ID guide | introduced ants

Bottom-up effects on persistence of a specialist predator: Ant invasions and horned lizards

Publication Type:Journal Article
Year of Publication:2002
Authors:A. V. Suarez, Case T. J.
Journal:Ecological Applications
Date Published:February 2002

*[We examined how Argentine ants influence horned lizard growth rates by raising hatchlings on prey typical of invaded & uninvaded sites. Hatchling horned lizards maintained positive growth rates on a diet of just one native ant species, Crematogaster californica. However, on a diet of Argentine ants or arthropods typical of an invaded community, horned lizard growth rates were either negative or averaged near zero. In addition, when lizards were switched from a diet of Argentine ants to native ants, growth rates increased. One factor contributing to growth was foraging rate; capture success appears partly responsible for why horned lizards specialize on ants vs. other, harder to capture, arthropods. Moreover, a comparison of diets among age classes of coastal horned lizards suggests a diversity of ants is necessary to support lizard populations. ]

Alternate Journal:Ecol. Appl.
Scratchpads developed and conceived by (alphabetical): Ed Baker, Katherine Bouton Alice Heaton Dimitris Koureas, Laurence Livermore, Dave Roberts, Simon Rycroft, Ben Scott, Vince Smith