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dc.contributor.authorForeman, Christine M.
dc.contributor.authorDieser, Markus
dc.contributor.authorGreenwood, Mark C.
dc.contributor.authorCory, R. M.
dc.contributor.authorLaybourn-Parry, Johanna
dc.contributor.authorLisle, John T.
dc.contributor.authorJaros, C.
dc.contributor.authorMiller, P. L.
dc.contributor.authorChin, Yu-Ping
dc.contributor.authorMcKnight, Diane M.
dc.identifier.citationForeman CM, Dieser M, Greenwood M, Cory RM, Laybourn-Parry J, Lisle JT, Jaros C, Miller PL, Chin YP, McKnight DM, "When a habitat freezes solid: Microorganisms over-winter within the ice column of a coastal Antarctic lake," FEMS Microbiology Ecology, 2011 76(3) 401-412en_US
dc.description.abstractA major impediment to understanding the biology of microorganisms inhabiting Antarctic environments is the logistical constraint of conducting field work primarily during the summer season. However, organisms that persist throughout the year encounter severe environmental changes between seasons. In an attempt to bridge this gap, we collected ice core samples from Pony Lake in early November 2004 when the lake was frozen solid to its base, providing an archive for the biological and chemical processes that occurred during winter freezeup. The ice contained bacteria and virus-like particles, while flagellated algae and ciliates over-wintered in the form of inactive cysts and spores. Both bacteria and algae were metabolically active in the ice core melt water. Bacterial production ranged from 1.8 to 37.9 μg C L−1 day−1. Upon encountering favorable growth conditions in the melt water, primary production ranged from 51 to 931 μg C L−1 day−1. Because of the strong H2S odor and the presence of closely related anaerobic organisms assigned to Pony Lake bacterial 16S rRNA gene clones, we hypothesize that the microbial assemblage was strongly affected by oxygen gradients, which ultimately restricted the majority of phylotypes to distinct strata within the ice column. This study provides evidence that the microbial community over-winters in the ice column of Pony Lake and returns to a highly active metabolic state when spring melt is initiated.en_US
dc.titleWhen a habitat freezes solid: Microorganisms over-winter within the ice column of a coastal Antarctic lakeen_US
mus.citation.journaltitleFEMS Microbiology Ecologyen_US
mus.identifier.categoryChemical & Material Sciencesen_US
mus.identifier.categoryEngineering & Computer Scienceen_US
mus.identifier.categoryLife Sciences & Earth Sciencesen_US
mus.relation.collegeCollege of Agricultureen_US
mus.relation.collegeCollege of Engineeringen_US
mus.relation.collegeCollege of Letters & Scienceen_US
mus.relation.departmentCenter for Biofilm Engineering.en_US
mus.relation.departmentChemical & Biological Engineering.en_US
mus.relation.departmentChemical Engineering.en_US
mus.relation.departmentChemistry & Biochemistry.en_US
mus.relation.departmentEnvironmental Engineering.en_US
mus.relation.departmentLand Resources & Environmental Sciences.en_US
mus.relation.departmentMicrobiology & Immunology.en_US
mus.relation.universityMontana State University - Bozemanen_US
mus.relation.researchgroupCenter for Biofilm Engineering.en_US
mus.contributor.orcidForeman, Christine M.|0000-0003-0230-4692en_US

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