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Critical Loads of Lead and Cadmium for Different Type of Forest and Aquatic Ecosystems at the Petrohan LTER Site, Bulgaria

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Title: Critical Loads of Lead and Cadmium for Different Type of Forest and Aquatic Ecosystems at the Petrohan LTER Site, Bulgaria
Authors: Ignatova, Nadka Browse this author
Fikova, Radka Browse this author
Damyanova, Sonya Browse this author
Bratanova-Doncheva, Svetla Browse this author
Keywords: beech
critical loads
stream water
Issue Date: Aug-2012
Publisher: Hokkaido University Forests, EFRC
Journal Title: Eurasian Journal of Forest Research
Volume: 15
Issue: 1
Start Page: 1
End Page: 8
Abstract: The current study was designed to determine the critical loads of lead (Pb) and cadmium (Cd) for two types of vegetation (broadleaves and coniferous) and freshwaters (stream water and reservoir), in order to evaluate the effect of Cd and Pb deposition on investigated ecosystems by comparative simultaneous study at a mountainous LTER site in Bulgaria. Bulk precipitation and throughfall chemistry were monitored during the period 2005-2010 at two forest stands (Fagus sylvatica and Picea abies). Monitoring of water, sediment and bulk precipitation chemistry at two water bodies (stream and reservoir) were carried out too. The removal of Pb and Cd by the biomass and their vertical migration with drainage water was determined. It has been found that the tolerance of surface water to the pollution of Pb has been comparable with forests but aquatic ecosystems are more sensitive to the deposition of Cd due to the low values of critical loads meaning that critical loads for forest can not protect the surface water from the same catchment. Steady state critical loads of Pb and Cd for forests based on human health approach have remained stable and have not been exceeded during the study period. Real risk of harmful effect in the future has been discovered for surface waters because of higher input of Cd than critical loads obtained by ecotoxicological approach.
Type: bulletin (article)
Appears in Collections:Eurasian journal of forest research > Vol.15-1

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