How well do predators adjust to climate-mediated shifts in prey distribution? A study on Australian water pythons

Beata Ujvari, Richard Shine, Thomas Madsen*

*Corresponding author for this work

Research output: Contribution to journalArticle

18 Citations (Scopus)
6 Downloads (Pure)

Abstract

Climate change can move the spatial location of resources critical for population viability, and a species' resilience to such changes will depend upon its ability to flexibly shift its activities away from no-longer-suitable sites to exploit new opportunities. Intuition suggests that vagile predators should be able to track spatial shifts in prey availability, but our data on water pythons (Liasis fuscus) in tropical Australia suggest a less encouraging scenario. These pythons undergo regular long-range (to .10 km) seasonal migrations to follow flooding-induced migrations by their prey (native dusky rats, Rattus colletti). However, when an extreme flooding event virtually eliminated rats for a three-year period, the local pythons did not disperse despite the presence of abundant rats only 8 km away; instead, many pythons starved to death. This inflexibility suggests that some vagile species that track seasonally migrating prey may do so by responding to habitat attributes that have consistently predicted prey availability over evolutionary time, rather than reacting to proximate cues that signal the presence of prey per se. A species' vulnerability to climate change will be increased by an inability to shift its activities away from historical sites toward newly favorable areas.

Original languageEnglish
Pages (from-to)777-783
Number of pages7
JournalEcology
Volume92
Issue number3
DOIs
Publication statusPublished - Mar 2011
Externally publishedYes

Bibliographical note

Copyright 2011 by the Ecological Society of America. Ujvari, B., Shine, R., & Madsen, T. (2011). How well do predators adjust to climate‐mediated shifts in prey distribution? A study on Australian water pythons. Ecology, 92(3), 777-783. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • climate change
  • dusky rats
  • extreme climatic events
  • Liasis fuscus
  • predator-prey demography
  • Rattus colletti
  • spatial heterogeneity
  • tropical Australia
  • vagile species
  • water pythons

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