Dipartimento di Biologia Cellulare e Ambientale, Università degli Studi di Perugia, Via Elce Di Sotto, 06123 Perugia, Italy.
Chemosphere. 2010 Mar;79(1):33-9. doi: 10.1016/j.chemosphere.2010.01.057. Epub 2010 Feb 20.
The chemical analysis of the bottom sediments of the Lake Piediluco (Central Italy) has been carried out in order to individuate the potential correlation between the sediment toxicity and the high incidence of mouthpart deformities in chironomid larvae (biological indicators) found in this lake. The environmental contamination has been analyzed by determining the concentrations of the main heavy metals (lead, copper, cadmium, chromium, zinc and nickel), and the concentrations of organic compounds of anthropic source: PAHs, NPPs and OCPs. Heavy metals concentrations have pointed out a non-elevated contamination grade for the Lake Piediluco. The highest level of metals has been detected in the western area that feels the effect of the continuous tributaries incoming load. Also, concerning PAHs, NPPs and OCPs the lake does not present high values of pollution. The highest concentrations of the organic toxicants has been observed in the eastern sector of the lake, which presents typical lentic characteristics. A clear relationship has not found between the toxic substances present in the lacustrine sediments and the deformities incidence for chironomid larvae, which represent an index of environmental alteration. Probably, the mouthpart deformities found in the chironomid larvae of Chironomus plumosus are affected by a synergic action due to the whole toxic mixture present in the sediments of the Lake Piediluco.
为了确定湖泊底泥的毒性与在该湖泊中发现的摇蚊幼虫（生物指标）的高畸形发生率之间是否存在潜在关联，对意大利中部皮埃迪卢科湖的底泥进行了化学分析。通过测定主要重金属（铅、铜、镉、铬、锌和镍）以及人为来源的有机化合物（多环芳烃、壬基酚和有机氯农药）的浓度，分析了环境污染情况。重金属浓度表明皮埃迪卢科湖的污染程度并不高。在受众多支流来水影响的西部区域，检测到的金属含量最高。此外，就多环芳烃、壬基酚和有机氯农药而言，该湖的污染水平并不高。在湖泊东部区域，发现了有机有毒物质的最高浓度，该区域具有典型的静水特征。在湖泊底泥中存在的有毒物质与摇蚊幼虫畸形发生率之间没有发现明显的关系，因为摇蚊幼虫是环境变化的一个指标。可能是由于皮埃迪卢科湖底泥中存在的有毒混合物的协同作用，导致在粗壮摇蚊幼虫中发现的口器畸形。
