Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Microbial Phototrophic, Heterotrophic, and Diazotrophic Activities Associated with Aggregates in the Permanent Ice Cover of Lake Bonney, Antarctica

Microbial Phototrophic, Heterotrophic, and Diazotrophic Activities Associated with Aggregates in... MICROBIAL ECOLOGY Microb Ecol (1998) 36:221–230 © 1998 Springer-Verlag New York Inc. Microbial Phototrophic, Heterotrophic, and Diazotrophic Activities Associated with Aggregates in the Permanent Ice Cover of Lake Bonney, Antarctica 1 2 H.W. Paerl, J.C. Priscu Institute of Marine Sciences, University of North Carolina at Chapel Hill, 3431 Arendell Street, Morehead City, NC 28557, USA Department of Biology, Montana State University, Bozeman, MT 59717, USA Received: 20 January 1998; Accepted: 2 April 1998 A BSTRACT The McMurdo Dry Valley lakes, Antarctica, one of the Earth’s southernmost ecosystems containing liquid water, harbor some of the most environmentally extreme (cold, nutrient-deprived) condi- tions on the planet. Lake Bonney has a permanent ice cover that supports a unique microbial habitat, provided by soil particles blown onto the lake surface from the surrounding, ice-free valley floor. During continuous sunlight summers (Nov.–Feb.), the dark soil particles are heated by solar radiation and melt their way into the ice matrix. Layers and patches of aggregates and liquid water are formed. Aggregates contain a complex cyanobacterial–bacterial community, concurrently con- ducting photosynthesis (CO fixation), nitrogen (N ) fixation, decomposition, and biogeochemical 2 2 zonation needed to complete essential nutrient cycles. Aggregate-associated CO - and N -fixation 2 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Microbial Ecology Springer Journals

Microbial Phototrophic, Heterotrophic, and Diazotrophic Activities Associated with Aggregates in the Permanent Ice Cover of Lake Bonney, Antarctica

Microbial Ecology , Volume 36 (4) – Nov 1, 1998

Loading next page...
 
/lp/springer-journals/microbial-phototrophic-heterotrophic-and-diazotrophic-activities-GjrktUCJDT

References (21)

Publisher
Springer Journals
Copyright
Copyright © Inc. by 1998 Springer-Verlag New York
Subject
Life Sciences; Microbiology; Ecology; Microbial Ecology; Geoecology/Natural Processes; Nature Conservation; Water Quality/Water Pollution
ISSN
0095-3628
eISSN
1432-184X
DOI
10.1007/s002489900109
Publisher site
See Article on Publisher Site

Abstract

MICROBIAL ECOLOGY Microb Ecol (1998) 36:221–230 © 1998 Springer-Verlag New York Inc. Microbial Phototrophic, Heterotrophic, and Diazotrophic Activities Associated with Aggregates in the Permanent Ice Cover of Lake Bonney, Antarctica 1 2 H.W. Paerl, J.C. Priscu Institute of Marine Sciences, University of North Carolina at Chapel Hill, 3431 Arendell Street, Morehead City, NC 28557, USA Department of Biology, Montana State University, Bozeman, MT 59717, USA Received: 20 January 1998; Accepted: 2 April 1998 A BSTRACT The McMurdo Dry Valley lakes, Antarctica, one of the Earth’s southernmost ecosystems containing liquid water, harbor some of the most environmentally extreme (cold, nutrient-deprived) condi- tions on the planet. Lake Bonney has a permanent ice cover that supports a unique microbial habitat, provided by soil particles blown onto the lake surface from the surrounding, ice-free valley floor. During continuous sunlight summers (Nov.–Feb.), the dark soil particles are heated by solar radiation and melt their way into the ice matrix. Layers and patches of aggregates and liquid water are formed. Aggregates contain a complex cyanobacterial–bacterial community, concurrently con- ducting photosynthesis (CO fixation), nitrogen (N ) fixation, decomposition, and biogeochemical 2 2 zonation needed to complete essential nutrient cycles. Aggregate-associated CO - and N -fixation 2

Journal

Microbial EcologySpringer Journals

Published: Nov 1, 1998

There are no references for this article.