Australian subtropical vegetation and wetland response to fire, climate and nutrient availability during the Holocene
Files
File version
Accepted Manuscript (AM)
Author(s)
Mariani, Michela
Tibby, John
Tyler, Jonathan
Barr, Cameron
Leng, Melanie J
Moss, Patrick
Lewis, Richard
Cohen, Tim
Marx, Sam
McGregor, Glenn B
Marshall, Jonathan C
Petherick, Lynda
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
Size
File type(s)
Location
License
Abstract
The iconic sand dune systems of Minjerribah (North Stradbroke Island), in southeastern Queensland, Australia, host numerous lakes and swamps containing organic-rich sediment deposits that record changes in climate, fire and surrounding vegetation. Palaeoenvironmental reconstructions from individual locations can provide insights into changes in the environment, but determining the regional extent of these changes is seldom possible from a single site. Multi-site compilations help elucidate the geographical nature of environmental changes and determine if they are driven by local or regional forces. Here, a synthesis of palynological records from six Minjerribah wetlands using a muti-tiered Monte Carlo empirical orthogonal function (EOF) analysis allows island-wide patterns of vegetation change to be identified. Coherent changes in vegetation were recorded, with first-order changes (EOF1) indicating a long-term shift in vegetation composition from closed forests towards woodland and heath vegetation. A compilation of macroscopic and microscopic charcoal from the same sites shares coherent patterns of change with a rainfall record from the island, suggesting that regional fire occurrence between 7000 and 2000 cal a bp was driven primarily by long-term variations in rainfall and its influence on biomass. Comparison with fire activity, rainfall, sedimentary carbon, nitrogen and dust records from Minjerribah suggests that regional vegetation changes occur primarily in response to long-term changes in nutrients and increasing rainfall variability. This analysis highlights the multi-millennial connection between vegetation composition, climate, nutrients and fire occurrence across the Holocene in subtropical environments.
Journal Title
Journal of Quaternary Science
Conference Title
Book Title
Edition
Volume
Issue
Thesis Type
Degree Program
School
Publisher link
DOI
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
This work is covered by copyright. You must assume that re-use is limited to personal use and that permission from the copyright owner must be obtained for all other uses. If the document is available under a specified licence, refer to the licence for details of permitted re-use. If you believe that this work infringes copyright please make a copyright takedown request using the form at https://www.griffith.edu.au/copyright-matters.
Item Access Status
Note
This publication has been entered in Griffith Research Online as an advance online version.
Access the data
Related item(s)
Subject
Persistent link to this record
Citation
Cadd, H; Mariani, M; Tibby, J; Tyler, J; Barr, C; Leng, MJ; Moss, P; Lewis, R; Cohen, T; Marx, S; McGregor, GB; Marshall, JC; Petherick, L, Australian subtropical vegetation and wetland response to fire, climate and nutrient availability during the Holocene, Journal of Quaternary Science, 2024