Antarctic Science



Soil testate amoebae from sub-Antarctic Îles Crozet


SOFIE VINCKE a1c1, PIETER LEDEGANCK a1, LOUIS BEYENS a1 and BART VAN DE VIJVER a1
a1 University of Antwerp (campus Middelheim), Department of Biology, Unit of Polar Ecology, Limnology & Paleobiology, Groenenborgerlaan 171, B-2020 Antwerp, Belgium

Article author query
vincke s   [PubMed][Google Scholar] 
ledeganck p   [PubMed][Google Scholar] 
beyens l   [PubMed][Google Scholar] 
van de vijver b   [PubMed][Google Scholar] 

Abstract

An ecological study of the soil testate amoebae (Protozoa, Rhizopoda) communities on the sub-Antarctic island of Île de la Possession (Îles Crozet) revealed 65 taxa, belonging to 20 genera. Trinema lineare and Euglypha laevis were the most dominant species in all types of soils on the island. A Redundancy Analysis revealed three communities that characterize specific habitats: i. fellfield soils, characterized by low moisture values and low organic material content, contained fewer taxa and fewer individuals, ii. peaty valley soils, with lower pH values, showed high abundances and diversity, and iii. soils influenced by sea spray and marine animals had higher nutrient contents, elevated chloride and conductance values, resulting in more tests of Difflugiella oviformis, Nebela dentistoma and Edaphonobiotus campascoides. Special attention was given to the species composition in relation to the soil type and its moisture content. A comparison with aquatic habitats on Île de la Possession was made.

(Received October 8 2003)
(Accepted January 26 2004)


Key Words: bio-diversity; community analysis; ecology; Île de la Possession; moisture; Rhizopoda.

Correspondence:
c1 sofie.vincke@ua.ac.be


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