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首页> 外文期刊>Environmental research >Changes in thyroid function of nestling tree swallows (Tachycineta bicolor) in relation to polycyclic aromatic compounds and other environmental stressors in the Athabasca Oil Sands Region
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Changes in thyroid function of nestling tree swallows (Tachycineta bicolor) in relation to polycyclic aromatic compounds and other environmental stressors in the Athabasca Oil Sands Region

机译：阿萨巴斯卡油砂地区雏鸟燕子（Tachycineta bicolor）的甲状腺功能与多环芳族化合物和其他环境胁迫的关系

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摘要

In the Canadian Athabasca Oil Sands Region (AOSR), nestling tree swallows (Tachycineta bicolor) raised near mining-related activities accumulated greater concentrations of polycyclic aromatic compounds (PACs) that contributed to their poorer condition, growth, and reproductive success. Here, we report changes in thyroid function of the same 14 day old (do) nestlings (N = 68) at these mining-related sites (051, OS2) compared to reference nestlings (REF1), and in relation to multiple environmental stressors that influence avian thyroid function. Thyroid function was compromised for OS1 nestlings but generally comparable between OS2 and REF1 chicks. In 2012, circulating total triiodothyronine (TT3) and thyroxine (TT4) were similar among all nestlings. The OS1 chicks had more active thyroid glands based on histological endpoints. Hepatic T4 outer-ring deiodinase (T4-ORD) activity was suppressed in OS1 and OS2 chicks. Despite inter-annual differences, OS1 chicks continued experiencing compromised thyroid function with significantly higher circulating TT4 and more active thyroid glands in 2013. The OS2 chicks had less active thyroid glands, which conceivably contributed to their suppressed growth (previously reported) relative to the heavier OS1 nestlings with more active thyroid glands. Thyroid gland activity was more influenced by the chicks' accumulation of (muscle), than exposure (feces) to naphthalene, C2-naphthalenes, and Ci-fluorenes. Of four major volatile organic contaminants, sulfur dioxide (SO2) primarily influenced thyroid gland activity and structure, supporting previous findings with captive birds. When collectively considering environmental-thyroidal stressors, chicks had a greater thyroidal response when they experienced colder temperatures, accumulated more C2-naphthalenes, and consumed aquatic-emerging insects with higher PAC burdens than terrestrial insects (carbon (delta C-13)). We hypothesize that the more active thyroid glands and higher circulating TT4 of the 051 chicks supported their growth and survival despite having the highest PAC burdens, whereas the lack of thyroid response in the 0S2 chicks combined with high PAC burdens, contributed to their smaller size, poorer condition and poorer survival.
机译：在加拿大阿萨巴斯卡油砂地区（AOSR），与采矿有关的活动附近生长的雏树燕子（Tachycineta bicolor）积累了更高浓度的多环芳族化合物（PAC），这使它们的状况，生长和繁殖成功都更加困难。在这里，我们报告了与参考雏鸟（REF1）相比，在这些与采矿有关的地点（051，OS2），同一个14天大的（do）雏鸟（do <68）的甲状腺功能的变化，以及与多个环境压力因素的关系影响禽甲状腺功能。甲状腺功能受到OS1雏鸟的损害，但通常在OS2和REF1雏鸡之间可比。在2012年，所有雏鸟的循环总三碘甲状腺素（TT3）和甲状腺素（TT4）相似。根据组织学终点，OS1小鸡的甲状腺活性更高。在OS1和OS2小鸡中，肝T4外环脱碘酶（T4-ORD）活性受到抑制。尽管年际差异，但OS1雏鸡在2013年继续经历甲状腺功能受损，循环TT4明显升高，甲状腺活动性增强。OS2雏鸡的甲状腺活性较低，相对于较重的人，这可能是其生长抑制的原因（先前报道）。 OS1雏鸟的甲状腺活跃。雏鸡的（肌肉）积累比起萘，C 2-萘和C 1-芴的暴露（粪便）对甲状腺活性的影响更大。在四种主要的挥发性有机污染物中，二氧化硫（SO2）主要影响甲状腺的活动和结构，支持先前关于圈养鸟类的发现。当集体考虑环境甲状腺应激因素时，雏鸡在经历较冷的温度时会产生更大的甲状腺反应，它们会积累更多的C2-萘，并且消耗的陆生PAC负担的水生昆虫比陆生昆虫（碳（δC-13））高。我们假设，尽管PAC负担最高，但051只鸡的活动性甲状腺和循环TT4较高，仍支持其生长和存活，而0S2鸡的甲状腺反应缺乏，而PAC负担高，这导致它们的体型较小，条件较差，生存较差。

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  • 来源
    《Environmental research》 |2019年第2期|464-475|共12页
  • 作者

    Fernie K. J.; Marteinson S. C.; Chen D.; Palace V.; Peters L.; Soos C.; Smits J. E. G.;

  • 作者单位

    Environm & Climate Change Canada, Ecotoxicol & Wildlife Hlth Div, Sci & Technol Branch, Burlington, ON L7R 1A2, Canada;

    Environm & Climate Change Canada, Ecotoxicol & Wildlife Hlth Div, Sci & Technol Branch, Burlington, ON L7R 1A2, Canada;

    Jinan Univ, Sch Environm, Guangzhou Key Lab Environm Exposure & Hlth, Guangzhou 510632, Guangdong, Peoples R China|Jinan Univ, Guangdong Key Lab Environm Pollut & Hlth, Guangzhou 510632, Guangdong, Peoples R China;

    Int Inst Sustainable Dev, Expt Lakes Area, 111 Lombard Ave,Suite 325, Winnipeg, MB R3B 0T4, Canada;

    Univ Manitoba, Riddell Fac Earth Environm & Resources, 125 Dysart Rd, Winnipeg, MB R3T 2N2, Canada;

    Environm & Climate Change Canada, Ecotoxicol & Wildlife Hlth Div, Sci & Technol Branch, 115 Perimeter Rd, Saskatoon, SK S7N 0X4, Canada;

    Univ Calgary, Fac Vet Med, Dept Ecosyst & Publ Hlth, 3280 Hosp Dr NW, Calgary, AB T2N 4Z6, Canada;

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  • 正文语种 eng
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  • 关键词

    Tree swallows; Bird; Thyroid function; PACs; Air pollution; Multiple stressors; Athabasca Oil Sands Region;

    机译：燕子;鸟类;甲状腺功能;PACs;空气污染;多种应激源;阿萨巴斯卡油砂地区;

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