The cosmopolitan moss Bryum argenteum in Antarctica: recent colonisation or in situ survival?

Pisa, Sergio; Biersma, Elisabeth M.; Convey, Peter; Patiño, Jairo; Vanderpoorten, Alain; Werner, Olaf; Ros, Rosa M.

doi:10.1007/s00300-014-1537-3

Cited by 59 publications

(75 citation statements)

References 57 publications

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“…In a review of European Holocene bryophyte history, Kyrkjeeide et al (2014) found no cases of unambiguous evidence for in situ survival within the area of the Scandinavian ice sheet. This is in contrast to evidence of in situ survival of Antarctic populations of the moss Bryum argenteum (Pisa et al 2014) as well as an increasingly wide range of Antarctic microorganisms and invertebrates (Convey et al 2008(Convey et al , 2009Pointing et al 2015).…”

Section: Could Bryophytes Have Persisted In Situ?contrasting

confidence: 87%

Future directions and priorities for Arctic bryophyte research

et al. 2017

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The development of evidence-based international strategies for the conservation and management of Arctic ecosystems in the face of climate change is hindered by critical knowledge gaps in Arctic floristic diversity and evolution. Particularly poorly studied are the bryophytes, which dominate the vegetation across vast areas of the Arctic and consequently play an important role in global biogeochemical cycles. Currently, much of what is known about Arctic floristic evolution is based on studies of vascular plants. Bryophytes, however, possess a number of features, such as poikilohydry, totipotency, several reproductive strategies, and the ability to disperse through microscopic diaspores, that may cause their responses to Arctic environments to differ from those of the vascular plants. Here we discuss several priority areas identified in the Arctic Council's "Arctic Biodiversity Assessment" that are necessary to illuminate patterns of Arctic bryophyte evolution and diversity, including dispersal, glacial refugia, local adaptation, and ecological interactions with bryophyte-associated microbiomes. A survey of digitally available herbarium data archived in the largest online aggregate, GBIF, across the Arctic to boreal zones indicates that sampling coverage of mosses is heterogeneous and relatively sparse in the Arctic sensu stricto. A coordinated international effort across the Arctic will be necessary to address knowledge gaps in Arctic bryophyte diversity and evolution in the context of ongoing climate change.Key words: biodiversity, dispersal, local adaptation, microbiome, phylogeography.

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Section: Could Bryophytes Have Persisted In Situ?contrasting

confidence: 87%

Future directions and priorities for Arctic bryophyte research

et al. 2017

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“…As with marine groups, substantial cryptic diversity has been unveiled in the terrestrial metazoan biota 42,45 and its diversity is likely much higher than is currently 7 appreciated. Moreover, for most groups, including those that are considered well known, the full extent and structure of the continent's diversity remains partially understood because much of it has not been thoroughly surveyed 46 .…”

Section: Diversity In the Terrestrial Biotamentioning

confidence: 99%

“…With the onset of the ACC came circumpolar thermal fronts such as the Subtropical Front (STF) and Antarctic Polar Front (APF) (Fig. 1) 45,46 .…”

Section: Diminishing Isolation 12mentioning

confidence: 99%

The changing form of Antarctic biodiversity

Chown

Clarke

Fraser

et al. 2015

Nature

284

219

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Antarctic biodiversity is much more extensive, ecologically diverse and biogeographically structured than previously thought. Understanding of how this diversity is distributed in marine and terrestrial systems, the mechanisms underlying its spatial variation, and the significance of the microbiota is growing rapidly. Broadly recognizable drivers of diversity variation include energy availability and historical refugia. The impacts of local human activities and global environmental change nonetheless pose challenges to current and future understanding of Antarctic biodiversity. Life in the Antarctic and the Southern Ocean is surprisingly rich, and as much at risk from environmental change as it is elsewhere.The past two decades have witnessed a revolution in the approaches used to document patterns in and the functional significance of the diversity of life. Knowledge of the global distributions of organisms now extends to many groups. These include terrestrial plants and animals 1 , marine taxa 2 , components of the soil biota 3 , and, increasingly, microorganisms 4 .2 Empirical and theoretical research is verifying the range of mechanisms, including energy and nutrient availability, and historical contingency, that are responsible for these patterns 1,2 , and the role of diversity in maintaining ecosystem services. New approaches are also revealing rapid changes in diversity across most ecosystems, their often negative implications for the future of the planet, and our struggle to address the problem 5 .In tandem, biodiversity research has surged across the Antarctic and Southern Ocean.In part the increasing interest has been driven by the realization that any fundamental quest to understand life's diversity requires exploration of the polar regions 6,7 . But it has also been underpinned by a growing appreciation of the particular challenges faced by Antarctic species and ecosystems. Climate change 8 , and economic activity in the form of fishing, tourism, and scientific research itself 9,10 are all having impacts on Antarctic diversity. The intricacy of Southern Ocean food webs, best known for the region's iconic seals, penguins, whales and albatrosses, has been further unveiled, so highlighting the complexity of the simultaneous impacts of changing climates, sea ice distribution and fisheries on this system 11,12 . New marine research has also exposed unexpectedly high benthic diversity, including in the deep sea 13,14 . In terrestrial areas, the diversity of higher plants and animals is relatively low (e.g., just two flowering plant species), but the diversity of lichens, bryophytes, invertebrates, and the microbiota is substantial 15 . Local and regional spatial patterning in these groups is extensive 16 , with the mechanisms underlying these patterns both recognizable from broader ecological theory and unusual in several respects.Here we explore recent advances in our understanding of the biodiversity of the Antarctic. Given the many conservation challenges it faces, we also consider how well the region i...

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“…Fraser et al (2014) suggest that the present biodiversity is linked to the presence of geothermal areas offering refugia through past more extensive glaciation periods. In contrast, Pisa et al (2014) suggest that several colonisation events have occurred for the cosmopolitan moss Bryum argenteum, and Hills et al (2010) suggest Pleistocene survival for the same species. Green et al (2011a) also suggest relict occurrence of several species in the Beardmore Glacier area, 83°S.…”

Section: Introductionmentioning

confidence: 83%

“…Torricelli et al (2010) suggest that their results confirm the likelihood of a pre-Pleistocene origin for Antarctic springtails, which must have survived the glacial periods in multiple refugia in each of the major regions where they are currently found. Mosses are suggested to have recolonised the Ross Sea region at around 3.5 Ma (Pisa et al 2014), and this follows the major glaciations of the Miocene and also the volcanic activity and formation of the region around Cape Hallett dated at 5.49 ± 0.12 and 6.6 ± 0.4 Ma (McIntosh and Kyle 1990).…”

Section: Discussionmentioning

confidence: 98%

Flora and vegetation of Cape Hallett and vicinity, northern Victoria Land, Antarctica

et al. 2015

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Cape Hallett (72°19 0 S; 170°13 0 E) lies at the northern end of the western coastline of the Ross Sea region, and, to date, there appears to be no full description of its terrestrial flora despite its probable importance in understanding links between biodiversity and latitude. Here we present information about lichens and mosses from published papers, herbarium collections and personal surveys for Cape Hallett and seven nearby sites. A total of 59 lichen and 11 moss species are reported for these eight sites. Cape Hallett is one of the richest sites for terrestrial biodiversity in the Ross Sea region with about 46 lichen species and nine species of bryophytes. Lichens have their greatest diversity on the upper scree and summit area (30 species, 330 m), the least within the large penguin colony at sea level (one species). The station at Cape Hallett was established in 1957, and some of the earliest ecological and ecophysiological studies in Antarctica were carried out there. Historical comparisons are possible and have revealed considerable changes in vegetation in the lower flush area, a high level of frost heave disturbance, new lichen growth rate estimates for northern Victoria Land and extreme stability of the snow banks on the scree slopes. Cape Hallett represents a very important site for studies on links between terrestrial flora and the environment as well as on possible effects of climate change.

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The cosmopolitan moss Bryum argenteum in Antarctica: recent colonisation or in situ survival?

Abstract: Since the onset of glaciation following the Oligocene

Cited by 59 publications

References 57 publications

Future directions and priorities for Arctic bryophyte research

Future directions and priorities for Arctic bryophyte research

The changing form of Antarctic biodiversity

Flora and vegetation of Cape Hallett and vicinity, northern Victoria Land, Antarctica

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