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首页> 外文期刊>Environmental toxicology and chemistry >Geckos as indicators of mining pollution.
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Geckos as indicators of mining pollution.

机译：壁虎是采矿污染的指标。

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Catastrophic collapse of a mine tailings dam released several million cubic meters of toxic mud and acidic water into the Guadiamar River valley, southern Spain, in 1998. Remediation efforts removed most of the sludge from the floodplain, but contamination persists. Clean-up activities also produced clouds of aerosolized materials that further contaminated the surrounding landscape. Whole-body concentrations of 21 elements in the Moorish wall gecko, Tarentola mauritanica, a common inhabitant of both rural and urban areas, were compared among seven locations. Locations spanned an expected contamination gradient and included a rural and an urban non-mine-affected location, two mine-affected towns, and three locations on the contaminated floodplain. Multivariate analyses of whole-body concentrations identified pollutants that increased across the expected contamination gradient, a trend particularly evident for As, Pb, and Cd. Additionally, higher contaminant concentrations occurred in prey items eaten bygeckos from mine-affected areas. Comparison of element concentrations in tails and whole bodies suggests that tail clips are a viable nondestructive index of contaminant accumulation. Our results indicate that areas polluted by the mine continue to experience contamination of the terrestrial food chain. Where abundant, geckos represent useful taxa to study the bioavailability of some hazardous pollutants.
机译：1998年，矿山尾矿坝的灾难性倒塌向西班牙南部的瓜迪亚马尔河谷释放了数百万立方米的有毒泥浆和酸性水。整治工作从洪泛区清除了大部分污泥，但污染仍然存在。清理活动还产生了雾化的雾状物质，进一步污染了周围的景观。在七个地区中，比较了摩尔壁壁虎，塔伦托拉毛里塔尼察（塔伦托拉毛里塔尼察）（农村和城市地区的常见居民）中21种元素的全身浓度。这些地点的分布范围超出了预期的污染梯度，其中包括农村和城市不受地雷影响的地点，两个受地雷影响的城镇以及受污染的洪泛区上的三个地点。全身浓度的多变量分析确定了污染物在预期污染梯度范围内的增加，这一趋势在砷，铅和镉中尤为明显。此外，受地雷影响地区的壁虎吃掉的猎物中的污染物浓度更高。比较尾巴和全身中元素的浓度，表明尾夹是可行的污染物积累的非破坏性指标。我们的结果表明，受地雷污染的地区继续受到陆地食物链的污染。在壁虎数量丰富的地方，它们是研究某些有害污染物的生物利用度的有用分类单元。

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