المستودع الأكاديمي جامعة المدينة

Microstructural Characterization of Cyanobacterial Mats from the McMurdo Ice Shelf, Antarctica

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dc.creator Ríos, Asunción de los
dc.creator Ascaso, Carmen
dc.creator Wierzchos, Jacek
dc.creator Fernández-Valiente, Eduardo
dc.creator Quesada, Antonio
dc.date 2008-02-05T08:17:11Z
dc.date 2008-02-05T08:17:11Z
dc.date 2004-01
dc.date.accessioned 2017-01-31T00:59:56Z
dc.date.available 2017-01-31T00:59:56Z
dc.identifier Appl Environ Microbiol. 2004 January; 70(1): 569–580.
dc.identifier 0099-2240
dc.identifier http://hdl.handle.net/10261/2842
dc.identifier 10.1128/AEM.70.1.569-580.2004
dc.identifier.uri http://dspace.mediu.edu.my:8181/xmlui/handle/10261/2842
dc.description The three-dimensional structures of two types of cyanobacterium-dominated microbial mats from meltwater ponds on the McMurdo Ice Shelf were as determined by using a broad suite of complementary techniques, including optical and fluorescence microscopy, confocal scanning laser microscopy, scanning electron microscopy with back-scattered electron-imaging mode, low-temperature scanning electron microscopy, and microanalyitical X-ray energy dispersive spectroscopy. By using a combination of the different in situ microscopic techniques, the Antarctic microbial mats were found to be structures with vertical stratification of groups of cyanobacteria and mineral sediments, high contents of extracellular polymeric substances, and large void spaces occupied by water. In cyanobacterium-rich layers, heterocystous nostocalean and nonheterocystous oscillatorialean taxa were the most abundant taxa and appeared to be intermixed with fine-size deposits of epicellular silica and calcium carbonate. Most of the cyanobacterial filaments had similar orientations in zones without sediment particles, but thin filaments were tangled among thicker filaments. The combination of the microscopic techniques used showed the relative positions of biological and mineral entities within the microbial mats and enabled some speculation about their interactions.
dc.description This work was supported by grants BOS2000-1121, REN2002-03542, ANT96-2174-E, ANT99-1319-E, and REN2000-0435-ANT.
dc.description Peer reviewed
dc.format 5313479 bytes
dc.format application/pdf
dc.language eng
dc.publisher American Society for Microbiology
dc.rights openAccess
dc.title Microstructural Characterization of Cyanobacterial Mats from the McMurdo Ice Shelf, Antarctica
dc.type Artículo


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