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Xylem sap as a pathway for total mercury and methylmercury transport from soils to tree canopy in the boreal forest Inra
Bishop, K.H.; Lee, Y.H.; Munthe, J.; Dambrine, E..
Conifer needles are an important link in the cycling of Total Mercury (THg) and Methylmercury (MeHg) in the boreal ecosystem due to the high THg andMeHg concentrations in litterfall.Translocationwithin the tree ofHg fromsoils to the crowncanopy has been assumed to be a minor source of the Hg in litterfall. This paper, however, is the first to present direct observations of THg/MeHg transport from the soil via xylem sap. Xylem sap concentrations of THg and MeHg were measured in sap drained from different levels along the boles of freshly cut 100 year old Norway spruce (Picea abies) and Scots pine (Pinus sylvestris). The treescame from a mixed stand growing on podzolized till soils at the Svartberget Forest Research Station in N. Sweden. Soil solution...
Tipo: Journal Article Palavras-chave: FORET BOREALE; MERCURE; METHYLMERCURE; FEUILLE; SOL; TRANSPORT SOL PLANTE; XYLEME; LITIERE FORESTIERE; POLLUANT; METAL LOURD NORWAY SPRUCE; LITTER ; DEPOSITION; EMISSION; ENVIRONMENT; PLANTS; VAPOR; AIR; HG; ATMOSPHERIC DEPOSITION; LITTERFALL; MERCURY; METHYLMERCURY; XYLEM SAP .
Ano: 1998 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2010da7bd4d&uri=/notices/prodinra1/2010/10/
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