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Chemical analyses of soil samples collected from Signy, South Orkney Islands, 2005-2008

To identify and quantify soil N species over a full growth season, small volumes of soil were removed from each sampling site 5 times during the field season and extracted in the laboratory. Bare soil at higher elevations, namely Observation Bluff, Factory Bluffs, Jane Col and lower parts of Spindrift Col; Soils from below mosses on the Backslope and on Moss Braes. Soils from below higher plant species at Bernsten Point, Factory Bluffs, Moss Braes and North Point. Orthinogenic soils from around penguin colonies at Gourlay Peninsula, Spindrift Rocks and North Point and disturbed soil from around Signy Base were collected. At the same time, soil pore water was extracted using Rhizon soil water samplers.

DON (Dissolved organic Nitrogen) and Microbial biomass measurements were made by standard CHCl3 fumigation-extraction techniques. Turnover of DON in the soil was determined by the addition of 14C-labelled plant protein (purified from 14C-labelled algal cells) or 14C-labelled glucose to the soil at a range of concentrations, and their turnover (soil label depletion in combination with NH4 +, NO3-and 14CO2 production) was determined. Gross rates of N mineralization and nitrification were determined using 15N isotope dilution methodology. Laboratory analysis of N speciation and quantification, 14C uptake and respiration, 13C PLFA signatures and 15N analysis was done. Amino acid turnover times have been determined using 14C labelled amino acids. For the final stage of the project a mathematical model to describe plant-soil-microbial N fluxes in Antarctic soils was constructed.

Simple

Alternate title
Polar Data Centre (PDC) record GB/NERC/BAS/PDC/00602
Date (Publication)
2016-05-26
Identifier
http://www.antarctica.ac.uk/dms/metadata.php?id= / GB/NERC/BAS/PDC/00602
Custodian
  British Antarctic Survey
High Cross, Madingley Road , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Originator
  British Antarctic Survey - Polar Data Centre
High Cross, Madingley , Cambridge , CB3 0ET , UK
+44 (0)1223 221400
Maintenance and update frequency
unknown Unknown
Keywords
  • NDGO0001
NERC OAI Harvesting
  • NERC_DDC
GCMD Parameter Valids
  • EARTH SCIENCE > Land Surface > Soils
  • EARTH SCIENCE > Land Surface > Soils > Microfauna
  • EARTH SCIENCE > Land Surface > Soils > Microflora
  • EARTH SCIENCE > Land Surface > Soils > Nitrogen
  • EARTH SCIENCE > Land Surface > Soils > Soil Moisture/Water Content
INSPIRE themes
  • Bio-geographical regions
BAS Free-text keywords
  • Nitrogen cycle
  • Signy Island
  • bare soil
  • mosses
  • orthinogenic soil
  • soil chemical composition
  • soil pore water
Use limitation
Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
Access constraints
otherRestrictions Other restrictions
Other constraints
Data released under Open Government Licence V3.0: http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/
Metadata language
EnglishEnglish
Topic category
  • Biota
  • Environment
N
S
E
W
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Begin date
2005-07-28
End date
2008-01-27
Reference system identifier
OGP / urn:ogc:def:crs:EPSG::4326
Distribution format
Distributor
  Polar Data Centre - British Antarctic Survey
+44 (0)1223 221400
Hierarchy level
dataset Dataset

Domain consistency

Measure identification
INSPIRE / Conformity_001

Conformance result

Date
Explanation
See the referenced specification
Pass
No
Statement
No special comments
File identifier
GB_NERC_BAS_PDC_00602 XML
Metadata language
EnglishEnglish
Hierarchy level
dataset Dataset
Date stamp
2016-05-26
Metadata standard name
NERC profile of ISO19115:2003
Metadata standard version
1.0
Point of contact
  British Antarctic Survey
+44 (0)1223 221400
Dataset URI
http://www.antarctica.ac.uk/dms/metadata.php?id=GB/NERC/BAS/PDC/00602
 
 

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Spatial extent

N
S
E
W
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Keywords


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