Non-structural carbohydrates in Deschampsia Antarctica desv. from South Shetland Islands, maritime antarctic

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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Genome Sequence of Pseudomonas sp. Strain LAP_36, A Rhizosphere Bacterium Isolated from King George Island, Antarctica

Microbiology Resource Announcements ◽

10.1128/mra.00731-21 ◽

2021 ◽

Vol 10 (48) ◽

Author(s):

Sarah Mederos da Silveira ◽

Sheila da Silva ◽

Andrew Macrae ◽

Rommel T. J. Ramos ◽

Fabrício A. Araújo ◽

...

Keyword(s):

Genome Sequence ◽

Draft Genome ◽

Gc Content ◽

South Shetland Islands ◽

Deschampsia Antarctica ◽

King George Island ◽

Protein Coding ◽

Content Type ◽

Shetland Islands ◽

Rhizosphere Bacterium

Pseudomonas sp. strain LAP_36 was isolated from rhizosphere soil from Deschampsia antarctica on King George Island, South Shetland Islands, Antarctica. Here, we report on its draft genome sequence, which consists of 8,794,771 bp with 60.0% GC content and 8,011 protein-coding genes.

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Three new Hantzschia species (Bacillariophyta) from the Maritime Antarctic Region

Phytotaxa ◽

10.11646/phytotaxa.371.3.2 ◽

2018 ◽

Vol 371 (3) ◽

pp. 168 ◽

Cited By ~ 2

Author(s):

MARIE BULÍNOVÁ ◽

NATALIA KOCHMAN-KĘDZIORA ◽

KATEŘINA KOPALOVÁ ◽

BART VAN DE VIJVER

Keyword(s):

Electron Microscopy ◽

New Species ◽

Morphological Analysis ◽

South Shetland Islands ◽

Maritime Antarctic ◽

Antarctic Region ◽

Shetland Islands ◽

James Ross Island ◽

Three New Species ◽

Scanning Electron

Following an earlier revision of the genus Hantzschia (Bacillariophyta) in the Maritime Antarctic Region, several at present unidentified or poorly known taxa of this aerophilic genus have been investigated using both light and scanning electron microscopy. Based on the morphological analysis of the observations, three new species are currently described: Hantzschia australabundans sp. nov., H. zidarovae sp. nov. and H. zikmundiana sp. nov. The new species differ from comparable taxa in valve outline, structure of the internal proximal raphe endings and structure of the striae and areolae. Additional observations are presented on Hantzschia amphioxys and its forma muelleri, H. abundans and H. incognita, based on observations of Antarctic populations from the South Shetland Islands, Vega Island and James Ross Island. Brief notes on the ecology of all reported species are added.

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Ten new Bacillariophyta species from James Ross Island and the South Shetland Islands (Maritime Antarctic Region)

Phytotaxa ◽

10.11646/phytotaxa.272.1.2 ◽

2016 ◽

Vol 272 (1) ◽

pp. 37 ◽

Cited By ~ 6

Author(s):

RALITSA ZIDAROVA ◽

KATEŘINA KOPALOVÁ ◽

BART VAN DE VIJVER

Keyword(s):

New Species ◽

South Shetland Islands ◽

Similar Species ◽

Maritime Antarctic ◽

The South ◽

Antarctic Region ◽

Shetland Islands ◽

James Ross Island ◽

The Antarctic

The present paper describes 10 new diatom (Bacillariophyta) species from the Maritime Antarctic Region. Five of the newly described taxa: Caloneis australis sp. nov., Mayamaea sweetloveana sp. nov., Navicula romanedwardii sp. nov., Sellaphora antarctica sp. nov. and Sellaphora gracillima sp. nov. have been previously reported from the Antarctic Region but were force-fitted into incorrect names. Five other taxa: Chamaepinnularia elliptica sp. nov., Cosmioneis regigeorgiensis sp. nov., Mayamaea tytgatiana sp. nov., Muelleria pimpireviana sp. nov. and Pinnularia pinseeliana sp. nov. are newly discovered taxa. The morphology of all new species is studied using both light and scanning electon microscope observations and compared with similar species from the Antarctic Region and worldwide. Data about the ecology and confirmed Antarctic distribution of the new species are added.

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Distribution and reproductive capacity of Deschampsia antarctica and Colobanthus quitensis on Byers Peninsula, Livingston Island, South Shetland Islands, Antarctica

Antarctic Science ◽

10.1017/s0954102012000995 ◽

2013 ◽

Vol 25 (2) ◽

pp. 292-302 ◽

Cited By ~ 11

Author(s):

María Luisa Vera ◽

Teresa Fernández-Teruel ◽

Antonio Quesada

Keyword(s):

Seed Production ◽

Regional Climate ◽

Regional Climate Change ◽

Reproductive Capacity ◽

South Shetland Islands ◽

Deschampsia Antarctica ◽

Shetland Islands ◽

Colobanthus Quitensis ◽

Livingston Island ◽

Viable Seeds

AbstractThe Maritime Antarctic is one of the regions where regional climate change is most intense and the reproductive performance of plants may be enhanced. Reporting the distribution of Deschampsia antarctica and Colobanthus quitensis on Byers Peninsula (Livingston Island, South Shetland Islands), our results confirm that D. antarctica is more widespread than C. quitensis. Flower and seed development of both species varied between sites. Deschampsia antarctica produced more viable seeds than C. quitensis, although fully developed seeds were not found at all locations. Seed production in C. quitensis was low in comparison with other Antarctic locations. The largest cushions of Colobanthus observed in 2002 were 15 cm in diameter, suggesting that the populations may have established at least 50 years ago. Deschampsia antarctica tussocks were very often 20 cm in diameter, although turf areas up to 1.5 m across were also observed, probably due to coalesced aggregates of individuals. This study shows that, although seed production is low, the presence of seedlings and young individuals suggests an expansion process.

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King George Island — South Shetland Islands, Maritime Antarctic

Ecological Studies - Geoecology of Antarctic Ice-Free Coastal Landscapes ◽

10.1007/978-3-642-56318-8_3 ◽

2002 ◽

pp. 23-39 ◽

Cited By ~ 9

Author(s):

S. Rakusa-Suszczewski

Keyword(s):

South Shetland Islands ◽

King George Island ◽

Maritime Antarctic ◽

Shetland Islands

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Phaeosphaeria deschampsii J. Putzke & A.B.Pereira (Ascomycota, Fungi) causing whitening in Deschampsia antarctica Desv. (Poaceae) in the South Shetland Islands

Check List ◽

10.15560/17.6.1751 ◽

2021 ◽

Vol 17 (6) ◽

pp. 1751-1754

Author(s):

Antonio Batista Pereira ◽

Jorge Renato Pinheiro Velloso ◽

Jair Putzke

Keyword(s):

South Shetland Islands ◽

Deschampsia Antarctica ◽

The South ◽

Shetland Islands

Phaeosphaeria deschampsii was described from dead leaves of Deschampsia antarctica (Antarctic Grass). We surveyed other islands of the South Shetland archipelago, Antarctica, and also found Arctic Grass whitening, the disease associated with this fungus, indicating that is disease is widespread.

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Two additions to the moss flora of the South Shetland Islands in the maritime Antarctic

Acta Societatis Botanicorum Poloniae ◽

10.5586/asbp.3598 ◽

2018 ◽

Vol 87 (4) ◽

Author(s):

Mariusz Wierzgoń ◽

Tomasz Suchan ◽

Michał Ronikier

Keyword(s):

South Shetland Islands ◽

King George Island ◽

Maritime Antarctic ◽

The South ◽

Shetland Islands ◽

Bay Area ◽

Leading Position ◽

Glacial Cover ◽

The Antarctic ◽

First Time

Tortella fragilis (Drumm.) Limpr. (Pottiaceae) and Bryum nivale Müll. Hal. (Bryaceae) are recorded for the first time from the South Shetland Islands in the northern maritime Antarctic. They were discovered in the Admiralty Bay area on King George Island, the largest island of this archipelago. The two species are briefly characterized morphologically, their habitats are described, and their distribution in the Antarctic is mapped. Discovery of these species has increased the documented moss flora of King George Island to 67 species, strengthening it in the leading position among individual areas with the richest diversity of moss flora in Antarctica. Likewise, T. fragilis and B. nivale represent remarkable additions to the moss flora of the South Shetland Islands, which currently consists of 92 species and one variety, making this archipelago by far the richest bryofloristically amongst large geographic regions of the Antarctic. Comparison of recent (2018) and old (1985) photographs revealed a significant retreat of glacial cover and suggests that the collection site was likely opened for colonization only within the last several decades. The record of T. fragilis is biogeographically relevant, and constitutes an intermediate site between the species’ occurrences in the Antarctic Peninsula and southern South America. The present record of B. nivale is the fourth discovery of the species worldwide, which may be helpful for the future designation of the distribution of this extremely rare species.

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Records of Parochlus steinenii in the Maritime Antarctic and sub-Antarctic regions

ZooKeys ◽

10.3897/zookeys.1011.56833 ◽

2021 ◽

Vol 1011 ◽

pp. 63-71

Author(s):

Melisa Gañan ◽

Tamara Contador ◽

Javier Rendoll ◽

Felipe Simoes ◽

Carolina Pérez ◽

...

Keyword(s):

Biosphere Reserve ◽

South Shetland Islands ◽

Maritime Antarctic ◽

The South ◽

Global Biodiversity Information Facility ◽

Shetland Islands ◽

South Georgia ◽

Darwin Core ◽

Complete Dataset ◽

Antarctic Continent

This study provides the summary of the reports of the geographical distribution in the Maritime Antarctic and sub-Antarctic regions of Parochlus steinenii (Gercke, 1889) (Diptera, Chironomidae), the only flying insect occurring naturally in the Antarctic continent. The distribution encompasses the South Shetland Islands (Maritime Antarctic), South Georgia (sub-Antarctic), and parts of the Cape Horn Biosphere Reserve (CHBR, southern Chile). In total 78 occurrence records were identified, 53 from our own records, 19 from the literature, and six from other data present in GBIF. Of the 78 records, 66 are from the South Shetland Islands, eight are from South Georgia, and four from the CHBR. This database was developed as one of the main objectives of two Chilean-funded research projects addressing understanding the effects of climate change on sub-Antarctic and Antarctic insects. It provides dataset documenting the distribution of Parochlus steinenii in the Maritime Antarctic, the sub-Antarctic, and the CHBR in southern South America (Chile). The complete dataset is available in Darwin Core Archive format via the Global Biodiversity Information Facility (GBIF).

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Molecular identification of Trichocera maculipennis, an invasive fly species in the Maritime Antarctic

Molecular Biology Reports ◽

10.1007/s11033-020-05566-5 ◽

2020 ◽

Vol 47 (8) ◽

pp. 6379-6384

Author(s):

Marta Potocka ◽

Ewa Krzemińska ◽

Robert Gromadka ◽

Jan Gawor ◽

Joanna Kocot-Zalewska

Keyword(s):

Molecular Identification ◽

Ribosomal Rna ◽

Molecular Data ◽

Morphological Data ◽

South Shetland Islands ◽

King George Island ◽

Maritime Antarctic ◽

Shetland Islands ◽

Fragile Environment ◽

First Time

Abstract Trichocera maculipennis, an invasive Diptera, was described for the first time in Antarctica in 2006 in a sewage system of one of the scientific stations on King George Island, South Shetland Islands, and started to increase its distribution within the island. To date, only taxonomical description of this species, based on morphological data has been available, as there were no molecular data recorded. In the present study, we present two methods of molecular identification of this species—based on partial cytochrome c oxidase subunit I (COI) and 16S ribosomal RNA (16S) genes. An appropriate and easy-to-use assay for proper and fast identification of invasive species is a key requirement for further management decisions, especially in such a fragile environment as found in terrestrial Antarctica.

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