分类群和体型对汞污染程度不同的两条河流中蜘蛛体内汞浓度的影响：将河岸蜘蛛用作哨兵的意义。

IF 3.6 4区环境科学与生态学 Q2 ENVIRONMENTAL SCIENCES Environmental Toxicology and Chemistry Pub Date : 2024-08-23 DOI:10.1002/etc.5968

Andrew C. Todd, Matthew M. Chumchal, Ray W. Drenner, Chris W. Allender, Benjamin D. Barst, Morgan T. Capone, Andrew P. Degges, Madeline P. Hannappel, Cale R. Perry, Robert A. Peterson, Tori L. Martinez, Iris E. Schmeder, Tyler T. Williams, Macyn G. Willingham

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引用次数: 0

摘要

由于汞（Hg）在大气中广泛沉积，所有水生食物网都受到有毒甲基汞（MeHg）的污染。高浓度的甲基汞会危害野生动物和人类的健康。在河岸栖息地觅食的蜘蛛（以下简称河岸蜘蛛）被认为是水生系统甲基汞污染的哨兵。河岸蜘蛛通过食物接触甲基汞，而蜘蛛体内的甲基汞浓度与食物中受甲基汞污染的新生水生昆虫的比例呈正相关。将蜘蛛用作哨兵是一项复杂的工作，因为它们体内的甲基汞浓度不仅会因生态系统的不同而变化，而且会因不同的蜘蛛类群和蜘蛛体型的不同而变化。本研究的目的是考察生态系统污染程度、蜘蛛类群和蜘蛛体型如何相互作用，影响来自两条汞污染程度不同的河流的四个河岸蜘蛛属的甲基汞浓度。我们从美国德克萨斯州沃斯堡的三一河清叉和三一河西叉沿岸的两个地点采集了四个属的河岸蜘蛛（Tetragnatha sp.、Larinioides sp.、Pardosa sp.和 Rabidosa sp.）。我们分析了各属不同体型蜘蛛体内的甲基汞浓度。我们发现，河流生态系统的甲基汞污染、蜘蛛类群和蜘蛛体型是决定河岸蜘蛛体内甲基汞浓度的重要因素。研究结果表明，本研究中的四个河岸蜘蛛类群中的任何一个类群都可以作为水生甲基汞污染的哨兵，但由于生态系统污染程度、蜘蛛类群和体型之间的相互依存关系，它们不应该被交替使用。未来利用河岸蜘蛛作为生物放大水生污染物（如甲基汞、多氯联苯）哨兵的研究应考虑生态系统污染水平、蜘蛛类群和蜘蛛体型之间潜在的复杂交互作用。环境毒物化学 2024;00:1-7。© 2024 作者。环境毒理学与化学》由 Wiley Periodicals LLC 代表 SETAC 出版。

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Effects of Taxon and Body Size on Mercury Concentrations in Spiders from Two Rivers with Different Levels of Mercury Contamination: Implications for the Use of Riparian Spiders as Sentinels

Due to widespread atmospheric deposition of mercury (Hg), all aquatic food webs are contaminated with toxic methyl mercury (MeHg). At high concentrations, MeHg poses a health hazard to wildlife and humans. Spiders feeding in riparian habitats (hereafter referred to as riparian spiders) have been proposed as sentinels of MeHg contamination of aquatic systems. Riparian spiders are exposed to MeHg through their diets, and the concentration of MeHg in spiders is positively related to the proportion of MeHg-contaminated emergent aquatic insects in their diets. The use of spiders as sentinels is complex because their MeHg concentrations can vary, not only among ecosystems but also between different spider taxa and as a function of spider body size. The objective of the present study was to examine how the level of ecosystem contamination, spider taxon, and spider body size interact to influence MeHg concentrations in four genera of riparian spiders from two rivers with different levels of Hg contamination. We collected four genera of riparian spiders (Tetragnatha sp., Larinioides sp., Pardosa sp., and Rabidosa sp.) from two sites along both the Clear Fork of the Trinity River and the West Fork of the Trinity River (Fort Worth, TX, USA). We analyzed concentrations of MeHg in different body sizes of spiders from each genus. We found that MeHg contamination of the river ecosystem, spider taxon, and spider body size were important determinants of MeHg concentration in riparian spiders. The results suggest that any of the four taxa of riparian spiders from the present study could be used as sentinels of aquatic MeHg contamination, but they should not be used interchangeably because of the interdependence between the effects of ecosystem contamination level, spider taxon, and body size. Future studies utilizing riparian spiders as sentinels of biomagnifying aquatic contaminants (e.g., MeHg, polychlorinated biphenyls) should consider the potentially complex interaction effects between ecosystem contamination level, spider taxon, and spider body size. Environ Toxicol Chem 2024;43:2169–2175. © 2024 The Author(s). Environmental Toxicology and Chemistry published by Wiley Periodicals LLC on behalf of SETAC.

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Environmental Toxicology and Chemistry 环境科学-毒理学

CiteScore

7.40

自引率

9.80%

发文量

265

审稿时长

3.4 months

期刊介绍： The Society of Environmental Toxicology and Chemistry (SETAC) publishes two journals: Environmental Toxicology and Chemistry (ET&C) and Integrated Environmental Assessment and Management (IEAM). Environmental Toxicology and Chemistry is dedicated to furthering scientific knowledge and disseminating information on environmental toxicology and chemistry, including the application of these sciences to risk assessment.[...] Environmental Toxicology and Chemistry is interdisciplinary in scope and integrates the fields of environmental toxicology; environmental, analytical, and molecular chemistry; ecology; physiology; biochemistry; microbiology; genetics; genomics; environmental engineering; chemical, environmental, and biological modeling; epidemiology; and earth sciences. ET&C seeks to publish papers describing original experimental or theoretical work that significantly advances understanding in the area of environmental toxicology, environmental chemistry and hazard/risk assessment. Emphasis is given to papers that enhance capabilities for the prediction, measurement, and assessment of the fate and effects of chemicals in the environment, rather than simply providing additional data. The scientific impact of papers is judged in terms of the breadth and depth of the findings and the expected influence on existing or future scientific practice. Methodological papers must make clear not only how the work differs from existing practice, but the significance of these differences to the field. Site-based research or monitoring must have regional or global implications beyond the particular site, such as evaluating processes, mechanisms, or theory under a natural environmental setting.

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