[Parameters: Topic='BIOSPHERE', Term='VEGETATION', Variable_Level_1='NITROGEN']
Nitrogen acquisition, assimilation and allocation in plants in Subantarctic and Antarctic ecosystemsEntry ID: ASAC_773
Abstract: In this study the nitrogen sources of plants were investigated for Macquarie Island in an ecosystem influenced by large amounts of animal-derived nitrogen. Different plant communities were studied in close and intermediate proximity to animal sites and at remote sites. Fluxes of animal derived nitrogen and plant nitrogen sources were estimated using 15N natural abundance. Furthermore we examined whether fossil peat retained past plant isotopic composition by cross-correlating two Holocene sites, which had strong fossil records with peat and extant plant delta 15N signatures.
Present data and archived peats collected for a previous project were sampled.
Data Set Citation
Dataset Release Date: 2013-02-21
Start Date: 1994-09-01Stop Date: 1996-03-31
ISO Topic Category
Quality Dates provided in temporal coverage are approximate only.
See the attached papers for more information.
Access Constraints A word document containing some summary data is available for download at the provided URL. PDF copies of the referenced papers are also available for download by Australian Antarctic Division personnel only.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=ASAC_773 when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 176 kb
Distribution Format: Word
Distribution Media: HTTP
Distribution Size: 220 kb
Distribution Format: pdf
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 8 9380 3159
Fax: +61 8 9380 1058
Email: gstewart at science.uwa.edu.au
EXECUTIVE DEAN THE UNIVERSITY OF WESTERN AUST THE CHEMISTRY BUILDING FACULTY OF SCIENCE
Province or State: Western Australia
Postal Code: 6907
Erskine, P.D., Bergstrom, D.M., Schmidt, S., Stewart, G.R., Tweedie, C.E., and Shaw, J.D. (1998), Subantarctic Macquarie Island - a model ecosystem for studying animal-derived nitrogen sources using 15 N natural abundance., Oecologia, 117, 187-193
Bergstrom, D.M., Stewart, G.R., Selkirk, P.M. and Schmidt S (2001), 15N Natural abundance of fossil peat reflects past vegetation nitrogen sources and ecosystem processes on subantarctic Macquarie Island., Oecologia, 130, 309-314
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 2000-08-07
Last DIF Revision Date: 2013-02-21