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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todo:paper_14622912_v18_n12_p5249_Schiaffino2023-10-03T16:16:34Z Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes Schiaffino, M.R. Lara, E. Fernández, L.D. Balagué, V. Singer, D. Seppey, C.C.W. Massana, R. Izaguirre, I. Antarctica biodiversity chemistry classification denaturing gradient gel electrophoresis eukaryote genetics geography isolation and purification lake parasitology Antarctic Regions Biodiversity Denaturing Gradient Gel Electrophoresis Eukaryota Geography 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 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. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14622912_v18_n12_p5249_Schiaffino |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Antarctica biodiversity chemistry classification denaturing gradient gel electrophoresis eukaryote genetics geography isolation and purification lake parasitology Antarctic Regions Biodiversity Denaturing Gradient Gel Electrophoresis Eukaryota Geography Lakes |
| spellingShingle |
Antarctica biodiversity chemistry classification denaturing gradient gel electrophoresis eukaryote genetics geography isolation and purification lake parasitology Antarctic Regions Biodiversity Denaturing Gradient Gel Electrophoresis Eukaryota Geography Lakes Schiaffino, M.R. Lara, E. Fernández, L.D. Balagué, V. Singer, D. Seppey, C.C.W. Massana, R. Izaguirre, I. 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 Biodiversity Denaturing Gradient Gel Electrophoresis Eukaryota Geography 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 |
| format |
JOUR |
| author |
Schiaffino, M.R. Lara, E. Fernández, L.D. Balagué, V. Singer, D. Seppey, C.C.W. Massana, R. Izaguirre, I. |
| author_facet |
Schiaffino, M.R. Lara, E. Fernández, L.D. Balagué, V. Singer, D. Seppey, C.C.W. Massana, R. Izaguirre, I. |
| author_sort |
Schiaffino, M.R. |
| 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 |
| url |
http://hdl.handle.net/20.500.12110/paper_14622912_v18_n12_p5249_Schiaffino |
| work_keys_str_mv |
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