Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes
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 pat...
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ftunibueairesbd:paper:paper_14622912_v18_n12_p5249_Schiaffino 2023-05-15T13:51:25+02:00 Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes Schiaffino, Maria Romina Izaguirre, Irina 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14622912_v18_n12_p5249_Schiaffino https://hdl.handle.net/20.500.12110/paper_14622912_v18_n12_p5249_Schiaffino unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14622912_v18_n12_p5249_Schiaffino http://hdl.handle.net/20.500.12110/paper_14622912_v18_n12_p5249_Schiaffino Antarctica biodiversity chemistry classification denaturing gradient gel electrophoresis eukaryote genetics geography isolation and purification lake parasitology Antarctic Regions Eukaryota Lakes 2016 ftunibueairesbd https://doi.org/20.500.12110/paper_14622912_v18_n12_p5249_Schiaffino 2023-02-16T02:17:41Z 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. © 2016 Society for Applied Microbiology and John Wiley & Sons Ltd Fil:Schiaffino, M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Izaguirre, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Other/Unknown Material Antarc* Antarctic Antarctica Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Antarctic Argentina Patagonia |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
Antarctica biodiversity chemistry classification denaturing gradient gel electrophoresis eukaryote genetics geography isolation and purification lake parasitology Antarctic Regions Eukaryota Lakes |
spellingShingle |
Antarctica biodiversity chemistry classification denaturing gradient gel electrophoresis eukaryote genetics geography isolation and purification lake parasitology Antarctic Regions Eukaryota Lakes Schiaffino, Maria Romina Izaguirre, Irina Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes |
topic_facet |
Antarctica biodiversity chemistry classification denaturing gradient gel electrophoresis eukaryote genetics geography isolation and purification lake parasitology Antarctic Regions Eukaryota Lakes |
description |
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. © 2016 Society for Applied Microbiology and John Wiley & Sons Ltd Fil:Schiaffino, M.R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Izaguirre, I. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. |
author |
Schiaffino, Maria Romina Izaguirre, Irina |
author_facet |
Schiaffino, Maria Romina Izaguirre, Irina |
author_sort |
Schiaffino, Maria Romina |
title |
Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes |
title_short |
Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes |
title_full |
Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes |
title_fullStr |
Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes |
title_full_unstemmed |
Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes |
title_sort |
microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of patagonian and antarctic lakes |
publishDate |
2016 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14622912_v18_n12_p5249_Schiaffino https://hdl.handle.net/20.500.12110/paper_14622912_v18_n12_p5249_Schiaffino |
geographic |
Antarctic Argentina Patagonia |
geographic_facet |
Antarctic Argentina Patagonia |
genre |
Antarc* Antarctic Antarctica |
genre_facet |
Antarc* Antarctic Antarctica |
op_relation |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14622912_v18_n12_p5249_Schiaffino http://hdl.handle.net/20.500.12110/paper_14622912_v18_n12_p5249_Schiaffino |
op_doi |
https://doi.org/20.500.12110/paper_14622912_v18_n12_p5249_Schiaffino |
_version_ |
1766255276743196672 |