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首页> 外文期刊>The wilson journal of ornithology >ENVIRONMENTAL CONTAMINANTS IN EXCREMENT OF IOWA'S NESTING AND WINTERING BALD EAGLES (HALIAEETUS LEUCOCEPHALUS)
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ENVIRONMENTAL CONTAMINANTS IN EXCREMENT OF IOWA'S NESTING AND WINTERING BALD EAGLES (HALIAEETUS LEUCOCEPHALUS)

机译：清除爱荷华州嵌套和冬季秃鹰（HALIAEETUS LEUCOCEPHALUS）的环境污染物

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摘要

Bald Eagles (Haliaeetus leucocephalus) were rare only a few decades ago but have undergone a spectacular recovery range-wide. While their numbers have increased, there is concern about exposure of Bald Eagles to environmental contaminants. We collected excrement from nesting and wintering Bald Eagles in Iowa to examine their exposure to several contaminants and tested for differences as a function of space, time, and breeding status. We detected aluminum, copper, manganese, and zinc at levels above the quantitation limit (QL) in most excrement samples. These elements are all essential micronutrients normally found in living organisms. Arsenic and selenium are essential micronutrients for which fewer samples had levels above the QL. We also detected non-essential elements barium, cadmium, lead, and mercury in excrement samples, although only one sample had a cadmium level above the QL and only 26% of samples had lead levels above the QL. Geometric mean contaminant levels in excrement samples collected from nesting eagles during the spring were higher than for samples collected in the winter for aluminum, barium, copper, manganese, and zinc. The only difference we detected in contaminant levels in excrement samples was in manganese (higher for nest sites along the Mississippi River) and selenium (lower for nest sites along the Mississippi River) versus nest sites not associated with the Mississippi River. We also found that non-breeding eagles had higher levels of barium and manganese than nesting eagles. Our results can serve as a baseline for comparison with future studies investigating exposure of Bald Eagles to environmental contaminants.
机译：秃头鹰（Haliaeetus leucocephalus）仅在几十年前很罕见，但在整个范围内都经历了惊人的恢复。尽管它们的数量增加了，但人们担心秃头鹰会暴露于环境污染物中。我们从爱荷华州的巢穴和越冬的秃头鹰收集了粪便，以检查它们对几种污染物的暴露程度，并根据空间，时间和繁殖状态对它们的差异进行测试。在大多数粪便样本中，我们检测到的铝，铜，锰和锌的含量均超过了定量限（QL）。这些元素都是通常在活生物体中发现的所有必需微量营养素。砷和硒是必需的微量营养素，其水平高于QL的样品较少。我们还检测了粪便样品中的非必需元素钡，镉，铅和汞，尽管只有一个样品的镉含量高于QL，只有26％的样品铅含量高于QL。春季从巢鹰采集的粪便样品中的几何平均污染物水平高于冬季从铝，钡，铜，锰和锌中采集的样品中的几何平均污染物水平。我们检测到的粪便中污染物含量的唯一差异是锰（密西西比河沿岸的巢穴较高）和硒（密西西比河沿岸的巢穴较低）与不与密西西比河相关的巢穴。我们还发现，与巢鹰相比，非繁殖鹰的钡和锰含量更高。我们的结果可作为与未来研究秃头鹰暴露于环境污染物的研究进行比较的基准。

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