受有色金属密集采矿影响的中国南方某地区鸟类羽毛中重金属、砷和硒的含量

重金属污染在中国非常普遍，特别是在其矿区。最近有报道称贵州省鸟类体内的汞浓度高于有害影响水平，即使是在非矿区也同样如此。我们采集了鸟类样本以调查在广西壮族自治区汞是否是铅矿、锌矿和锡矿附近的潜在威胁因素。我们测定了由60个物种组成的627只本地鸟类羽毛中的8种金属或类金属，这些样本采集于在5条河流的14个位点。。我们发现汞浓度（1.27±2.02ppm）低于最近的贵州研究中报道的浓度。汞与其他金属或类金属的相关性最低，而与开采金属（铅、锡、锌）的相关性最高。镉（1.12±2.64 ppm）、砷（4.78±17.11 ppm）和铅（17.18±24.49 ppm）的浓度水平接近有害效应阈值，或与其他研究相比相对较高。除了汞、镉和砷的几个热点矿区外，金属或类金属水平在矿区之间分布均匀，与可开采矿床的区域分布一致。汞尽管可能危害汞矿附近的一些物种，但似乎并没有威胁到中国所有的鸟类物种。然而，除了汞之外，其他金属或类金属也可能对野生生物的健康造成危害。

Heavy Metal, Arsenic and Selenium Concentrations in Bird Feathers from a Region in Southern China Impacted by Intensive Mining of Non-ferrous Metals.

Heavy metal pollution is widespread in China, particularly in its mining regions. Mercury Hg] concentrations in birds from Guizhou Province were recently reported to be above adverse effect levels, even in non-mining areas. We sampled birds to investigate whether Hg might be a threat near lead Pb], zinc Zn] and tin Sn] mines in Guangxi Zhuang Autonomous Region. We measured concentrations of eight metals/metalloids in feathers of 627 resident birds representing 60 species sampled across 14 sites on five rivers. We found Hg concentrations (mean ± SD, 1.27 ± 2.02 ppm) were lower than in the recent Guizhou study. Mercury had the fewest correlations with other metals/metalloids; the mined metals (Pb, Sn, Zn) had the most such correlations. Levels of cadmium (Cd, 1.12 ± 2.64 ppm), As (4.78 ± 17.11 ppm), and Pb (17.18 ± 24.49 ppm) were closer to thresholds of adverse effects, or relatively high compared to other studies. With the exception of a few hotspots for Hg, Cd, and As near mines, metal/metalloid levels were fairly evenly distributed among sites, consistent with the regional occurrence of mineable ore deposits. Hg appears not to be threatening to all avian species in China, although it may be problematic for some species near Hg mines. In addition to Hg, however, other metals/metalloids may pose wildlife health hazards.