Titlebook: Mercury in the Biogeochemical Cycle; Natural Environments Marc Lucotte,Roger Schetagne,Alain Tremblay Book 1999 Springer-Verlag Berlin Heid

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Release of Mercury and Methylmercury from Flooded Organic MatterAlder and spruce were within the range of 1–2 ng g.. Globally, there were no clear effects of temperature, pH and levels of dissolved oxygen on releases of total Hg or MeHg, although for individual substrates there were some differences. For the humus samples, feather moss (. sp.) humus yielded grea

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Mercury Dynamics at the Flooded Soil-Water Interface in Reservoirs of Northern Québec: in Situ Obserethylation can be clearly observed during winter periods or from one year to the next over the first 13 years of flooding. Low concentrations of dissolved methylmercury (MeHg) (in the few tenths of ng L. range) in the reservoirs are indicative of the important dilution of the fraction of this compou

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Bioaccumulation of Methylmercury in Invertebrates from Boreal Hydroelectric Reservoirshe benthic food chain. The biomagnification factors are independent of the type of environment (natural lake or reservoir). The results also suggest, in reservoirs, that SPM eroded from flooded soils by wave and ice action, and the biofilm at the soil-water interface may constitute the active route

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Post-Impoundment Evolution of Fish Mercury Levels at the La Grande Complex, Québec, Canada (from 197 to 25 years for non-piscivorous species, and after 20 to 30 years for piscivorous ones. This duration of the phenomenon is corroborated by results from other reservoirs in Canada and Finland. Monitoring of Hg levels in fish and studies of drifting organisms also show that Hg is exported downstream

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Calculated Fluxes of Mercury to Fish in the Robert-Bourassa Reservoirtocks, the “available” biomass and Hg fluxes from the prey fish to the piscivorous fish were also calculated. Conversely, from field data and the calculated standing stocks for both groups of fish, fluxes “required” to explain the fish biomass and Hg concentration of fish, were also computed. The ma

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Breeding Success of Osprey under High Seasonal Methylmercury Exposurein summer. Future research on methylmercury (MeHg) exposure through fish consumption and on post-fledging risks related to high Hg exposure during the preceding fall migration must address the physiological mechanisms, such as demethylation by internal organs, that allow piscivorous birds to regulat

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Book 1999y mis­ informed manner, pressure groups tend to support the researcher whose opinions most closely represent either their particular ideological battles or their economic interests and, hence, in their own way, add further to the confusion and obscurity of the debate. Only a few years ago, mercury (

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Normand Thérien,Ken Morrisonn neuen Schrifttums, welches über 350 Arbeiten umfaßt. - Einen wesentlichen Raum beanspruchen auch die sehr zahlreichen Fundortsangaben, durch welche die Kenntnis des Ver­ breitungsgebietes vieler Arten oft wesentlich erweitert wird. Hervorhebens­ wert ist die Auffindung von drei in Österreich boden