Mercury in the Soil-Plant-Deer-Predator Food Chain of a Temperate Forest in Slovenia
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- 作者：Ale
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- 刊名：Environmental Science & Technology
- 出版年：2000
- 出版时间：August 15, 2000
- 年：2000
- 卷：34
- 期：16
- 页码：3337 - 3345
- 全文大小：127K
- 年卷期：v.34,no.16(August 15, 2000)
- ISSN：1520-5851
文摘
Total mercury and methylmercury concentrations fromlong-term monitoring of the terrestrial soil-vegetation-herbivore-carnivore food chain with regard to accumulationand transformation processes were studied in areas ofSlovenia contaminated with mercury to differing degrees,as well as uncontaminated areas. Assessment of theinhaled and ingested contribution of mercury from theenvironment in roe deer (Capreolus capreolus L.), the selectedwild mammal species living in these areas, showed thatwhile the ratio between these two routes of uptake is relativelyconstant, food intake of mercury in roe deer is muchmore important than inhaled mercury, which representsonly up to 0.2% of ingested Hg. Although the plant speciescomprising roe deer foodstuffs were not active accumulatorsof mercury from soil or air, vegetation mediates significanttransfer of Me-Hg to herbivores, and this becomes subjectto further accumulation in the higher trophic levels ofthis food chain. Besides roe deer other bioindicators suchas chamois (Rupicapra rupicapra L.) were selected toconfirm the uptake of mercury from plants. Though theconclusions drawn from the carnivorous predators lynx(Felis lynx L.) and wolves (Canis lupus L.) are limited dueto the limited number of subjects (8 and 2, respectively), theresults and their comparison to other environmental datashowed the transfer of Hg from soil (and air) to vegetation,herbivores and carnivores further up the food chain. Theresults of the measurements as well as concentration factors(CF) and bio-accumulation factors (BAF) show appreciableaccumulation of Me-Hg and less marked accumulationof T-Hg at higher trophic levels of this terrestrial food chain.Interestingly, higher accumulation of Me-Hg was observedin those environments polluted with high concentrationsof inorganic mercury compared to less contaminated andcontrol areas.