Responses of wild small mammals to a pollution gradient: Host factors influence metal and metallothionein levels
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- 作者：Clé ; mentine Fritsch ; Richard P. Cosson ; Michaë ; l Cœ ; urdassier ; Francis Raoul ; Patrick Giraudoux ; Nadia Crini ; Annette de Vaufleury ; Renaud Scheifler
- 关键词：Bioavailability ; Bioaccumulation ; Metallic trace elements ; Sequestration ; Smelter
- 刊名：Environmental Pollution
- 出版年：2010
- 出版时间：March 2010
- 年：2010
- 卷：158
- 期：3
- 页码：827-840
- 全文大小：932 K
文摘
We investigated how host factors (species, age, gender) modulated Cd, Pb, Zn, and Cu concentrations, metallothionein levels (MTs) and their relationships in 7 sympatric small mammal species along a pollution gradient. Cd concentrations in liver and kidneys increased with age in all species. Age effect on other metals and MTs differs among species. Gender did not influence metal and MT levels except in the bank vole. Three patterns linking internal metal concentrations and MTs were observed along the gradient: a low metal accumulation with a (i) high (wood mouse) or (ii) low (bank vole) level of MTs accompanied by a slight or no increase of MTs with Cd accumulation; (iii) an elevated metal accumulation with a sharp increase of MTs (common and pygmy shrews). In risk assessment and biomonitoring perspectives, we conclude that measurements of MTs and metals might be associated because they cannot be interpreted properly when considered separately.