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Soil Ecological Impact of a Hotspot Copper Contamination

Fründ, Heinz-Christian (2008) Soil Ecological Impact of a Hotspot Copper Contamination. In: Tagung: Bodenbiologische Indikatoren für eine nachhaltige Bodennutzung, 28.-29. Februar 2008, Osnabrück.

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In the experimental farm of the Fachhochschule Osnabrück an area (15 m x 20 m) of eutric cambisol over limestone is covered with a 0.3 m layer of very humous sandy substrate with an extremely high copper contamination (> 20 000 mg/kg). In the field the extremely contaminated place was well vegetated but recognisable by its spontaneous vegetation (high dominance of Urtica dioica) and a mor / moder like humus form with plant residues and a dense root mat of nettles overlaying the mineral soil. Soil microbial parameters (field respiration, basal respiration, microbial biomass) and decomposition of plant residues in litter bags differed not significantly between the hot spot and an adjacent reference plot with low Cu contamination. Toxicity tests confirmed that the soil contamination is very adverse to earthworms, is depressing plant growth (Lepidum sativum), and is inhibiting substrate induced respiration. It is concluded that the contamination disrupted the soil ecological system. A decomposer refuge and shortcut nutrient cycle developed in the litter layer on top of the contamination. Bioturbation is the most affected soil biological process, therefore the spread of the contaminated substrate into the surrounding soil is minimized. Trees are probably able to circumvent the contaminated zone with their root system.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Ökotoxikologie, Kupfer, Humusform, Zersetzerrefugium, Ecotoxicology, copper, humus form, decomposer refuge
Divisions: Kommissionen > Kommission III: Bodenbiologie und Bodenökologie
Depositing User: Unnamed user with email dbg@dbges.de
Date Deposited: 27 Mar 2009 16:35
Last Modified: 13 Dec 2015 16:22
URI: https://eprints.dbges.de/id/eprint/33

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