Abstract
An ecological study of the moss dwelling testacean fauna (Protozoa, Rhizopoda) on Île de la Possession (Crozet Archipelago, sub-Antarctica) revealed 83 taxa, belonging to 21 genera. The moss flora was dominated by cosmopolitan and ubiquitous taxa, such as Trinema lineare, T. enchelys, Euglypha laevis and E. rotunda. A cluster analysis and a correspondence analysis identified three communities: (1) a Corythion dubium assemblage found in a drier, slightly acidic terrestrial moss vegetation, (2) the Arcella arenaria, and (3) the Difflugiella crenulata assemblages, both characteristic of wetter, circumneutral habitats. The latter typified submerged mosses growing in running water, while the A. arenaria assemblage seemed to prefer mosses in standing waterbodies. Moisture conditions appeared to play a key role in determining the distribution pattern of testacean communities, while pH was only a secondary factor. A logistic regression emphasised the effect of the habitat type in controlling the variance in testacean assemblages. Moreover, the close relationship between bryophyte species and habitat type had a significant influence on the distribution pattern of the testate amoebae. Weighted averaging and calibration were used to estimate moisture optima and tolerances of the testate amoebae.
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Acknowledgements
The sampling was made possible by the logistic and financial support of the French Polar Institute in the frame of the Terrestrial Program 136 (Dr. Yves Frenot and Ir. M. Lebouvier, Université de Rennes, France). Additional funding was provided by the Science Foundation, Flanders (FWO). Prof. Dr. W.H. De Smet is acknowledged for his help during sampling. Bart Van de Vijver is post-doctoral researcher at the FWO, Flanders. Prof. Dr. Stefan Van Dongen is thanked for his help with the logistic regression analysis.
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Appendix
Appendix
List of all observed testate amoebae taxa, including abbreviations used in text and figures. The taxon’s frequency of appearance (%) is also added
ARCARE | Arcella arenaria Greeff | 3.99 |
ARCDIS | Arcella discoides Ehrenberg | 0.01 |
ARCHS1 | Archerella sp1 | 0.08 |
ASSMUS | Assulina muscorum Greeff | 1.06 |
ASSSEM | Assulina seminulum Penard | 0.03 |
ASSSP1 | Assulina sp1 | 0.63 |
CENACT | Centropyxis aculeata Stein | 0.01 |
CENAER | Centropyxis aerophila Deflandre | 1.55 |
CENASP | Centropyxis aerophila vas sphagnicola Deflandre | 0.11 |
CENASY | Centropyxis aerophila vas sylvatica Deflandre | 0.05 |
CENCAS | Centropyxis cassis Deflandre | 0.01 |
CENDEF | Centropyxis deflandriana Bonnet | 0.01 |
CENHIR | Centropyxis hirsuta Deflandre | 0.01 |
CORDUB | Corythion dubium Taranek | 7.89 |
CRYCOM | Cryptodifflugia compressa Penard | 4.08 |
CYCSP1 | Cyclopyxis sp1 | 0.05 |
CYCSP2 | Cyclopyxis sp2 | 0.01 |
CYPSP1 | Cyphoderia sp1 | 0.95 |
DIFAMP | Difflugia ampullula Playfair | 0.01 |
DIFBAC | Difflugia bacillifera Penard | 0.07 |
DIFBRY | Difflugia bryophila Jung | 0.11 |
DIFCLU | Difflugia cfr. lucida | 0.01 |
DIFGLA | Difflugia globulosa Dujardin | 0.08 |
DIFGLO | Difflugia globulus Hopkinson | 0.28 |
DIFLUC | Difflugia lucida Penard | 0.14 |
DIFMIN | Difflugia minutissima Penard | 0.02 |
DIFPRI | Difflugia pristis Penard | 1.31 |
DIFPUL | Difflugia pulex Penard | 0.73 |
DIFSP3 | Difflugia sp3 | 0.10 |
DIFSP4 | Difflugia sp4 | 0.02 |
DIFSP5 | Difflugia sp5 | 0.48 |
DIFSP6 | Difflugia sp6 | 0.01 |
DIFSP7 | Difflugia sp7 | 0.01 |
DIFSP8 | Difflugia sp8 | 1.15 |
DIFSP9 | Difflugia sp9 | 0.09 |
DIFSP10 | Difflugia sp10 | 0.01 |
DIFSP11 | Difflugia sp11 | 0.07 |
DIFTEN | Difflugia tenuis (Penard) Chardez | 0.42 |
DLACRE | Difflugiella crenulata Playfair | 8.79 |
DLACRG | Difflugiella crenulata var. globosa Playfair | 0.04 |
DLAMIN | Difflugiella minuta Playfair | 0.05 |
DLAOVI | Difflugiella oviformis (Penard) Bonnet and Thomas | 1.91 |
DLAOVF | Difflugiella oviformis var. fusca (Penard) Bonnet and Thomas | 0.94 |
DLAPUS | Difflugiella pusilla Playfair | 0.04 |
DLASAC | Difflugiella sacculus (Penard) Deflandre | 0.03 |
DLASP3 | Difflugiella sp3 | 0.03 |
EDACAM | Edaphonobiotus campascoides Schönborn. Foissner and Meisterfeld | 0.18 |
EUGBRY | Euglypha bryophila Brown | 0.01 |
EUGCIL | Euglypha ciliata (Ehrenberg) Perty | 0.35 |
EUGCIG | Euglypha ciliata var. glabra Wailes | 0.30 |
EUGCOM | Euglypha compressa Carter | 0.05 |
EUGCOG | Euglypha compressa var. glabra Cash | 0.03 |
EUGCRI | Euglypha cristata Leidy | 0.38 |
EUGFIL | Euglypha filifera Penard | 0.32 |
EUGLAE | Euglypha laevis Perty | 0.03 |
EUGPOL | Euglypha polylepis Bonnet | 4.78 |
EUGROT | Euglypha rotunda Wailes | 0.59 |
EUGSP1 | Euglypha sp1 | 5.44 |
EUGSP2 | Euglypha sp2 | 0.01 |
EUGSP3 | Euglypha sp3 | 0.12 |
EUGSP4 | Euglypha sp4 | 0.01 |
EUGSTR | Euglypha strigosa Leidy | 0.56 |
EUGTUB | Euglypha tuberculata Dujardin | 0.16 |
EUGTUM | Euglypha tuberculata var. minor Taranek | 0.01 |
HELSYL | Heleopera sylvatica Penard | 0.20 |
HYASP1 | Hyalosphenia sp1 | 0.06 |
HYASP2 | Hyalosphenia sp2 | 0.03 |
HYASP3 | Hyalosphenia sp3 | 0.02 |
HYASP4 | Hyalosphenia sp4 | 0.01 |
MICPAT | Microchlamys patella (Claparede and Lachmann) Cockerell | 1.58 |
NEBDEN | Nebela dentistoma Penard | 0.07 |
NEBTUB | Nebela tubulata Brown | 0.03 |
NEBVAS | Nebela vas Certes | 0.46 |
NEBWAI | Nebela wailesi Deflandre | 0.04 |
PARIRR | Paraquadrula irregularis Deflandre | 0.13 |
PHRPAR | Phryganella paradoxa Penard | 0.02 |
PSEFUL | Pseudodifflugia fulva Penard | 2.07 |
PSEGRA | Pseudodifflugia gracilis Schlumberger | 0.04 |
TRAACO | Tracheleuglypha acolla Bonnet and Thomas | 0.02 |
TRADEN | Tracheleuglypha dentata (Vejdovsky) Deflandre | 1.87 |
TRACOR | Trachelocorythion pulchellum (Penard) Bonnet | 0.96 |
TRIENC | Trinema enchelys Leidy | 11.79 |
TRILIN | Trinema lineare Penard | 29.79 |
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Vincke, S., Gremmen, N., Beyens, L. et al. The moss dwelling testacean fauna of Île de la Possession. Polar Biol 27, 753–766 (2004). https://doi.org/10.1007/s00300-004-0655-8
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DOI: https://doi.org/10.1007/s00300-004-0655-8