2020年6月3日
Land Use in Habitat Affects Metal Concentrations in Wild Lizards Around a Former Lead Mining Site.
Environmental science & technology
- 巻
- 54
- 号
- 22
- 開始ページ
- 14474
- 終了ページ
- 14481
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/acs.est.0c00150
We investigated the potential effects of different land use and other environment factors on animals living in a contaminated environment. The study site in Kabwe, Zambia, is currently undergoing urban expansion, while lead contamination from former mining activities is still prevalent. We focused on a habitat-generalist lizards (Trachylepis wahlbergii). The livers, lungs, blood and stomach contents of 224 lizards were analyzed for their lead, zinc, cadmium, copper, nickel and arsenic concentrations. Habitat types were categorized based on vegetation data obtained from satellite images. Multiple regression analysis revealed that land use categories of habitats and three other factors significantly affected lead concentrations in the lizards. Further investigation suggested that the lead concentrations in lizards living in bare fields were higher than expected based on distance from the contaminant source, while those in lizards living in green fields were lower than expected. In addition, lead concentration of lungs were higher than that of liver in 19% of the lizards, implying direct exposure to lead via dust inhalation besides digestive exposure. Since vegetation reduces the production of dust from surface soil, it is plausible that dust from the mine is one of the contamination sources, and that vegetation can reduce exposure to this.
- ID情報
-
- DOI : 10.1021/acs.est.0c00150
- PubMed ID : 32490671