Development of a diatom-based transfer function for lakes and streams severely impacted by secondary salinity in the south-west region of Western Australia |
| |
Authors: | Fiona E Taukulis Jacob John |
| |
Institution: | (1) Department of Environmental Biology, Curtin University of Technology, GPO Box U1987, Perth, WA, 6845, Australia |
| |
Abstract: | The association of diatom assemblages to salinity was studied in 95 lakes and streams ranging from freshwater to hypersaline
in the south-west of Western Australia. The relationship between environmental variables and species composition was explored
using canonical correspondence analysis (CCA) and partial CCA. Salinity was shown to account for a significant and independent
amount of variation in the diatom data, enabling a transfer function to be developed based on the final dataset, which consisted
of 89 sites and 150 diatom taxa. The most successful model was derived using tolerance-downweighted weighted averaging. Summary
statistics showed that the transfer function performed very well with a high coefficient of determination and low prediction
errors that remained high after the cross-validation method of jackknifing (r
apparent2 = 0.97 and r
jackknifed2 = 0.89). This suggests that salinity can be accurately predicted using relative abundances of diatoms, and the model can
now be applied to paleolimnological reconstructions. However, the transfer function also provides the basis for use in future
biomonitoring studies to detect increases in salinity for lakes and streams most at risk, as well as to evaluate the success
of remediation measures implemented to secondary salinised systems.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.
Guest Editors: J. John & B. Timms
Salt Lake Research: Biodiversity and Conservation—Selected papers from the 9th Conference of the International Society for
Salt Lake Research |
| |
Keywords: | South-west Western Australia Diatoms Salinity Transfer function |
本文献已被 SpringerLink 等数据库收录! |
|