Microbial community structure and ecology of subglacial sediments in two polythermal Svalbard glaciers characterized by epifluorescence microscopy and PLFA

Kaštovská, Klára; Stibal, Marek; Šabacká, Marie; Černá, Barbora; Šantrůčková, Hana; Elster, Josef

doi:10.1007/s00300-006-0181-y

Cited by 99 publications

(60 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previously, we found at least seven bacterial phyla in Svalbard cryoconite, and associations between community structure and activity with glacier dynamics (Edwards et al 2011). Others (Kastovska et al 2007;Mindl et al 2007) have implied the transfer of taxa between ice-marginal and cryoconite habitats, but the relative importance of regional and local processes in shaping the cryoconite community are poorly quantified.…”

mentioning

confidence: 90%

Contrasts between the cryoconite and ice-marginal bacterial communities of Svalbard glaciers

et al. 2013

View full text Add to dashboard Cite

Cryoconite holes are foci of unusually high microbial diversity and activity on glacier surfaces worldwide, comprising melt-holes formed by the darkening of ice by biogenic granular debris. Despite recent studies linking cryoconite microbial community structure to the functionality of cryoconite habitats, little is known of the processes shaping the cryoconite bacterial community. In particular, the assertions that the community is strongly influenced by aeolian transfer of biota from ice-marginal habitats and the potential for cryoconite microbes to inoculate proglacial habitats are poorly quantified despite their longevity in the literature. Therefore, the bacterial community structures of cryoconite holes on three High-Arctic glaciers were compared to bacterial communities in adjacent moraines and tundra using terminal-restriction fragment length polymorphism. Distinct community structures for cryoconite and ice-marginal communities were observed. Only a minority of phylotypes are present in both habitat types, implying that cryoconite habitats comprise distinctive niches for bacterial taxa when compared to ice-marginal habitats. Curiously, phylotype abundance distributions for both cryoconite and ice-marginal sites best fit models relating to succession. Our analyses demonstrate clearly that cryoconites have their own, distinct functional microbial communities despite significant inputs of cells from other habitats

show abstract

mentioning

confidence: 90%

Contrasts between the cryoconite and ice-marginal bacterial communities of Svalbard glaciers

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Measurements of allochthonous C deposition range from 7.5 kg C ha −1 a −1 at the Damma Glacier (Brankatschk et al, 2011) to 34 kg C ha −1 a −1 at Toolik Lake, Alaska (Fahnestock et al, 1998). Second, C inputs from close-by cyanobacterial and algal communities, such as cryoconite holes or patches of snow algae, might contribute C to the forefield (Kaštovská et al, 2007;Sawstrom et al, 2002;Stibal et al, 2008). Third, ancient C might be present in the forefield of the Damma Glacier.…”

Section: Development Of Initial C and N Cyclesmentioning

confidence: 99%

The role of microorganisms at different stages of ecosystem development for soil formation

et al. 2013

View full text Add to dashboard Cite

Soil formation is the result of a complex network of biological as well as chemical and physical processes. The role of soil microbes is of high interest, since they are responsible for most biological transformations and drive the development of stable and labile pools of carbon (C), nitrogen (N) and other nutrients, which facilitate the subsequent establishment of plant communities. Forefields of receding glaciers provide unique chronosequences of different soil development stages and are ideal ecosystems to study the interaction of bacteria, fungi and archaea with their abiotic environment. In this review we give insights into the role of microbes for soil development. The results presented are based on studies performed within the Collaborative Research Program DFG SFB/TRR 38 (http://www.tu-cottbus.de/ecosystem ) and are supplemented by data from other studies. The review focusses on the microbiology of major steps of soil formation. Special attention is given to the development of nutrient cycles on the formation of biological soil crusts (BSCs) and on the establishment of plant–microbe interactions

show abstract

“…For several years we have studied the algal ecology from various aero-terrestrial, terrestrial, and hydro-terrestrial habitats in the Arctic (Ellesmere Island: Elster & Svoboda 1996;Elster et al 1997, Svalbard: Kubečková et al. 2001; Kaštovská et al 2005Kaštovská et al , 2007, the Antarctic (King George Island) and Central Europe (Slovakia: Uher et al 2004Uher et al , 2005Uher et al , 2006. In this study, unialgal Klebsormidium strains were subjected (in their natural conditions) to extremes of water availability gradients, and to rapid fluctuations across these extremes.…”

Section: Introductionmentioning

confidence: 99%

Freezing and desiccation injury resistance in the filamentous green alga Klebsormidium from the Antarctic, Arctic and Slovakia

et al. 2008

Self Cite

View full text Add to dashboard Cite

Abstract:The freezing and desiccation tolerance of 12 Klebsormidium strains, isolated from various habitats (aeroterrestrial, terrestrial, and hydro-terrestrial) from distinct geographical regions (Antarctic -South Shetlands, King George Island, Arctic -Ellesmere Island, Svalbard, Central Europe -Slovakia) were studied. Each strain was exposed to several freezing (−4 C. It appears that species of Klebsormidium which occupy an environment where both seasonal and diurnal variations of water availability prevail, are well adapted to freezing and desiccation injuries. Freezing and desiccation tolerance is not species-specific nor is the resilience only found in polar strains as it is also a feature of temperate strains.

show abstract

Microbial community structure and ecology of subglacial sediments in two polythermal Svalbard glaciers characterized by epifluorescence microscopy and PLFA

Cited by 99 publications

References 34 publications

Contrasts between the cryoconite and ice-marginal bacterial communities of Svalbard glaciers

Contrasts between the cryoconite and ice-marginal bacterial communities of Svalbard glaciers

The role of microorganisms at different stages of ecosystem development for soil formation

Freezing and desiccation injury resistance in the filamentous green alga Klebsormidium from the Antarctic, Arctic and Slovakia

Contact Info

Product

Resources

About