Evidence of form II RubisCO (cbbM) in a perennially ice-covered Antarctic lake
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چکیده
منابع مشابه
Evidence of form II RubisCO (cbbM) in a perennially ice-covered Antarctic lake.
The permanently ice-covered lakes of the McMurdo Dry Valleys, Antarctica, harbor microbially dominated food webs. These organisms are adapted to a variety of unusual environmental extremes, including low temperature, low light, and permanently stratified water columns with strong chemo- and oxy-clines. Owing to the low light levels during summer caused by thick ice cover as well as 6 months of ...
متن کاملOxygen budget of a perennially ice-covered Antarctic lake.
A bulk O2 budget for Lake Hoare, Antarctica, is presented. Five years of seasonal data show the lake to be persistently supersaturated with O2. Oxygen is carried into the lake in glacial meltstreams and is left behind when this water is removed as ice by ablation and sublimation. A diffusive loss of O2 from the lake through the summer moat is suggested. Measured values of the total O2 in the...
متن کاملDiversity and expression of RubisCO genes in a perennially ice-covered Antarctic lake during the polar night transition.
The autotrophic communities in the lakes of the McMurdo Dry Valleys, Antarctica, have generated interest since the early 1960s owing to low light transmission through the permanent ice covers, a strongly bimodal seasonal light cycle, constant cold water temperatures, and geographical isolation. Previous work has shown that autotrophic carbon fixation in these lakes provides an important source ...
متن کاملMicroplankton dynamics in a perennially ice-covered Antarctic lake – Lake Hoare
1. Temporal and spatial variation in planktonic abundance, biomass and composition were determined in Lake Hoare (McMurdo Dry Valleys, Antarctica) over two summer seasons (1996–97 and 1997–98). 2. Phototrophic nanoflagellates (PNAN) dominated planktonic biomass, with a mean monthly biomass ranging between 27.3 and 40.4 lg C L. The deep chlorophyll maximum was mainly composed of cryptophytes (>8...
متن کاملSupersaturated N2O in a perennially ice-covered Antarctic lake: Molecular and stable isotopic evidence for a biogeochemical relict
The east lobe of Lake Bonney, a permanently ice-covered lake in the McMurdo Dry Valleys, Antarctica, has a mid-depth maximum N2O concentration of 43.3 mmol N L21 (.700,000% saturation with respect to air), representing one of the highest concentrations reported for a natural aquatic system. d15N and d18O measurements indicate that this is the most isotopically depleted N2O yet observed in a nat...
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ژورنال
عنوان ژورنال: FEMS Microbiology Ecology
سال: 2012
ISSN: 0168-6496
DOI: 10.1111/j.1574-6941.2012.01431.x