Molecular Evidence for Distinct Antarctic Lineages in the Cosmopolitan Terrestrial Diatoms Pinnularia borealis and Hantzschia amphioxys

Souffreau, Caroline; Vanormelingen, Pieter; Vijver, Bart Van de; Isheva, Tsvetelina; Verleyen, Elie; Sabbe, Koen; Vyverman, Wim

doi:10.1016/j.protis.2012.04.001

Cited by 81 publications

(75 citation statements)

References 73 publications

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“…Another theory of protist distribution, the moderate endemicity model, was proposed which admits the existence of endemic species (Foissner, 1999, 2006). For example, Antarctic and Arctic endemites are common within diatom species complexes (Souffreau et al ., 2013; Kociolek et al ., 2017; Pinseel et al ., 2017). Antarctic microchlorophytes (De Wever et al ., 2009) or Prasiola (Moniz et al ., 2012) also possess endemic lineages.…”

Section: Discussionmentioning

confidence: 99%

Molecular and morphological diversity of Zygnema and Zygnemopsis (Zygnematophyceae, Streptophyta) from Svalbard (High Arctic)

Pichrtová

Holzinger

Kulichová

et al. 2018

European Journal of Phycology

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Filamentous conjugating green microalgae (Zygnematophyceae, Streptophyta) belong to the most common primary producers in polar hydro-terrestrial environments such as meltwater streamlets and shallow pools. The mats formed by these organisms are mostly composed of sterile filaments with Zygnema morphology, but the extent of their diversity remains unknown. Traditional taxonomy of this group is based on reproductive morphology, but sexual reproduction (conjugation and formation of resistant zygospores) is very rare in extreme conditions. In the present study we gave the first record of zygospore formation in Svalbard field samples, and identified conjugating filaments as Zygnemopsis lamellata and Zygnema cf. calosporum. We applied molecular phylogeny to study genetic diversity of sterile Zygnema filaments from Svalbard in the High Arctic. Based on analysis of 143 rbcL sequences, we revealed a surprisingly high molecular diversity: 12 Arctic Zygnema genotypes and one Zygnemopsis genotype were found. In addition, we characterized individual Arctic genotypes based on cell width and chloroplast morphology using light and confocal laser scanning microscopy. Our findings highlight the importance of a molecular approach when working with sterile filamentous Zygnematophyceae, as hidden diversity might be very beneficial for adaptation to harsh environmental conditions, and experimental results could be misinterpreted when hidden diversity is neglected.

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Section: Discussionmentioning

confidence: 99%

Molecular and morphological diversity of Zygnema and Zygnemopsis (Zygnematophyceae, Streptophyta) from Svalbard (High Arctic)

Pichrtová

Holzinger

Kulichová

et al. 2018

European Journal of Phycology

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“…amphioxys is also a species that easily resists dry periods (e.g. Souffreau et al, 2013). And finally Diadesmis contenta var.…”

Section: Diatom Communities Of Shallower Lakes (B)mentioning

confidence: 99%

Benthic diatom communities in high altitude lakes: a large scale study in the French Alps

Feret¹,

Bouchez²,

Rimet³

2017

Ann. Limnol. - Int. J. Lim.

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-Altitude lakes are weakly impacted by human activities. This makes them choice ecosystems to understand how biological communities are impacted by natural factors. This question was addressed to littoral benthic diatoms, a largely used ecological indicator. We wanted to know if benthic diatoms in lakes are more impacted by local varying factors (altitude, lake depth...) or regional varying factors (geology). The study area takes place in the Northern French Alps. Littoral benthic diatoms of 63 natural lakes situated between 1350 and 2700 m · a.s.l. were sampled. Two categories of communities were observed: one of deep and lower altitude lakes and one of higher altitude and shallower lakes. In each category, communities were characterized and were corresponding to particular lake types: lakes dominated by a particular geology, lakes with a water level fluctuation, turbid lakes,... Communities did not show a spatial structure. We observed that local factors were more important than regional factors. Indeed, the study area displayed a mixed geology even at a local level. On another hand, altitude a local varying factor determines freezing period a determining item of high-altitude lake functioning.

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“…Recently, Souffreau et al [18] applied the principles of molecular phylogenetics and presented evidence on a distinct Antarctic lineage of P.…”

Section: Introductionmentioning

confidence: 99%

“…An assessment of the molecular divergence revealed P. borealis as the oldest known diatom species complex, and the Antarctic lineage of this taxon is estimated to have diverged after the geographical and thermal isolation of the Antarctic continent. In addition, the temperature-dependent growth characteristics (lower optimal growth temperature and upper lethal temperature) indicate a niche differentiation in the Antarctic lineage of P. borealis (Souffreau et al [18]). …”

Section: Introductionmentioning

confidence: 99%

Observations on the Genus Pinnularia Section Distantes (Bacillariophyta) From Macedonia; Diversity and Distribution

Pavlov¹,

Levkov²

2017

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Pinnularia is one of the largest and widely distributed freshwater diatom genera. Nevertheless, dedicated taxonomic studies to the section Distantes of Pinnularia are rather few. A notable diversity of Pinnularia taxa from the section Distantes has been observed from a variety of aquatic habitats оn several mountain areas in Macedonia. In total, 12 taxa have been observed, of which three are described as new species: Pinnularia idsbensis, P. micevskii and P. subalpina. The main morphological features are given for all of the observed taxa. The distinctive features for the new species, in comparison with allied taxa, are also provided. Additional notes are given for the distribution and habitats where every taxon was observed. The habitats vary in type and altitude including high mountain lakes of glacial and non-glacial origin, springs, streams, rivers, rivulets and peat bogs, as well as aerated old drinking water wells and permanent or temporary wet rocks.

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Molecular Evidence for Distinct Antarctic Lineages in the Cosmopolitan Terrestrial Diatoms Pinnularia borealis and Hantzschia amphioxys

Cited by 81 publications

References 73 publications

Molecular and morphological diversity of Zygnema and Zygnemopsis (Zygnematophyceae, Streptophyta) from Svalbard (High Arctic)

Molecular and morphological diversity of Zygnema and Zygnemopsis (Zygnematophyceae, Streptophyta) from Svalbard (High Arctic)

Benthic diatom communities in high altitude lakes: a large scale study in the French Alps

Observations on the Genus Pinnularia Section Distantes (Bacillariophyta) From Macedonia; Diversity and Distribution

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