Microbial Mineralization in Soils and Plant Material from Antarctica

The process of microbial mineralization was analyzed in soil samples and plant material, mainly lichens, from the maritime and continental Antarctic (King George Island and Wilkes Land, resp.) to examine effects of temperature and moisture. Three methods were used: total C02-evolution and biological...

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Bibliographic Details
Main Author: Boelter, Manfred
Other Authors: KIEL UNIV (GERMANY F R)
Format: Text
Language:English
Published: 1992
Subjects:
Geography
Microbiology
Geology
Geochemistry and Mineralogy
*BIOCHEMICAL OXYGEN DEMAND
*GLUCOSE
*LICHENS
*MINERALIZATION
*ORGANIC MATERIALS
*SOILS
*ANTARCTIC REGIONS
*PLANTS(BOTANY)
COMPARISON
INDICATORS
ISLANDS
MATERIALS
MICROORGANISMS
MODELS
MOISTURE
OXYGEN
POPULATION
QUALITY
TEMPERATURE
SYMPOSIA
CARBON DIOXIDE
METABOLISM
ADAPTIVE SYSTEMS
Component Reports
*Microbial populations
Antarctic
Fairbanks
King George Island
Wilkes Land
Antarc*
Antarctica
Alaska
Online Access:http://www.dtic.mil/docs/citations/ADP007319
http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007319
Description
Summary:The process of microbial mineralization was analyzed in soil samples and plant material, mainly lichens, from the maritime and continental Antarctic (King George Island and Wilkes Land, resp.) to examine effects of temperature and moisture. Three methods were used: total C02-evolution and biological oxygen demand as a measure of general metabolic activity, and remineralization of 14C-labeled glucose (which may serve as a model for dissolved organic matter) as a measure of the activity of heterotrophic microorganisms. These methods are used as indicators for different fractions of organic material and microbial populations. A comparison of the results of these methods showed that the portion of respired material from 14C-labeled glucose may even outcompete the totally metabolized material. These data differ with respect to the parent material and thus give an indication of its quality and the actual activity of the bacterial population which is considered to be mainly responsible for the turnover and mineralization of dissolved organic matter. This article is from 'Proceedings of the International Conference on the Role of the Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 990. Volume 2', AD-A253 028, p418-422. See also Volume 1, AD-A253 027.

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