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Hyunmin, Koo Bailey M., Strope Eddy H., Kim Adel M., Shabani Ranjit, Kumar Michael R., Crowley Dale Andersen Asim K., Bej
Published in
Genome Announcements
Janthinobacterium sp. Ant5-2-1, isolated from the Schirmacher Oasis of East Antarctica, produces a purple-violet pigment, manifests diverse energy metabolism abilities, and tolerates cold, ultraviolet radiation, and other environmental stressors. We report here the 6.19-Mb draft genome of strain Ant5-2-1, which will help understand its survival mec...
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L, Zhang A D, Jungblut I, Hawes Dale Andersen D Y, Sumner T J, Mackey
Published in
Polar Biology
Perennially ice-covered, meromictic lakes in the McMurdo Dry Valleys, Antarctica, are useful models to study the relationship between cyanobacterial and environmental variables. They have rich benthic cyanobacterial mat accumulations and stable stratification of physical and chemical conditions. Here, we evaluated cyanobacteria from benthic mats fr...
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T J, Mackey D Y, Sumner I, Hawes A D, Jungblut Dale Andersen
Published in
Geobiology
Modern decimeter-scale columnar stromatolites from Lake Joyce, Antarctica, show a change in branching pattern during a period of lake level rise. Branching patterns correspond to a change in cyanobacterial community composition as preserved in authigenic calcite crystals. The transition in stromatolite morphology is preserved by mineralized layers ...
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Hcb, Steel C P, Mckay Dale Andersen
Published in
Limnology & Oceanography Fluids & Environments
Lake Untersee, Antarctica, is a freshwater perennially ice covered lake bounded along its north by the Anuchin glacier. The Massachusetts Institute of Technology general circulation model, used on a representative wedge-shaped lake and actual bathymetry for Lake Untersee, produces estimates for circulation and long-term temperature and mixing trend...
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Dale Andersen J, Tyler Megan, Krusor Kate, Wall Dawn Y, Sumner Ian, Hawes Anne, Jungblut
Published in
2014 GSA Annual Meeting in Vancouver, British Columbia
Microbial mats are abundant in Antarctic lakes Joyce, Fryxell, Vanda, and Hoare (McMurdo Dry Valleys) and Lake Untersee (Queen Maud Land). During the summer, sufficient light penetrates the ice covers of these lakes to allow photosynthetic biomass accumulation. A paucity of macroscopic metazoans allows these ecosystems to develop much like Precambr...
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H., Koo T., Ptacek M., Crowley A. K., Swain J. D., Osborne A. K., Bej Dale Andersen
Published in
Genome Announcements
Hymenobacter sp. IS2118, isolated from a freshwater lake in Schirmacher Oasis, Antarctica, produces extracellular polymeric substance (EPS) and manifests tolerance to cold, UV radiation (UVR), and oxidative stress. We report the 5.26-Mb draft genome of strain IS2118, which will help us to understand its adaptation and survival mechanisms in Antarct...
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A L, Mulyukin E V, Demkina N A, Manucharova V N, Akimov Dale Andersen C, Mckay V F, Gal Chenko
Published in
Microbiology
The heterotrophic mesophilic microbial component was studied in microbial communities of the samples of frozen regolith collected from the glacier near Lake Untersee collected in 2011 during the joint Russian-American expedition to central Dronning Maud Land (Eastern Antarctica). Cultural techniques revealed high bacterial numbers in the samples. F...
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Tomislav, Karanovic John A.E., Gibson Ian, Hawes Dale Andersen Mark I., Stevens
Published in
Antarctic Science
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J L, Heldmann W, Pollard C P, Mckay M M, Marinova Alfonso Davila K E, Williams D, Lacelle Dale Andersen
Published in
Planetary and Space Science
The high elevation valleys of the McMurdo Dry Valleys of Antarctica are the only locations on Earth known to contain dry permafrost. The Dry Valleys are a hyper-arid polar desert environment and above 1500 m elevation, air temperatures do not exceed 0 C and thus, similarly to Mars, liquid water is largely absent and instead the hydrologic cycle is ...
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S N, Filippova N A, Surgucheva E E, Kulikov V V, Sorokin V N, Akimov A K, Bej C, Mckay Dale Andersen V F, Galchenko
Published in
Microbiology
FILIPPOVA et al. absence of oxygen at a depth of 80–90 m, the concen tration of dissolved methane reaches 21 mM [10]. The high pH of this mixed water mass (pH 10.2–6.9) has been attributed to weathering of the predominant anorthosite rock in the lake s hollow [11, 12]. The benthic environment is dominated by cyanobacterial mats forming cuspate pinn...
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Nazia, Mojib Amin, Farhoomand Dale Andersen Asim K, Bej
Published in
Extremophiles
In this paper, we describe the UV and cold tolerance of a purple violet pigment (PVP)-producing Antarctic bacterium, Janthinobacterium sp. Ant5-2 (PVP+) and compared its physiological adaptations with a pigmentless mutant strain (PVP−). A spontaneous deletion of vioA that codes for tryptophan monooxygenase, the first gene involved in the biosynthes...
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I, Hawes D, Sumner Dale Andersen A, Jungblut T, Mackey
Published in
Biology Direct
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N, Mojib A, Farhoomand Dale Andersen A, Bej
Published in
Extremophiles
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M M, Marinova C P, Mckay W H, Pollard J L, Heldmann Alfonso Davila Dale Andersen W A, Jackson D, Lacelle G, Paulsen K, Zacny
...
Published in
Antarctic Science FirstView
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J, Huang N, Mojib R, Goli S, Watkins K, Waites R, Ravindra Dale Andersen A, Bej
Published in
Natural Products and Bioprospecting
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J L, Heldmann M, Marinova K E, Williams D, Lacelle C P, Mckay Alfonso Davila W, Pollard Dale Andersen
Published in
Antarctic Science
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Tyler J, Mackey Dawn Y, Sumner Ian, Hawes Dale Andersen
Published in
2011 GSA Annual Meeting in Minneapolis
Microbial mats dominated by cyanobacteria in perennially ice-covered Lake Joyce, McMurdo Dry Valleys, Antarctica, form columnar stromatolites analogous to Neoproterozoic jacutophyton. Eleven intact columnar stromatolites from 20-22m depth were sampled, frozen, and imaged with x-ray computed tomography (CT). CT scans and subsequent dissection demons...
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Nazia, Mojib Dale Andersen Asim K., Bej
Published in
FEMS Microbiology Letters
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Dale Andersen Dawn Y, Sumner Ian, Hawes Jenny, Webster‐brown Christopher P, Mckay
Published in
Geobiology
Lake Untersee is one of the largest (11.4 km 2) and deepest (> 160 m) freshwater lakes in East Antarctica. Located at 71 S the lake has a perennial ice cover, a water column that, with the exception of a small anoxic basin in the southwest of the lake, is well mixed, supersaturated with dissolved oxygen, alkaline (pH 10.4) and exceedingly clear. Th...
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D, Lacelle Alfonso Davila W, Pollard Dale Andersen J, Heldmann M, Marinova C, Mckay
Published in
Earth and Planetary Science Letters
