Drivers of phytoplankton diversity in Patagonian and Antarctic lakes across a latitudinal gradient (2150 km): the importance of spatial and environmental factors

Izaguirre, Irina; Saad, Juan Francisco; Schiaffino, M. Romina; Vinocur, Alicia; Tell, Guillermo; Sánchez, María Laura; Allende, Luz; Sinistro, Rodrigo

doi:10.1007/s10750-015-2269-2

Cited by 33 publications

(20 citation statements)

References 60 publications

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“…Accordingly, cell abundances (both auto‐ and heterotrophic) decreased also with latitude and were significantly higher in Patagonia than in Antarctica, probably corresponding to the abundant part of diversity (Tables and ). Similar decreases with latitude of cell abundances and richness of the dominant taxa were previously observed for bacterioplankton (Schiaffino et al ., ) and phytoplankton (Izaguirre et al ., ) in the studied lakes, and for autotrophic picoplankton in the Atlantic Southern Ocean (Doolittle et al ., ).…”

Section: Discussionmentioning

confidence: 99%

“…the Magellan Strait and the Drake Passage), that allow not only assessing their diversity patterns but also the importance of environmental and geographical factors in determining these patterns. Previous studies on microbial diversity patterns across Patagonian and Antarctic lakes have found a decreasing latitudinal diversity gradient for diatoms (Maidana et al ., ), Chlorococcales (Tell et al ., ), phytoplankton (Izaguirre et al ., ), and bacterioplankton (Schiaffino et al ., ).…”

Section: Introductionmentioning

confidence: 97%

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Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes

Schiaffino

Lara

Fernández

et al. 2016

Environmental Microbiology

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Summary 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.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 97%

Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes

Schiaffino

Lara

Fernández

et al. 2016

Environmental Microbiology

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“…Most, if not all, microbial ecologists meanwhile agree that at least some single-celled organisms have limited distribution patterns (Filker et al 2016, Kammerlander et al 2015, van der Gast 2014, Wu et al 2009) and that on a larger scale, historical and geographic factors may also affect protist distribution and dispersal (Filker et al 2016, Izaguirre et al 2015. However, despite indications of large-scale variation between protist communities, geographical factors are considered to be of minor importance at short to intermediate distances (Beisner et al 2006, Filker et al 2016.…”

Section: Introductionmentioning

confidence: 99%

Geographic distance and mountain ranges structure freshwater protist communities on a European scalе

Boenigk¹,

Wodniok²,

Böck³

et al. 2018

Metabarcoding and Metagenomics

113

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Protists influence ecosystems by modulating microbial population size, diversity, metabolic outputs and gene flow. In this study we used eukaryotic ribosomal amplicon diversity from 218 European freshwater lakes sampled in August 2012 to assess the effect of mountain ranges as biogeographic barriers on spatial patterns and microbial community structure in European freshwaters. The diversity of microbial communities as reflected by amplicon clusters suggested that the eukaryotic microbial inventory of lakes was well-sampled at the European and at the local scale. Our pan-European diversity analysis indicated that biodiversity and richness of high mountain lakes differed from that of lowland lakes. Further, the taxon inventory of high-mountain lakes strongly contributed to beta-diversity despite a low taxon inventory. Even though ecological factors, in general, strongly affect protist community pattern, we show that geographic distance and geographic barriers significantly contribute to community composition particularly for high mountain regions which presumably act as biogeographic islands. However, community composition in lowland lakes was also affected by geographic distance but less pronounced as in high mountain regions. In consequence protist populations are locally structured into distinct biogeographic provinces and community analyses revealed biogeographic patterns also for lowland lakes whereby European mountain ranges act as dispersal barriers in particular for short to intermediate distances whereas the effect of mountain ranges levels off on larger scale.protists (algae) are the dominant primary producers in aquatic ecosystems and contribute roughly 50 % to global primary production, i.e. they are of similar importance as land plants. Heterotrophic protists, on the other hand, are the primary agents of the top-down control of bacteria and primary producers and are thus key organisms in determining the fate and transport of organic matter in nature (Boenigk and Arndt 2002, Caron 2001, Foissner 1987, Sherr et al. 2007) .Increasing our knowledge of biodiversity distribution patterns at any level of the tree of life is of paramount ecological and evolutionary significance (Campo et al.

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“…On the top of this, natural depressions are distributed that collect water from the snow during winter and from rain during the rest of the year (Pereyra et al 2002). In general, the lakes thus formed are shallow (< 5 m of maximum depth) and range from mesotrophic to eutrophic (Izaguirre et al 2016). The lakes figuring in the present paper as find sites of the desmid species discussed are located in two dif-ferent zones: Strobel Plateau and Buenos Aires Plateau (Fig.…”

Section: Methodsmentioning

confidence: 55%

“…Cosmarium decussare, was encountered in the framework of a large-scale plankton research programme (Izaguirre et al 2016). Lakes where this species was found are characterized by pH values between 8 and 9, and conductivity values generally ranging from 100 to 500 µS.cm -1 so may be marked as alkaline and mesotrophic (Table 1).…”

Section: Resultsmentioning

confidence: 99%

Remarkable desmid species from the southern Patagonian highlands

Coesel¹,

Porcel²,

Geest³

et al. 2017

Fottea

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Abstract:Phytoplankton research in a number of shallow lakes in southern Patagonia revealed the occurrence of three noteworthy Cosmarium species. One of them, Cosmarium decussare Brook et Williamson, found only once before in Antarctica, is remarkable for its highly asymmetric cell morphology. The other two species, Cosmarium chapuense and Cosmarium mickeyoides, striking by an unusual cell shape, are described as new to science. Ecological and biogeographical characteristics are discussed.

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Drivers of phytoplankton diversity in Patagonian and Antarctic lakes across a latitudinal gradient (2150 km): the importance of spatial and environmental factors

Cited by 33 publications

References 60 publications

Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes

Microbial eukaryote communities exhibit robust biogeographical patterns along a gradient of Patagonian and Antarctic lakes

Geographic distance and mountain ranges structure freshwater protist communities on a European scalе

Remarkable desmid species from the southern Patagonian highlands

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