Environmental Chemistry Laboratory, Department of Toxic Substances Control, California Environmental Protection Agency, Berkeley, CA 94710, USA.
Arch Environ Contam Toxicol. 2011 Apr;60(3):518-23. doi: 10.1007/s00244-010-9546-x. Epub 2010 Jun 1.
Our earlier findings indicate that (1) peregrine falcons (Falco peregrinus anatum Bonaparte) nesting in major California cities have among the highest polybrominated diphenyl ether (PBDE) levels in the world (max ∑PBDEs=100 ppm), and (2) Big City peregrines have higher levels and proportions of the higher-brominated congeners (hepta- to deca-BDEs) than do their Coastal counterparts. In this study we classified the prey species (n =185) from the remains of prey (feathers) at 38 peregrine nest sites over 25 years (1974-1998). We grouped the prey species into 15 categories based on diet and found distinctly different prey patterns for Big City vs. Coastal peregrines. Big City peregrines had a higher (almost three times) weight percentage intake of food waste-eating birds (e.g., rock pigeons, Columba livia) than Coastal peregrines. These differing prey patterns suggest diet as a potential source of the unusually high levels and proportions of higher-brominated PBDEs in Big City peregrines. The relative contributions of diet and dust (e.g., preening) exposure to PBDE patterns in Big City peregrines will be explored in future investigations.
我们早期的研究结果表明，（1）在加利福尼亚主要城市筑巢的游隼（Falco peregrinus anatum Bonaparte）体内的多溴二苯醚（PBDE）含量居世界最高水平之列（最高∑PBDEs=100ppm），（2）与沿海地区的同类相比，大城市的游隼体内的高溴同系物（七溴至十溴代二苯醚）的含量和比例更高。在这项研究中，我们根据 25 年来（1974-1998 年）38 个游隼巢址中剩余猎物（羽毛）的分类，对猎物物种（n=185）进行了分类。我们根据饮食将猎物物种分为 15 类，发现大城市和沿海地区的游隼有着明显不同的猎物模式。大城市的游隼食用垃圾的鸟类（如鸽子、Columba livia）的体重百分比摄入量（几乎是三倍）高于沿海地区的游隼。这些不同的猎物模式表明，饮食可能是大城市游隼体内高浓度和高比例的高溴代 PBDE 的潜在来源。未来的研究将探讨饮食和灰尘（如梳理）暴露对大城市游隼 PBDE 模式的相对贡献。
