Kim J, Koo T-H
Center for Environmental Studies, Kyung Hee University, 449-701, Yongin, Gyeonggi-do, Republic of Korea.
Arch Environ Contam Toxicol. 2007 Oct;53(3):435-41. doi: 10.1007/s00244-006-0196-y. Epub 2007 Jul 20.
This study measured concentrations of iron, manganese, zinc, copper, lead, and cadmium in environmental substrates (water and sediment) as well as in the diet and feathers of Black-crowned Night Heron Nycticorax nycticorax and Grey Heron Ardea cinerea chicks from Pyeongtaek heronry, Gyeonggi-do, Korea. Zinc and cadmium concentrations in sediment were relatively high, but lead was low. In the diet, only copper concentrations were higher in Black-crowned Night Herons than in Grey Herons. Cadmium concentrations in the diet of two heron species from a Pyeongtaek heron colony were also higher than reported in other studies. In feathers, iron, copper, and lead concentrations were significantly different between heron species. Iron and copper concentrations were higher in Black-crowned Night Heron chicks than in Grey Heron chicks, but lead concentrations were not. Therefore, with the exception of lead, heavy metal concentrations in feathers were not related to concentrations in the diet. Zinc, iron, and lead concentrations in heron feathers were within the ranges reported by other heron studies, but manganese, copper, and cadmium were much higher. Lead and cadmium concentrations in feathers of Black-crowned Night Heron and Grey Heron chicks were elevated to lead and cadmium concentrations in the diet. Therefore, we suggest that lead and cadmium concentrations in heron feathers reflect contamination of breeding sites and are useful bioindicators of local contamination.
本研究测量了韩国京畿道平泽鹭巢中黑冠夜鹭（Nycticorax nycticorax）和苍鹭（Ardea cinerea）雏鸟的环境基质（水和沉积物）、食物及羽毛中铁、锰、锌、铜、铅和镉的浓度。沉积物中的锌和镉浓度相对较高，但铅含量较低。在食物中，只有黑冠夜鹭的铜浓度高于苍鹭。来自平泽鹭群的两种鹭类食物中的镉浓度也高于其他研究报告的水平。在羽毛中, 鹭类之间的铁、铜和铅浓度存在显著差异。黑冠夜鹭雏鸟的铁和铜浓度高于苍鹭雏鸟，但铅浓度并非如此。因此，除铅外，羽毛中的重金属浓度与食物中的浓度无关。鹭类羽毛中的锌、铁和铅浓度在其他鹭类研究报告的范围内，但锰、铜和镉的浓度要高得多。黑冠夜鹭和苍鹭雏鸟羽毛中的铅和镉浓度升高至食物中的铅和镉浓度。因此，我们认为鹭类羽毛中的铅和镉浓度反映了繁殖地的污染情况，是当地污染的有用生物指标。
