Testate amoebae taxonomy and trait diversity are coupled along an openness and wetness gradient in pine-dominated Baltic bogs.

Autor: Lamentowicz M; Laboratory of Climate Change Ecology, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University, Poznań, Poland. Electronic address: mariuszl@amu.edu.pl., Kajukało-Drygalska K; Laboratory of Climate Change Ecology, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University, Poznań, Poland., Kołaczek P; Laboratory of Climate Change Ecology, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University, Poznań, Poland., Jassey VEJ; ECOLAB, Laboratoire d'Ecologie Fonctionnelle et Environnement, Université de Toulouse, CNRS, Toulouse, France., Gąbka M; Department of Hydrobiology, Faculty of Biology, Adam Mickiewicz University in Poznań, Poland., Karpińska-Kołaczek M; Laboratory of Climate Change Ecology, Faculty of Geographical and Geological Sciences, Adam Mickiewicz University, Poznań, Poland; Center for the Study of Demographic and Economic Structures in Preindustrial Central and Eastern Europe University of Białystok, Poland.
Jazyk: angličtina
Zdroj: European journal of protistology [Eur J Protistol] 2020 Apr; Vol. 73, pp. 125674. Date of Electronic Publication: 2020 Jan 30.
DOI: 10.1016/j.ejop.2020.125674
Abstrakt: Sphagnum peatlands host a high abundance of protists, especially testate amoebae. Here, we designed a study to investigate the functional diversity of testate amoebae in relation to wetness and forest cover in Baltic bogs. We provided new data on the influence of openness/wetness gradient on testate amoebae communities, showing significant differences in selected testate amoebae (TA) traits. Three key messages emerged from our investigations: 1) we recorded an effect of peatland surface openness on testate amoebae functional traits that led us to accept the hypothesis that TA traits differ according to light intensity and hydrology. Mixotrophic species were recorded in high relative abundance in open plots, whereas they were nearly absent in forested sites; 2) we revealed a hydrological threshold for the occurrence of mixotrophic testate amoebae that might be very important in terms of peatland functioning and carbon sink vs. source context; and 3) mixotrophic species with organic tests were nearly absent in forested sites that were dominated by heterotrophic species with agglutinated or idiosomic tests. An important message from this study is that taxonomy of TA rather indicates the hydrological gradient whereas traits of mixotrophs the openness gradient.
(Copyright © 2020 The Author(s). Published by Elsevier GmbH.. All rights reserved.)
Databáze: MEDLINE
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