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A weighted-averaging regression and calibration model for inferring lakewater salinity from fossil diatom assemblages in saline lakes of the Vestfold Hills: a new tool for interpreting Holocene lake histories in Antarctica

journal contribution
posted on 2023-05-16, 11:21 authored by Roberts, D, Andrew McMinnAndrew McMinn
The relationship between surface sediment diatom assemblages and measured limnological variables in thirtythree coastal Antarctic lakes from the Vestfold Hills was examined by constructing a diatom-water chemistry dataset. Previous analysis of this dataset by canonical correspondence analysis revealed that salinity accounted for a significant amount of the variation in the distribution of the diatom assemblages. Weighted-averaging regression and calibration of this diatom-salinity relationship was used to establish a transfer function for the reconstruction of past lakewater salinity from fossil diatom assemblages. Weighted-averaging regression and calibration with classical deshrinking provided the best model for salinity reconstructions and this was applied to the fossil diatom assemblages from one of the saline lakes in the Vestfold Hills in order to assess its potential for palaeosalinity and palaeoclimate reconstruction.

History

Publication title

Journal of Paleolimnology

Volume

19

Pagination

99-113

ISSN

0921-2728

Department/School

Institute for Marine and Antarctic Studies

Publisher

Kluwer Academic Publishers

Place of publication

Belgium

Repository Status

  • Restricted

Socio-economic Objectives

Management of Antarctic and Southern Ocean environments not elsewhere classified

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