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Microbial Assemblages in Soil Microbial Succession After Glacial Retreat in Svalbard (High Arctic)
It is shown that nitrogen and water content are the main factors affecting bacterial abundance and overall soil respiration, and of the studied habitats cryoconite sediments are the most suitable ones for the development of microbial assemblages. Expand
Prokaryotic diversity in sediments beneath two polar glaciers with contrasting organic carbon substrates
The identified clones were related to bacteria with both aerobic and anaerobic metabolisms, indicating the presence of both oxic and anoxic conditions in the sediments. Expand
Photophysiology and albedo-changing potential of the ice algal community on the surface of the Greenland ice sheet
It is shown that heavily pigmented, actively photosynthesising microalgae and cyanobacteria are present on the bare ice, and the widespread abundance of green algae in the Zygnematophyceae on the ice sheet surface in Southwest Greenland. Expand
Microbial Communities on Glacier Surfaces in Svalbard: Impact of Physical and Chemical Properties on Abundance and Structure of Cyanobacteria and Algae
Analysis of microbial communities occurring in three types of supraglacial habitats at several glaciers in the Arctic archipelago of Svalbard suggests that fine sediment with higher water content is the most suitable condition for bacteria, cyanobacteria, and algae. Expand
Biological processes on glacier and ice sheet surfaces
Glacial ice covers around 10% of the Earth's continents. A review of the literature suggests that microbes living on glaciers and ice sheets are an integral part of both the glacial environment andExpand
Microbial primary production on an Arctic glacier is insignificant in comparison with allochthonous organic carbon input.
Although glacier surfaces can be a significant source of organic carbon for glacial environments on Svalbard, they may be reservoirs rather than oases of high productivity because of the great disparity between annual primary production and organic carbon content. Expand
Potential methane reservoirs beneath Antarctica
The results demonstrate the potential for methane hydrate accumulation in Antarctic sedimentary basins, where the total inventory depends on rates of organic carbon degradation and conditions at the ice-sheet bed, and calculate that the sub-Antarctic hydrate inventory could be of the same order of magnitude as that of recent estimates made for Arctic permafrost. Expand
Large cryoconite aggregates on a Svalbard glacier support a diverse microbial community including ammonia-oxidizing archaea
This work investigates the microbial community on the surface of Aldegondabreen, a valley glacier in Svalbard which is supplied with carbon and nutrients from different sources across its surface, including colonies of seabirds, and shows that a diverse microbial community is present, dominated by cyanobacteria, Proteob bacteria, Bacteroidetes, and Actinobacteria that are well-known in supraglacial environments. Expand
Greenland Ice Sheet exports labile organic carbon to the Arctic oceans
Runoff from small glacier systems contains dissolved organic carbon (DOC) rich in protein-like, low molecular weight (LMW) compounds, designating glaciers as an important source of bioavailableExpand