[Parameters: Topic='BIOSPHERE', Term='ECOLOGICAL DYNAMICS', Variable_Level_1='ECOSYSTEM FUNCTIONS', Variable_Level_2='PHOTOSYNTHESIS']
Natural spatial subsidies in continental Antarctic soilEntry ID: K052_2001_2005_NZ_1
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Abstract: The soils of the McMurdo Dry Valleys are hypothesized to rely on external sources of nutrients (carbon, nitrogen, etc). The importance of these spatial subsidies on productivity and biological diversity of dry valley soils was investigated over several seasons in the Garwood Valley. Sampling of the soil, microbial mats and foam from each identified landform and from Lake Colleen was undertaken for ... analysis of a variety of soil biological and chemical properties in order to gain an idea of the general spatial variation of these properties (before experimental work) and to determine the size of the soil microbial communities, the rates of microbial respiration and the abundance of selected invertebrate groups. Soil samples were collected and analysed to quantify carbon and nitrogen pools, potential decomposition and nitrogen release under optimal conditions and potential microbial use of a variety of test C and N substrates. The importance of spatial subsidy materials on the four different landforms was tested with the addition of lakeshore foam and algal mats at two levels of application, plus appropriate treatment controls. Pre-treatment soil samples were taken for a variety of chemical analysis to establish baseline parameters. After subsidy applications, field measurements were made of the short -term changes (over the first six days after treatment application) in in-situ microbial activity and the composition of gases being released into the atmosphere. After six days, a second set of soil samples were collected for post treatment measurements of soil community composition and diversity, potential microbial activity and decomposer processes. Soil samples were again taken 2 years later for medium term respiratory processes but also for laboratory controlled replicate experiment for in-situ confirmation of initial nitrogen limitation and later carbon limitation. Studies were in the 01/02, 02/03 and 04/05 seasons in the Garwood Valley.
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AGRICULTURE > SOILS > CARBON
AGRICULTURE > SOILS > DENITRIFICATION RATE
AGRICULTURE > SOILS > NITROGEN
AGRICULTURE > SOILS > ORGANIC MATTER
AGRICULTURE > SOILS > SOIL FERTILITY
AGRICULTURE > SOILS > SOIL GAS/AIR
AGRICULTURE > SOILS > SOIL MOISTURE/WATER CONTENT
AGRICULTURE > SOILS > SOIL RESPIRATION
AGRICULTURE > SOILS > SOIL TEMPERATURE
AGRICULTURE > SOILS > MICROFLORA
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > BIODIVERSITY FUNCTIONS
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOGEOCHEMICAL CYCLES
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > NUTRIENT CYCLING
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PHOTOSYNTHESIS
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > DECOMPOSITION
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > BIOMASS DYNAMICS
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > PRIMARY PRODUCTION
BIOSPHERE > ECOLOGICAL DYNAMICS > ECOSYSTEM FUNCTIONS > RESPIRATION RATE
BIOSPHERE > ECOLOGICAL DYNAMICS > COMMUNITY DYNAMICS > COMMUNITY STRUCTURE
ISO Topic Category
Quality Collection and Pre-treatment (dialysis, centrifugation) of muscle, heart and liver tissues from Antarctic fishes.
Data Set Progress
Email: bruno.giardina at icrm.cnr.it
L.go F. Vito, 1
Postal Code: 00168
Hemoglobin function under extreme life conditions.
M.E. Clementi, S.G. Condò, M. Castagnola and B. Giardina
Eur. J. Biochem. 223, 309-317, 1994.
Human erythrocyte metabolism is modulated by the oxygen-linked transition of hemoglobin.
I.Messana, M. Orlando, L. Cassiano, L. Pennacchietti, C. Zuppi, M. Castagnola, B. Giardina
Febs Letters 390, 25-28, 1996.
Red cell Physiology.
D. ... Bossi and B. Giardina
In 'Erythrocyte Pathophysiology', Molecular aspects of Medicine, Pergamon Press, D. Bossi Ed., 1996.
Coenzyme Q homologs and trace elements content of antarctic fishes Chionodraco hamatus and Pagothenia bernacchii compared with the mediterranean fish Mugil cephalus.
B. giardina, M.L. Gozzo, B. Zappacosta, L. Colacicco, C. Callà, A. Mordente, S. Lippa
Comp. Biochem. Physiol. 118A, 977-980, 1997.
The oxidative metabolism of Antarctic fish: some peculiar aspects of cold adaptations.
B. Giardina, A. Mordente, B. Zappacosta, C. Callà, L. Colacicco, M.L. Gozzo, S. Lippa
In Fishes of Antarctica. A biological overview, G. di Prisco, A. Clarke, E. Pisano (Eds),
Springer-Verlag Publishers, 1998.
Molecular Aspects of Temperature Adaptation.
G. di Prisco and B. Giardina
In 'Hemoglobin Function in Vertebrates', Springer-Verlag, G. di Prisco, B. Giardina and R.E.Weber Eds, 2000
Creation and Review Dates
DIF Creation Date: 2008-04-29
Last DIF Revision Date: 2008-04-30