Université de Neuchâtel

Vertical Micro-Distribution and Response to Nitrogen Deposition of Testate Amoebae in Sphagnum

Gilbert, Daniel ; Mitchell, Edward A. D.

In: Journal of Eukaryotic Microbiology, 2005, vol. 51, no. 4, p. 480-490

Previous studies have shown the existence of a vertical micro-distribution of testate amoebae in the first centimeters of Sphagnum and their response to nutrient enrichment. In order to test the response of testate amoebae to depth and N addition in dry moss carpets recolonizing cutover peatlands, we sampled Sphagnum that had received 0, 1, 3, or 10g N m−2...

Université de Neuchâtel

Testate Amoebae (Protista) Communities in Hylocomium splendens (Hedw.) B.S.G. (Bryophyta): Relationships with Altitude, and Moss Elemental Chemistry

Mitchell, Edward A. D. ; Bragazza, Luca ; Gerdol, Renato

In: Protist, 2004, vol. 155, no. 4, p. 423-436

We studied the testate amoebae in the moss Hylocomium splendens along an altitudinal gradient from 1000 to 2200 m asl. in the south-eastern Alps of Italy in relation to micro- and macro-nutrient content of moss plants. Three mountainous areas were chosen, two of them characterised by calcareous bedrock, the third by siliceous bedrock. A total of 25 testate amoebae taxa were recorded, with...

Université de Neuchâtel

Changes in Testate Amoebae (Protists) Communities in a Small Raised Bog. A 40-year Study

Kishaba, Keiko ; Mitchell, Edward A. D.

In: Acta protozoologica, 2005, vol. 44, p. 1-12

We analysed the testate amoebae communities from two sets of moss samples taken forty years apart (1961 and 2001) in the same locations of a peat bog of the Swiss Jura Mountains. Peat cutting and lateral drainage of Le Cachot bog have caused a clear increase in tree cover, especially near the edges. Changes affecting herbaceous plants, mosses, or soil organisms can be subtle, and may easily be...