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TitlePalaeoecology of testate amoebae in a tropical peatland
AuthorSwindles, G T; Lamentowicz, M; Reczuga, M; Galloway, J M
Sourcevol. 55, pt. B, 2016 p. 181-189, https://doi.org/10.1016/j.ejop.2015.10.002
Year2016
Alt SeriesEarth Sciences Sector, Contribution Series 20150270
PublisherElsevier
Documentserial
Lang.English
Mediapaper; on-line; digital
File formatpdf
AreaAucayacu peatland; Loreto region; Peru
Lat/Long WENS -73.2500 -72.4667 -2.2500 -2.8333
Subjectsfossil assemblages; peatlands; core samples; core studies; Testate ameobae; Centropyxis aculeata; Hyalosphenia subflava; Phryganella acropodia; Trigonopyxis arcula; water table; ecohydrology
Illustrationssatellite images; location maps; fossil charts; tables; plots
ProgramTools for environmental impacts and adaptation for metal mining, Environmental Geoscience
AbstractWe present the first detailed analysis of subfossil testate amoebae from a tropical peatland.Testate amoebae were analysed from a 3-m peat core from western Amazonia (Peru) and a transfer function developed from the site was applied to reconstruct changes in water table over the past ca. 8,000 years. Testate amoebae were in very low abundance in the core, especially in the lower 125 cm, due to a combination of poor preservation and obscuration by other organic matter. A modified preparation method enabled at least 50 testate amoebae to be counted in each core sample. The most abundant taxa preserved include Centropyxis aculeata, Hyalosphenia subflava, Phryganella acropodia and Trigonopyxis arcula. Centropyxis aculeata, an unambiguous wet indicator, is variably present and indicates several phases of near-surface water table. Our work shows that even degraded, low abundance assemblages of testate amoebae can provide useful information regarding the long-term ecohydrological developmental history of tropical peatlands.
Summary(Plain Language Summary, not published)
We present the first detailed analyses of subfossil testate amoebae from a tropical peatland in western Amazonia (Peru). We used a transfer function developed from this site to reconstruct changes in water table over the past 8000 years. We show that several phases of near-surface water table occurred. Our work demonstrates that even low abundances assemblages of testate amoebae can yield insight into long-term ecohydrological development history of tropical peatlands.
GEOSCAN ID297062