Mitchell EAD, Charman DJ, Warner BG (2008) Testate amoebae analysis in ecological and paleoecological studies of wetlands: past, present and future. Bulletin de l’lnstitut Agronomique et des Stations de Recherche de Gembloux 33:307–341 The optima did not vary for species inhabiting only ombrotrophic or only minerotrophic mires.Ĭhardez D (1965) Ecologie generale des Thecamoebiens. Variation of the optimum was observed in those species that inhabited both ombrotrophic and minerotrophic mires due to the fact that mires with a different trophic status were included in the training sets.

In extreme conditions, the species were more sensitive to the trophic status than to the water table depth, and their optimum related to water table depth was distorted.

For all species, the trophic state of the mires affected the values of the species optima related to water table depth, as revealed in the form of a threshold effect. Some of these species preferred minerotrophic conditions, while others preferred ombrotrophic ones. For 36 testate amoeba species, which were found in the ombrotrophic and minerotrophic mire habitats, their species optima, obtained separately in ombrotrophic and minerotrophic datasets, differed significantly from each other. However, the trophic state (specifically pH and ash content) was more important factor in the combined dataset, including all of the studied mires. In the datasets obtained separately from ombrotrophic and minerotrophic mires, the water table depth was the main factor affecting testate amoeba assemblages. To estimate the influence of the trophic state of mires on species optima related to water table depth, a separate study of three calibration datasets including ombrotrophic, minerotrophic and the combined habitats was conducted.

This study focusses on the ecology of testate amoeba species in peatlands of the southern taiga of Western Siberia.

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