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Fluxes of inorganic and organic arsenic species in a Norway spruce forest floor

Title data

Huang, Jen-How ; Matzner, Egbert:
Fluxes of inorganic and organic arsenic species in a Norway spruce forest floor.
In: Environmental Pollution. Vol. 149 (2007) Issue 2 . - pp. 201-208.
ISSN 1873-6424
DOI: https://doi.org/10.1016/j.envpol.2007.01.004

Abstract in another language

To identify the role of the forest floor in arsenic (As) biogeochemistry, concentrations and fluxes of inorganic and organic As in throughfall, litterfall and forest floor percolates at different layers were investigated. Nearly 40% of total Astotal input (5.3 g As ha−1 yr−1) was retained in Oi layer, whereas Astotal fluxes from Oe and Oa layers exceeded the input by far (10.8 and 20 g As ha−1 yr−1, respectively). Except dimethylarsinic acid (DMA), fluxes of organic As decreased with depth of forest floor so that <10% of total deposition (all <0.3 g As ha−1 yr−1) reached the mineral soil. All forest floor layers are sinks for most organic As. Conversely, Oe and Oa layers are sources of Astotal, arsenite, arsenate and DMA. Significant correlations (r ≥ 0.43) between fluxes of Astotal, arsenite, arsenate or DMA and water indicate hydrological conditions and adsorption–desorption as factors influencing their release from the forest floor. The higher net release of arsenite from Oe and Oa and of DMA from Oa layer in the growing than dormant season also suggests microbial influences on the release of arsenite and DMA.The forest floor layers are generally a source for inorganic arsenic species but a sink for most organic arsenic species under the present deposition rate.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER40088
Keywords: Arsenic speciation; Throughfall; Litterfall; Forest floor percolate
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Chair Soil Ecology
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Chair Soil Ecology - Univ.-Prof. Dr. Egbert Matzner
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences
Research Institutions
Research Institutions > Research Centres
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 11 Sep 2015 06:33
Last Modified: 16 Jan 2018 12:35
URI: https://eref.uni-bayreuth.de/id/eprint/19135