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Dynamics of mercury and methylmercury in forest floor and runoff of a forested watershed in Central Europe

Titelangaben

Schwesig, David ; Matzner, Egbert:
Dynamics of mercury and methylmercury in forest floor and runoff of a forested watershed in Central Europe.
In: Biogeochemistry. Bd. 53 (2001) Heft 2 . - S. 181-200.
ISSN 1573-515X
DOI: https://doi.org/10.1023/A:1010600600099

Abstract

Forested watersheds are an important part of the terrestrial mercury and methylmercury cycle, and a link between the atmospheric and aquatic environment. This study was conducted to determine the contribution of the forest floor to the pools and fluxes of total Hg (Hgtotal) and methylmercury (MeHg) in a forested catchment, and to identify factors influencing the mobility of both compounds. Throughfall deposition, litterfall, runoff and fluxes with forest floor percolate of Hgtotal and MeHg were sampled during one year in a coniferous catchment in Germany. Total deposition of Hgtotal was 450 mg ha-1 a-1 with litterfall contributing one third. Nearly 74% of the total input of Hgtotal reached the mineral soil with the forest floor percolate, but less than half of this fraction was found in the runoff of the catchment. Total deposition of MeHg was 2.6 mg ha-1 a-1, with litterfall as the dominating pathway. Only 18% of the MeHg deposition was discharged from the forest floor, but the flux of MeHg with runoff was nearly twice as high. Only few correlations with other solution parameters were found. Fluxes of both compounds with forest floor percolates depended mainly on water fluxes, which was not true for the runoff. The forest floor of the upland soil is an effective sink for MeHg, but not for Hgtotal. Differences in the mobility of both compounds in the forest floor disappeared at the catchment scale, probably because other processes (i.e. Hgtotal immobilization and MeHg formation) dominated.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER7469
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Bodenökologie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Ehemalige Professoren > Lehrstuhl Bodenökologie - Univ.-Prof. Dr. Egbert Matzner
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 13 Aug 2015 06:12
Letzte Änderung: 13 Aug 2015 06:12
URI: https://eref.uni-bayreuth.de/id/eprint/18046