High levels of genetic variability in the moss Ceratodon purpureus from continental Antarctica, subantarctic Heard and Macquarie Islands, and Australasia

Skotnicki, M. L.; Mackenzie, A. M.; Ninham, J; Selkirk, P. M.

doi:10.1007/s00300-004-0640-2

Cited by 28 publications

(33 citation statements)

References 26 publications

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“…pseudotriquetrum subassociation which is strongly associated with meltwater streams and pools, and the fourth, the C. purpureus subassociation occurred on sandy or silty soils among moraine debris. C. purpureus itself showed a very high genetic variability within and among colonies (Skotnicki et al 2004). Algal-dominated crusts seem to be rare in this area, with P. crispa covering only 1.8 % (Seppelt et al 2010).…”

Section: Victoria Landmentioning

confidence: 97%

Biological Soil Crusts

Büdel

Colesie

2014

Antarctic Terrestrial Microbiology

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Section: Victoria Landmentioning

confidence: 97%

Biological Soil Crusts

Büdel

Colesie

2014

Antarctic Terrestrial Microbiology

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“…The change from RAPD and RFLP to ISSR/microsatellites and AFLP has also taken place in bryophytes, although a number of analyses of genetic variation in Antarctic mosses based on RAPD were published until 2004 (e.g. Skotnicki et al 2002Skotnicki et al , 2004 and the most recent RAPD analyses dates from 2008 (Li et al 2008).…”

Section: Fingerprinting Methodsmentioning

confidence: 99%

20,000 species and five key markers: The status of molecular bryophyte phylogenetics

Stech¹,

Quandt²

2014

Phytotaxa

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A number of reviews have accompanied and monitored the progress of molecular phylogenetic research on bryophytes, focusing on the publication record itself, bryophyte phylogeny and systematics in the molecular era, as well as the evolution and phylogenetic utility of markers from different genomes. However, none of the recent reviews include a detailed characterization of all molecular markers used in bryophyte phylogenetics. Here we provide an overview of the history and current state of marker utilization, including coding and non-coding sequence markers from all three genomes as well as fingerprinting approaches. The molecular architecture and evolutionary peculiarities, as well as practical aspects such as amplification and sequencing strategies, are outlined for the DNA sequence markers, with a focus on the most commonly employed regions. Their phylogenetic utility and potential for solving some of the remaining, pressing questions in bryophyte phylogeny, as well as their suitability for molecular species identification by DNA barcoding, are discussed.

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“…In several species, substantial variation occurs within clumps, such that although paired shoots are typically (though not always) identical, the distance between shoots increases with the decrease in relatedness (Selkirk et al 1998;Skotnicki et al 1998aSkotnicki et al ,b, 1999aSkotnicki et al ,b, 2002Skotnicki et al , 2004Dale et al 1999). This within-clump variation has been attributed to high rates of somatic mutation.…”

Section: Introductionmentioning

confidence: 99%

Spatial and temporal variability across life's hierarchies in the terrestrial Antarctic

Chown

Convey

2007

Phil. Trans. R. Soc. B

193

197

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Antarctica and its surrounding islands lie at one extreme of global variation in diversity. Typically, these regions are characterized as being species poor and having simple food webs. Here, we show that terrestrial systems in the region are nonetheless characterized by substantial spatial and temporal variations at virtually all of the levels of the genealogical and ecological hierarchies which have been thoroughly investigated. Spatial variation at the individual and population levels has been documented in a variety of genetic studies, and in mosses it appears that UV-B radiation might be responsible for within-clump mutagenesis. At the species level, modern molecular methods have revealed considerable endemism of the Antarctic biota, questioning ideas that small organisms are likely to be ubiquitous and the taxa to which they belong species poor. At the biogeographic level, much of the relatively small ice-free area of Antarctica remains unsurveyed making analyses difficult. Nonetheless, it is clear that a major biogeographic discontinuity separates the Antarctic Peninsula and continental Antarctica, here named the 'Gressitt Line'. Across the Southern Ocean islands, patterns are clearer, and energy availability is an important correlate of indigenous and exotic species richness, while human visitor numbers explain much of the variation in the latter too. Temporal variation at the individual level has much to do with phenotypic plasticity, and considerable lifehistory and physiological plasticity seems to be a characteristic of Antarctic terrestrial species. Environmental unpredictability is an important driver of this trait and has significantly influenced life histories across the region and probably throughout much of the temperate Southern Hemisphere. Rapid climate change-related alterations in the range and abundance of several Antarctic and subAntarctic populations have taken place over the past several decades. In many sub-Antarctic locations, these have been exacerbated by direct and indirect effects of invasive alien species. Interactions between climate change and invasion seem set to become one of the most significant conservation problems in the Antarctic. We conclude that despite the substantial body of work on the terrestrial biodiversity of the Antarctic, investigations of interactions between hierarchical levels remain scarce. Moreover, little of the available information is being integrated into terrestrial conservation planning, which lags far behind in this region by comparison with most others.

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High levels of genetic variability in the moss Ceratodon purpureus from continental Antarctica, subantarctic Heard and Macquarie Islands, and Australasia

Cited by 28 publications

References 26 publications

Biological Soil Crusts

Biological Soil Crusts

20,000 species and five key markers: The status of molecular bryophyte phylogenetics

Spatial and temporal variability across life's hierarchies in the terrestrial Antarctic

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