Abundance and genetic diversity responses of a lizard (Eulamprus heatwolei) to logging disturbance
Francesca Lyndon-Gee A , Joanna Sumner B , Yang Hu A , Claudio Ciofi C and Tim S. Jessop D E
+ Author Affiliations
- Author Affiliations
A School of BioSciences, The University of Melbourne, Melbourne, Vic. 3010, Australia.
B Museums Victoria, GPO Box 666, Melbourne, Vic. 3001, Australia.
C Department of Biology, University of Florence, Sesto Fiorentino 50019 (FI), Italy.
D School of Life and Environmental Sciences, Deakin University, Waurn Ponds, Vic. 3216, Australia.
E Corresponding author. Email: t.jessop@deakin.edu.au
Australian Journal of Zoology 65(6) 362-371 https://doi.org/10.1071/ZO17051
Submitted: 22 August 2017 Accepted: 27 April 2018 Published: 25 May 2018
Abstract
Rotational logging practices are used with the goal of reducing forest disturbance impacts on biodiversity. However, it is poorly understood whether such forest management practices conserve the demographic and genetic composition of animal populations across logged landscapes. Here we investigated whether rotational logging practices alter patterns of landscape-scale population abundance and genetic diversity of a forest-dwelling lizard (Eulamprus heatwolei) in south-eastern Australia. We sampled lizards (n = 407) at up to 48 sites across a chronosequence of logging disturbance intervals (<10 to >60 years after logging) to assess site-specific population changes and genetic diversity parameters. Lizard abundances exhibited a significant curvilinear response to time since logging, with decreased numbers following logging (<10 years), increased abundance as the forest regenerated (10–20 years), before decreasing again in older regenerated forest sites (>30 years). Lizard genetic diversity parameters were not significantly influenced by logging disturbance. These results suggest that logging practices, whilst inducing short-term changes to population abundance, had no measurable effects on the landscape-scale genetic diversity of E. heatwolei. These results are important as they demonstrate the value of monitoring for evaluating forest management efficacy, and the use of different population-level markers to make stronger inference about the potential impacts of logging activities.
Additional keywords: biodiversity monitoring, forest disturbance, population consequences, reduced-impact logging practices, reptile.
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