Testate amoeba analysis of lake sediments: impact of filter size and total count on estimates of density, species richness and assemblage structure
| Autor: | Adeline A. J. Wall, Daniel Gilbert, Michel Magny, Edward A. D. Mitchell |
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| Přispěvatelé: | Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Wetlands Research Group, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, Swiss Federal Research Institute WSL-AR, Ecole Polytechnique Fédérale de Lausanne (EPFL), Institute of Biology - Laboratory of Soil Biology, Université de Neuchâtel (UNINE), Laboratoire Chrono-environnement ( LCE ), Université Bourgogne Franche-Comté ( UBFC ) -Centre National de la Recherche Scientifique ( CNRS ) -Université de Franche-Comté ( UFC ), Ecole Polytechnique Fédérale de Lausanne ( EPFL ), Université de Neuchâtel |
| Jazyk: | angličtina |
| Rok vydání: | 2009 |
| Předmět: |
0106 biological sciences
010506 paleontology [SDE.MCG]Environmental Sciences/Global Changes Rare species Aquatic Science Biology 01 natural sciences [ SDV.EE ] Life Sciences [q-bio]/Ecology environment Filter mesh size Abundance 14. Life underwater Testate amoebae 0105 earth and related environmental sciences Earth-Surface Processes [SDV.EE]Life Sciences [q-bio]/Ecology environment [ SDE.BE ] Environmental Sciences/Biodiversity and Ecology Diversity Ecology 010604 marine biology & hydrobiology Palaeoecology Sediment Species diversity 15. Life on land [ SDE.MCG ] Environmental Sciences/Global Changes Taxon Lake sediment Paleoecology Thecamoebians Species richness ComputingMethodologies_GENERAL [SDE.BE]Environmental Sciences/Biodiversity and Ecology Bioindicator |
| Zdroj: | 5th International Symposium on Testate Amoebae 5th International Symposium on Testate Amoebae, Sep 2009, MONTBELIARD, France 5th ISTA: International Symposium on Testate Amoeba 5th ISTA: International Symposium on Testate Amoeba, Sep 2009, Montbeliard, France Journal of Paleolimnology Journal of Paleolimnology, Springer Verlag, 2010, 43, pp.689-704. ⟨10.1007/s10933-009-9360-5⟩ Journal of Paleolimnology, Springer Verlag, 2010, 43, pp.689-704. 〈10.1007s/s10933-009-9360-5〉 |
| ISSN: | 0921-2728 1573-0417 |
| DOI: | 10.1007/s10933-009-9360-5⟩ |
| Popis: | Online first; International audience; Testate amoebae are informative about palaeoecological conditions, but the methods generally used for their analyses in lake sediments differ from those used for their analyses in peats, making comparisons difficult. This study examines how filter mesh size and total number of individuals counted affect species richness, Shannon diversity, equitability, density and assemblage structure. We analysed the complete testate amoeba contents of six sediment samples from Lake Lautrey, France. The abundance of testate amoebae was high (1,403-10,870 shells.cm-3), and species smaller than 63 µm in both length and width represented up to 89% of total abundance and 43% of species richness. A simulation showed that using 47 µm or 63 µm mesh-size filters reduced inter-sample differences and changed the patterns of abundance, species richness and assemblage structure, causing loss of information and leading to potential erroneous palaeoecological interpretation. Rarefaction analyses suggest that although 170 shells are sufficient to assess the general structure of assemblages, such small sample sizes can underestimate species richness by overlooking taxa with relative abundances |
| Databáze: | OpenAIRE |
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