Arthropod Ecology in the Maritime Antarctic

Lichen Colonization and Recolonization of Two Recently Deglaciated Zones in the Maritime Antarctic

The Lichenologist ◽

10.1016/s0024-2829(95)80008-5 ◽

1995 ◽

Vol 27 (6) ◽

pp. 485-493 ◽

Cited By ~ 2

Author(s):

Fernando Valladares ◽

Leopoldo G. Sancho

Keyword(s):

Snow Cover ◽

South Shetland Islands ◽

Homogeneous Distribution ◽

Maritime Antarctic ◽

Vegetation Development ◽

Lichen Cover ◽

Glacier Front ◽

Ice Retreat ◽

Snow Cover Duration ◽

Rock Size

AbstractThe stages of vegetation development close to two glacier fronts on two of the South Shetland Islands (Livingston and Robert) within the Maritime Antarctic were studied with special reference to saxicolous lichens. A lichenometric study of the crustose lichen Caloplaca sublobulata was carried out at both sites. On the moraine of Livingston Island, rock size played an important role in lichen development, explaining most of the differences observed in the diameter of C. sublobulata, the number of species, and the percentage of cover among the rocks studied. On Robert Island, the distance from the glacier front was associated with the lichen cover of the rocks but not with diameter of C. sublobulata This homogeneous distribution of C. sublobulata thallus size on the Robert Island study area points to a simultaneous recolonization of the whole zone by this lichen. The lichen development in the area studied on Robert Island seems to have been drastically affected by fluctuations in the persistence of snow cover following glacier front retreat. Tentative associations between ice retreat and colonization, on the o e hand, and changes in snow cover duration and the dynamic processes of extinction and recolonization, on the other, are suggested from comparison of the two zones.

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Functional filtering and random processes affect the assembly of microbial communities of snow algae blooms at Maritime Antarctic

The Science of The Total Environment ◽

10.1016/j.scitotenv.2021.150305 ◽

2021 ◽

pp. 150305

Author(s):

Daniela F. Soto ◽

Andrea Franzetti ◽

Iván Gómez ◽

Pirjo Huovinen

Keyword(s):

Microbial Communities ◽

Random Processes ◽

Maritime Antarctic ◽

Snow Algae ◽

Algae Blooms

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Distribution of alkane-degrading bacterial communities in soils from King George Island, Maritime Antarctic

European Journal of Soil Biology ◽

10.1016/j.ejsobi.2012.03.006 ◽

2012 ◽

Vol 51 ◽

pp. 37-44 ◽

Cited By ~ 23

Author(s):

Diogo Jurelevicius ◽

Simone Raposo Cotta ◽

Raquel Peixoto ◽

Alexandre Soares Rosado ◽

Lucy Seldin

Keyword(s):

Bacterial Communities ◽

King George Island ◽

Maritime Antarctic

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Chemical weathering and solute export by meltwater in a maritime Antarctic glacier basin

Biogeochemistry ◽

10.1007/s10533-009-9372-2 ◽

2009 ◽

Vol 98 (1-3) ◽

pp. 9-27 ◽

Cited By ~ 32

Author(s):

Andy Hodson ◽

Tim Heaton ◽

Harry Langford ◽

Kevin Newsham

Keyword(s):

Chemical Weathering ◽

Maritime Antarctic

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Periphyton diversity in two different Antarctic lakes assessed using metabarcoding

Antarctic Science ◽

10.1017/s0954102021000316 ◽

2021 ◽

pp. 1-9

Author(s):

Paulo E.A.S. Câmara ◽

Láuren M.D. De Souza ◽

Otávio Henrique Bezerra Pinto ◽

Peter Convey ◽

Eduardo T. Amorim ◽

...

Keyword(s):

Dna Sequences ◽

High Throughput Sequencing ◽

Shannon Index ◽

South Shetland Islands ◽

King George Island ◽

Deception Island ◽

Maritime Antarctic ◽

Shetland Islands ◽

Antarctic Lakes ◽

Significant Difference

Abstract Antarctic lakes have generally simple periphyton communities when compared with those of lower latitudes. To date, assessment of microbial diversity in Antarctica has relied heavily on traditional direct observation and cultivation methods. In this study, sterilized cotton baits were left submerged for two years in two lakes on King George Island and Deception Island, South Shetland Islands (Maritime Antarctic), followed by assessment of diversity by metabarcoding using high-throughput sequencing. DNA sequences of 44 taxa belonging to four kingdoms and seven phyla were found. Thirty-six taxa were detected in Hennequin Lake on King George Island and 20 taxa were detected in Soto Lake on Deception Island. However, no significant difference in species composition was detected between the two assemblages (Shannon index). Our data suggest that metabarcoding provides a suitable method for the assessment of periphyton biodiversity in oligotrophic Antarctic lakes.

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