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

Schiaffino, M. Romina; Lara, Enrique; Fernández, Leonardo; Balagué, Vanessa; Seppey, Christophe C. W.; Massana, Ramón; Izaguirre, Irina

doi:10.1111/1462-2920.13566

Cited by 46 publications

(40 citation statements)

References 114 publications

(162 reference statements)

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“…In accordance with our findings, a large genetic divergence between distinct lake microbial communities has been reported in recent deep-sequencing campaigns, in particular for the rare biosphere (Filker et al 2016, Grossmann et al 2016b, Triadó-Margarit and Casamayor 2012. In particular, distribution patterns of rare taxa seem to vary widely and to deviate from the rather uniform patterns in abundant protists (Grossmann et al 2016a, Schiaffino et al 2016). This confirms recent claims that distribution patterns are almost certainly differential, with some taxa being ubiquitous whereas others are rather endemic, as proposed for instance by the moderate endemicity model.…”

Section: Eukaryotic Microbial Molecular Diversity In European Freshwasupporting

confidence: 91%

“…However, recent data provide increasing evidence that beyond the ecological factors also geographic distance and historical factors affect protist distribution at least on large scales (Filker et al 2016, Schiaffino et al 2016, Fernández et al 2017. Europe is a well-investigated (if not the best-investigated) area for biogeographic patterns (Hewitt 2000, Schmitt 2009).…”

Section: Contribution Of Biogeography and Historical Factors To The Dmentioning

confidence: 99%

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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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Section: Eukaryotic Microbial Molecular Diversity In European Freshwasupporting

confidence: 91%

Section: Contribution Of Biogeography and Historical Factors To The Dmentioning

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

View full text Add to dashboard Cite

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“…Moreover, Schiaffiano et al. () reported a non‐significant LDG (latitudinal range 45–63°S) for microeukaryotic lake taxa using molecular fingerprinting methods. In a global study, Soininen et al.…”

Section: Introductionmentioning

confidence: 99%

Fifteen important questions in the spatial ecology of diatoms

Soininen

Teittinen

2019

Freshwater Biology

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Recently, studies about the spatial distribution of microbial species and communities have increased substantially. Freshwater diatoms are used as one of the most popular model taxa in such macroecological studies, but the most exciting patterns in the spatial ecology of diatoms have not been reviewed. Here, we identify 15 important questions about freshwater diatom ecology, review the major findings, and suggest novel research avenues. We found that diatoms do not support classical latitudinal diversity gradient, species–area relationship or Rapoport's rule. We found some, albeit inconsistent support for an elevational diversity gradient, Bergmann's rule and niche conservation. Diatoms do support a positive interspecific abundance–occupancy relationship like nearly all other taxa. With regards to metacommunity dynamics, diatom communities are typically structured by species sorting, but neutral dynamics or mass effects are also evident at large or small spatial scale, respectively. Taken together, this review suggests that diatoms follow some classical biogeographical patterns similarly to larger taxa, but patterns are typically weaker than for macro‐organisms. This may result because diatoms are typically relatively strongly controlled by local factors and often exhibit efficient stochastic dispersal processes both at small and large scales. More research is needed to build a more comprehensive view of diatom species–area relationships and latitudinal gradients in diversity, for example. In the future, well‐replicated macroecological field experiments, diatom studies with intercontinental or global coverage, trait‐based approaches, and DNA‐based species identification would be fruitful avenues to shed more light into the spatial ecology of diatoms.

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“…FW samples consisted in plankton that were pre-filtered at different size fractions, with an initial pre-filtration through 50 μm mesh (Table S2). The filters were placed in cryovials with 1.8 ml of lysis buffer (40 mM EDTA, 50 mM Tris-HCl, 0.75 M sucrose) and stored at −80 C until DNA extraction (see Schiaffino et al, 2016). Nucleic acids extraction was conducted using the kit PowerSoil ® DNA Isolation Kit (Qiagen).…”

Section: Phylogenetic Tree Annotationmentioning

confidence: 99%

“…Because we wanted to consider only samples that contained a significant population of Trebouxiophyceae, samples with less than 10 sequences in total were excluded. Indeed, the ecological relevance of rare sequences in Illumina-based environmental diversity survey can be subject to controversy (Schiaffino et al, 2016). All obtained OTUs with their respective affiliations are detailed in Table S3.…”

Section: Generation Of the Community Matrix (Otu Table)mentioning

confidence: 99%

Global distribution of Trebouxiophyceae diversity explored by high‐throughput sequencing and phylogenetic approaches

Metz

Domaizon

Unrein

et al. 2019

Environmental Microbiology

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Summary Trebouxiophyceae are a ubiquitous class of Chlorophyta encountered in aquatic and terrestrial environments. Most taxa are photosynthetic, and many acts as photobionts in symbiotic relationships, while others are free‐living. Trebouxiophyceae have also been widely investigated for their use for biotechnological applications. In this work, we aimed at obtaining a comprehensive image of their diversity by compiling the information of 435 freshwater, soil and marine environmental DNA samples surveyed with Illumina sequencing technology in order to search for the most relevant environments for bioprospecting. Freshwater and soil were most diverse and shared more than half of all operational taxonomic units (OTUs), however, their communities were significantly distinct. Oceans hosted the highest genetic novelty, and did not share any OTUs with the other environments; also, marine samples host more diversity in warm waters. Symbiotic genera usually found in lichens such as Trebouxia, Myrmecia and Symbiochloris were also abundantly detected in the ocean, suggesting either free‐living lifestyles or unknown symbiotic relationships with marine planktonic organisms. Altogether, our study opens the way to new prospection for trebouxiophycean strains, especially in understudied environments like the ocean.

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

Cited by 46 publications

References 114 publications

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

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

Fifteen important questions in the spatial ecology of diatoms

Global distribution of Trebouxiophyceae diversity explored by high‐throughput sequencing and phylogenetic approaches

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