的平均含量5692±1472和2220±691 ng·g-1;无论是汞矿区还是对照区,肉食性动物体内汞含量显著高于植食性动物,表现出显著的生物积累与放大效应;而硒在肉食性与植食性动物之间没有显著差异,表明硒在节肢动物体内不具有生物积累放大效应。在自然背景条件下,节肢动物体内硒含量与汞含量呈显著正相关(r=0.983,P<0.001),硒、汞摩尔比接近2∶1,同时节肢动物体内汞含量与δ15N含量呈正相关(r=0.434, P<0.001),而与δ13C关系不明显,表明动物体内δ15N较δ13C更能反映捕食与被捕食营养关系。

关键词: 产业结构, 吉林省, 时空格局, 生态化

Abstract: Seven different types of arthropods, including nine species, were collected from Wanshan mercury (Hg) mining region and Leishan control site for Hg and selenium (Se) analysis. Stable isotopes δ13C and δ15N were also measured. Results showed that average concentrations of Hg and Se in arthropods were 157±329 and 190±277 ng·g-1 in Leishan, respectively, which were much lower than the 5692±1472 ng·g-1 for Hg and 2220±691 ng·g-1 for Se in Wanshan. Mercury concentrations in carnivorous species were significantly higher than those of herbivorous animals from both Hg mining region and control site, demonstrating Hg’s ability to bioaccumulate across food webs. However, Se did not show bioaccumulation in arthropods. A significant positive correlation (r=0.983, P<0.001) between Se and Hg was observed in samples collected from the control site with a molar ratio of 2∶1, but such a relationship was not found in the Hg mining region. A positive correlation (r=0.434, P<0.001) between δ15N with Hg showed that δ15N could better reflect the relationship among predators and prey than δ13C did.

Key words: industrial structure, ecologicalization, spatio-temporal pattern, Jilin Province