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Study links success of invasive Argentine ants to diet shifts
Date:12/18/2007

s not only been a problem for native ant species, but for species that feed on the larger native ants. One such creature is the coastal horned lizard, which has declined by at least 50 percent in recent years.

Holway said their previous research had shown that the Argentine ants tended to invade semi-arid regions of Southern California where new residential developments and backyard gardens have sprouted, requiring increased irrigation.

We now know why, he said. Our latest study demonstrates that plant-based resources such as honeydew and nectar are important to the expansion of Argentine ant colonies. It also offers a lesson for California residents wanting to control ant infestations in their homes. If you cut down on watering to limit plant growth, Argentine ant numbers should decline, Holway said.


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Contact: Kim McDonald
kmcdonald@ucsd.edu
858-534-7572
University of California - San Diego
Source:Eurekalert

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