Abstract Details

ID: 1747
Title: Palaeobotanical evidence for the pattern of rainfall variability in western Victoria, south-eastern Australia
Content:

High resolution, multiproxy records, from several lakes on the volcanic plains of western Victoria, south-eastern Australia, are providing evidence for a number of dry periods over the last 2000 years, rivalling that which has dominated the landscape over the last decade. Evidence is primarily from diatoms but, in shallow lakes where diatom preservation can be an issue and where aquatic macrophytes are important, pollen analysis is sensitively revealing variation in lake conditions. This sensitivity is increased where the presence of seeds allows identification of indicator taxa to species level. Significant dry periods are evident every few hundred years although determination of their exact frequency, duration and regional expression awaits age refinements from lead-210 and radiocarbon dating. Each dry period has a distinct palaeoecological signature that may suggest differences in intensity, climatic trigger or land use activity.

Session: 9 Regional climate change during the last 2000 years – contributions to the PAGES 2k Network
Authors: Tara Lewis
Kimberley Parker
Merna McKenzie
Keely Mills
Peter Gell
Peter Kershaw
Presenter:Tara Lewis
Type: poster