PMID- 27709755 OWN - NLM STAT- MEDLINE DCOM- 20170807 LR - 20181202 IS - 1462-2920 (Electronic) IS - 1462-2912 (Linking) VI - 18 IP - 12 DP - 2016 Dec TI - Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes. PG - 5249-5264 LID - 10.1111/1462-2920.13566 [doi] AB - Microbial eukaryotes play important roles in aquatic ecosystem functioning. Unravelling their distribution patterns and biogeography provides important baseline information to infer the underlying mechanisms that regulate the biodiversity and complexity of ecosystems. We studied the distribution patterns and factors driving diversity gradients in microeukaryote communities (total, abundant, uncommon and rare community composition) along a latitudinal gradient of lakes distributed from Argentinean Patagonia to Maritime Antarctica using both denaturing gradient gel electrophoresis (DGGE) and high-throughput sequencing (Illumina HiSeq). DGGE and abundant Illumina operational taxonomic units (OTUs) showed both decreasing richness with latitude and significant differences between Patagonian and Antarctic lakes communities. In contrast, total richness did not change significantly across the latitudinal gradient, although evenness and diversity indices were significantly higher in Patagonian lakes. Beta-diversity was characterized by a high species turnover, influenced by both environmental and geographical descriptors, although this pattern faded in the rare community. Our results suggest the co-existence of a 'core biosphere' containing reduced number of abundant/dominant OTUs on which classical ecological rules apply, together with a much larger seedbank of rare OTUs driven by stochastic and reduced dispersal processes. These findings shed new light on the biogeographical patterns and forces structuring inland microeukaryote composition across broad spatial scales. CI - (c) 2016 Society for Applied Microbiology and John Wiley & Sons Ltd. FAU - Schiaffino, M Romina AU - Schiaffino MR AD - Centro de Investigaciones y transferencia del Noroeste de la Provincia de Buenos Aires, CONICET, UNNOBA, Junin, 6000, Argentina. FAU - Lara, Enrique AU - Lara E AD - Laboratory of Soil Biodiversity, University of Neuchatel, Rue Emile Argand 11, Neuchatel, CH-2000, Switzerland. FAU - Fernandez, Leonardo D AU - Fernandez LD AD - Laboratory of Soil Biodiversity, University of Neuchatel, Rue Emile Argand 11, Neuchatel, CH-2000, Switzerland. AD - Laboratorio de Ecologia Evolutiva y Filoinformatica, Departamento de Zoologia, Facultad de Ciencias Naturales y Oceanograficas, Universidad de Concepcion, Barrio Universitario s/n, Concepcion, Chile. AD - Facultad de Medicina Veterinaria y Agronomia, Universidad de Las Americas, Sede Concepcion, Chacabuco 539, Concepcion, Chile. FAU - Balague, Vanessa AU - Balague V AD - Institut de Ciencies del Mar, CSIC, Passeig Maritim de la Barceloneta 37-49, Barcelona, Catalonia, 08003, Spain. FAU - Singer, David AU - Singer D AD - Laboratory of Soil Biodiversity, University of Neuchatel, Rue Emile Argand 11, Neuchatel, CH-2000, Switzerland. FAU - Seppey, Christophe C W AU - Seppey CC AD - Laboratory of Soil Biodiversity, University of Neuchatel, Rue Emile Argand 11, Neuchatel, CH-2000, Switzerland. FAU - Massana, Ramon AU - Massana R AD - Institut de Ciencies del Mar, CSIC, Passeig Maritim de la Barceloneta 37-49, Barcelona, Catalonia, 08003, Spain. FAU - Izaguirre, Irina AU - Izaguirre I AD - Departamento de Ecologia, Genetica y Evolucion, IEGEBA (CONICET-UBA), Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires. Ciudad Universitaria, Buenos Aires, C1428EHA, Argentina. LA - eng PT - Journal Article DEP - 20161028 PL - England TA - Environ Microbiol JT - Environmental microbiology JID - 100883692 SB - IM MH - Antarctic Regions MH - Biodiversity MH - Denaturing Gradient Gel Electrophoresis MH - Eukaryota/classification/genetics/*isolation & purification MH - Geography MH - Lakes/chemistry/*parasitology EDAT- 2016/10/30 06:00 MHDA- 2017/08/08 06:00 CRDT- 2016/10/07 06:00 PHST- 2016/06/08 00:00 [received] PHST- 2016/09/30 00:00 [accepted] PHST- 2016/10/30 06:00 [pubmed] PHST- 2017/08/08 06:00 [medline] PHST- 2016/10/07 06:00 [entrez] AID - 10.1111/1462-2920.13566 [doi] PST - ppublish SO - Environ Microbiol. 2016 Dec;18(12):5249-5264. doi: 10.1111/1462-2920.13566. Epub 2016 Oct 28.