Antarctic bdelloid rotifers: diversity, endemism and evolution

Iakovenko, Nataliia; Smykla, Jerzy; Convey, Peter; Kašparová, Eva; Kozeretska, I. A.; Trokhymets, V.; Dykyy, Ihor; Plewka, Michael; Devetter, Miloslav; Ďuriš, Zdeněk; Janko, Karel

doi:10.1007/s10750-015-2463-2

Cited by 64 publications

(62 citation statements)

References 87 publications

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“…Our data suggest the presence of several distinct and old (∼1 Mya or older) Antarctic endemic species within Schistidium (namely S. antarctici, S. leptoneurum and S. lewis-smithii), indicating a long (certainly well before LGM) persistence of some of these species on the continent. Although other explanations like periodic recolonizations cannot be ruled out completely, the present data complement the recently-recognized and recurring pattern of long-term (pre-LGM) Antarctic presence across a range of terrestrial Antarctic biota, suggested from both molecular and classical biogeographic studies of all major extant faunal, floral and even microbial groups (Stevens and Hogg, 2003;Convey and Stevens, 2007;Convey et al, 2008Convey et al, , 2009De Wever et al, 2009;Vyverman et al, 2010;Fraser et al, 2014;Pisa et al, 2014;Chong et al, 2015;Iakovenko et al, 2015;Bennett et al, 2016). These findings combine to overturn a long-held but largely untested view that all Antarctic terrestrial life is of recent, post-LGM origin, derived from previous glaciological reconstructions suggesting extensive icesheets covered nearly all terrestrial areas and extended far onto the Antarctic continental shelf throughout the LGM and previous glaciations.…”

Section: Support For Long-term Antarctic Persistence Of Several Schissupporting

confidence: 88%

“…Implications of a pattern of distinct genotypes east of the mountainous spine of the Antarctic Peninsula, are also seen in other taxa including rotifers (Iakovenko et al, 2015) and diatoms (Kociolek et al, 2017), possibly providing further evidence supporting distinct bioregions on either side. The north-east and north-west Antarctic Peninsula have also been differentiated as distinct Antarctic Conservation Biogeographic Regions (ACBRs), based on multivariate analyses of regional biodiversity patterns (Terauds et al, 2012;Terauds and Lee, 2016).…”

Section: Diversity Patterns Within Schistidium Antarctici and Conservmentioning

confidence: 78%

“…Whilst only ∼0.18% of Antarctica is ice-free today (Burton-Johnson et al, 2016), reconstructions of Antarctica's past climate provide clear suggestions that, during the Last Glacial Maximum (LGM; ∼22-18 kya) as well as in previous glaciations, nearly all terrestrial areas in Antarctica were covered by thick, extensive ice sheets. Although terrestrial life must have been extremely limited during these periods, recent biogeographic and genetic studies find clear evidence for the occurrence of longterm (hundreds of thousands to millions and tens of millions of years) in situ persistence within most extant faunal and some microbial groups (Convey et al, , 2009Chong et al, 2015;Iakovenko et al, 2015;Bennett et al, 2016). Even with these recent advances, the origin and age of the extant Antarctic flora remain poorly studied, despite the flora playing a key role in Antarctic terrestrial ecosystems (Pisa et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Molecular Data Suggest Long-Term in Situ Antarctic Persistence Within Antarctica's Most Speciose Plant Genus, Schistidium

et al. 2018

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From glacial reconstructions it is clear that Antarctic terrestrial life must have been extremely limited throughout Quaternary glacial periods. In contrast, recent biological studies provide clear evidence for long-term in situ persistence throughout glacial times within most extant Antarctic faunal and several microbial groups. However, even now, the evolutionary history of the Antarctic flora-despite playing major role in Antarctic ecosystems-remains poorly studied. We assessed the diversity, richness and relative age divergences within Schistidium (Grimmiaceae, Bryophyta), the most species-rich plant genus in the Antarctic, as well as the plant genus containing most Antarctic endemic species. We applied phylogenetic and molecular dating methods based on nuclear ribosomal Internal Transcribed Spacer sequences, including all known Antarctic Schistidium species with available sample material. We additionally investigated the continent-wide genetic diversity within the most common Antarctic representative of the genus-the endemic species Schistidium antarctici-and performed preliminary phylogeographic analyses of the bipolar species Schistidium rivulare. Most previously described Antarctic Schistidium species were genetically distinct, confirming their specific status. Interspecific divergences of all species took place at least ∼1 Mya, suggesting a likely in situ persistence in Antarctica for (at least) all endemic Schistidium species. The widespread endemic species, Schistidium antarctici, diverged from other Antarctic congeners in the late Miocene, thereby revealing the oldest extant plant species currently known in Antarctica, and providing increasing support for the hypothesis of vegetation survival through multiple glacial periods. Within S. antarctici we identified several distinct clades dividing the eastern Antarctic Peninsula and Scotia Arc islands from the western Antarctic Peninsula and all continental locations. This suggests that the mountainous spine on the Antarctic Peninsula forms a strong barrier to gene flow in this species, while increased genetic diversity in the northern Maritime Antarctic indicates likely glacial refugia in this area. This study provides an important first step toward assessing the diversity and evolutionary history of the most speciose moss genus in the Antarctic. The multi-million year presence of several endemic species contributes to studies on their adaptive potential to survive climate change over both historical and contemporary timescales.

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Section: Support For Long-term Antarctic Persistence Of Several Schissupporting

confidence: 88%

Section: Diversity Patterns Within Schistidium Antarctici and Conservmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

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Molecular Data Suggest Long-Term in Situ Antarctic Persistence Within Antarctica's Most Speciose Plant Genus, Schistidium

et al. 2018

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“…Literature list: Nine additional papers were found to update the data set for the period 2015 to 2018: De Smet (2015), Iakovenko et al (2015), Sharov et al (2015), Zawierucha et al (2015), De Smet and Segers (2017), Gantait and Chandra (2017), Rochera et al (2017), Smykla et al (2018), andVelasco-Castrillón et al (2018). In addition, other 20 papers published before 2015 but reporting unidentified rotifers were included in the current data set: Steele et al (1994), Miller et al (1996, 2001, Vincent andJames (1996), McInnes et al (2001), Sinclair (2001), Sinclair andSjursen (2001), McInnes (2003), Sohlenius et al (2004), McInnes and Convey (2005), Barrett et al (2006), Cromer et al (2006), Newsham et al (2006), Nkem et al (2006), Ayres et al (2007), Sohlenius and Boström (2008), Simmons et al (2009), Yeates et al (2009), Hodgson et al (2010), Smyckla et al (2012.…”

Section: Data Setmentioning

confidence: 99%

A data set on the distribution of Rotifera in Antarctica

Garlasché¹,

Karimullah²,

Iakovenko³

et al. 2019

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We present a data set on Antarctic biodiversity for the phylum Rotifera, making it publicly available through the Antarctic Biodiversity Information facility. We provide taxonomic information, geographic distribution, location, and habitat for each record. The data set gathers all the published literature about rotifers found and identified across the Continental, Maritime, and Subantarctic biogeographic regions of Antarctica. A total of 1455 records of rotifers in Antarctica found from 1907 to 2018 is reported, with information on taxonomic hierarchies, updated nomenclature, geographic information, geographic coordinates, and type of habitat. The aim is to provide a georeferenced data set on Antarctic rotifers as a baseline for further studies, to improve our knowledge on what has been considered one of the most diverse and successful groups of animals living in Antarctica.

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“…Micro-organismos podem ser classificados de acordo com tais características ambientais, podendo ainda ser subdivididos entre obrigatórios ou tolerantes. GOOSEFF; ADAMS,, 2018;BOWMAN et al, 2016;HUGHES et al, 2015;IAKOVENKO et al, 2015).…”

Section: Prospecção Em Ambientes Extremosunclassified

Actinobactérias da Antártica produtoras de compostos anticâncer

Silva¹

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Antarctic bdelloid rotifers: diversity, endemism and evolution

Cited by 64 publications

References 87 publications

Molecular Data Suggest Long-Term in Situ Antarctic Persistence Within Antarctica's Most Speciose Plant Genus, Schistidium

Molecular Data Suggest Long-Term in Situ Antarctic Persistence Within Antarctica's Most Speciose Plant Genus, Schistidium

A data set on the distribution of Rotifera in Antarctica

Actinobactérias da Antártica produtoras de compostos anticâncer

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