Skip to main content
Log in

Shrinking into the big city: influence of genetic and environmental factors on urban dragon lizard morphology and performance capacity

  • Published:
Urban Ecosystems Aims and scope Submit manuscript

This article has been updated

Abstract

Urban wildlife faces a novel set of challenges resulting in selective pressure that can lead to population-level changes. We studied Australian water dragons (Intellagama lesueurii) from urban and natural populations to test if urban populations differed in body size, shape, and performance capacity. If urban-derived morphology has arisen through selection, we predicted distinct morphological differences between wild dragons from urban and natural areas in both adult and hatchling life-stages. Urban hatchlings were morphologically distinct (shorter body lengths and longer limbs) from natural populations, while urban adult males continued this trend but only for body size (shorter body lengths). We then experimentally reared hatchlings originating from urban and natural populations within urban- and natural-style enclosures (2 × 2 factorial design) for a year to determine if differences in morphology and performance capacity (sprint speed, endurance, and clinging ability) were related to either the individual’s origin population or developmental environment. Yearlings reared in urban-style enclosures, irrespective of population origin, had smaller body sizes compared to those from natural-style enclosures, suggesting developmental environment was affecting their morphology. Despite this difference in body size, yearling dragon performance capacity was not significantly different between treatments. Overall, this study provides evidence of a complex relationship driving urban-divergent morphology – whereby urban dragons emerge as smaller hatchlings with longer limbs (innate traits) and are then further influenced by the urban environments that they develop in (phenotypic plasticity); however, and potentially owing to behavioral, ecological, and demographical differences, these changes appear to be sex-specific.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2

Similar content being viewed by others

Data Availability

Data and R code are available from the Open Science Framework at https://osf.io/gk6jh/.

Change history

  • 21 December 2020

    Springer Nature’s version of this paper was updated to present the correct information in the Code availability section.

References

Download references

Acknowledgments

We would like to thank the many individuals who assisted in fieldwork: P. Bolton, T. Damasio, C. Fryns, G. Hughes, F. Kar, S. Klopper, L. Monk-Whipp, M. Mühlenhaupt, D. Noble, and C. Wilson, as well as Taronga Zoo and the Lizard Lab animal care volunteers. We would also like to thank a host of anonymous reviewers for their comments that have improved this manuscript.

Funding

This research and JBG was supported by scholarship from Macquarie University and the Natural Sciences and Engineering Research Council (NSERC) during data collection, and a DSI-NRF Centre of Excellence for Invasion Biology postdoctoral fellowship. During this research JLR was supported by an Endeavour, Claude Leon Foundation, and a NSERC postdoctoral fellowship.

Author information

Authors and Affiliations

Authors

Contributions

JBG, CHF, and MJW conceived the idea for this study, JBG led the data collection, JLR led the statistical analysis, and JBG, JLR, CHF, and MJW contributed to the writing of the manuscript.

Corresponding author

Correspondence to James Baxter-Gilbert.

Ethics declarations

Conflicts of interest

We have not any conflicts of interest or competing interests.

Ethics approval

Experimental protocols were approved by the Macquarie University Animal Ethics Committee (ARA # 2015/023), the Taronga Zoo Animal Ethics Committee (ARA # 3b/08/15), and New South Wales National Parks and Wildlife Services (scientific license # SL100570).

Consent for publication

We consent to the publication of our research and manuscript.

Code availability

Data and R code are available from the Open Science Framework at https://osf.io/gk6jh/.

Electronic supplementary material

ESM 1

(PDF 177 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Baxter-Gilbert, J., Riley, J.L., Frère, C.H. et al. Shrinking into the big city: influence of genetic and environmental factors on urban dragon lizard morphology and performance capacity. Urban Ecosyst 24, 661–674 (2021). https://doi.org/10.1007/s11252-020-01065-4

Download citation

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11252-020-01065-4

Keywords

Navigation