Abstract：
Concentrations of one metalloid (As) and eight metals (Cd, Cr, Cu, Hg, Mn, Ni, Pb, and Zn) were determined in tissues (muscle, liver, and kidney) of eight snake species (Bothrops neuwiedi, Crotalus durissus, Dipsas mikanii, Epicrates crassus, Helicops modestus, Micrurus carvalhoi, Oxyrhopus guibei, and Oxyrhopus trigeminus) from Lagoa Santa Karst. Except for Cu and Zn, all other analyzed elements were detected in concentrations within the ranges previously reported for snakes inhabiting polluted areas, emphasizing Hg (specific Hg mean concentrations varied from 0.87 to 9.76 μg g-1 d.w). The highest mean concentrations of all elements except Zn were found in muscle samples of the false corals O. guibei (means ranged from 2.01 [Pb] to 9.76 [Hg]). The highest Zn mean concentration (13.77 μg g-1 d.w) was detected in the kidney of the water snake H. modestus. No significant correlation was found between element concentrations and body size for all species. Significant interorgan differences were observed for As, Cr, Cu, Hg, Mn, Pb, and Zn concentrations in the three tissues in H. modestus. Significant interspecific differences were found in at least one organ for all elements. Significant pairwise differences were found between diet specialist species and between these species and broader diet species, while no significant difference was found between the broader diet species. The bioaccumulation of As and metals in snakes from Lagoa Santa Karst could be associated with natural rock dissolution and erosion processes but also with the wide-scale mining in the region and the increased agriculture and urbanization.
摘要：
一种准金属(As)和八种金属(Cd，Cr,Cu,Hg,Mn,Ni,Pb,和锌)在组织(肌肉，肝脏,和肾脏）八种蛇（Bothropsneuwiedi，Crotalusdurissus,Dipsasmikanii，Epicratescrassus,Helicopsmodestus,Micruruscarvalhoi,桂贝，和LagoaSantaKarst的OxyrhopusTriginus）。除Cu和Zn外,所有其他分析元素的浓度都在先前报告的居住在污染地区的蛇的范围内检测到，强调汞(具体汞平均浓度从0.87到9.76μgg-1d.w)。在假珊瑚O.guibei的肌肉样品中发现了除Zn以外的所有元素的最高平均浓度（平均值范围为2.01[Pb]至9.76[Hg]）。在水蛇H.modestus的肾脏中检测到最高的Zn平均浓度（13.77μgg-1d.w）。所有物种的元素浓度与体型之间均未发现显着相关性。观察到As的明显器官间差异，Cr,Cu,Hg,Mn,Pb,和H.modestus中三种组织中的锌浓度。在所有元素的至少一个器官中发现了显着的种间差异。在饮食专家物种之间以及这些物种与更广泛的饮食物种之间发现了显着的成对差异，而在更广泛的饮食物种之间没有发现显着差异。来自LagoaSanta喀斯特的蛇中砷和金属的生物积累可能与天然岩石溶解和侵蚀过程有关，也与该地区的大规模采矿以及农业和城市化的增加有关。
