alexa Testate amoebae in 31 mature forest ecosystems--densities and micro-distribution in soils.
Environmental Sciences

Environmental Sciences

Journal of Bioremediation & Biodegradation

Author(s): Ehrmann O, Puppe D, Wanner M, Kaczorek D, Sommer M

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Abstract We studied testate amoebae and possible correlated abiotic factors in soils of 31 mature forest ecosystems using an easily applicable and spatially explicit method. Simple counting on soil thin-sections with a light microscope resulted in amoeba densities comparable to previously reported values, i.e. 0.1 × 10(8) to 11.5 × 10(8) individuals m(-2) (upper 3 cm of soil). Soil moisture and soil acidity seem to be correlated with amoeba densities. At sites of moderate soil moisture regimes (SMR 2-7) we found higher densities of testate amoebae at pH<4.5. At wetter sites (SMR ≥ 8) higher individual densities were recorded also at less acidic sites. The in situ description of amoebae, based on the analysis of a complete soil thin-section, showed a relatively uniform spatial micro-distribution throughout the organic and mineral soil horizons (no testate amoeba clusters). We discuss the pros and cons of the soil thin-section method and suggest it as an additional tool to improve knowledge of the spatial micro-distribution of testate amoebae. Copyright © 2012 Elsevier GmbH. All rights reserved. This article was published in Eur J Protistol and referenced in Journal of Bioremediation & Biodegradation

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