Presentation Details
| Beyond predation: Impacts of introduced terrestrial mammalian predators on their native counterparts Madeleine E.Zuercher1, Debra M.Shier1, 2, Gregory F.Grether1. 1University of California, Los Angeles, CA, USA.2San Diego Zoo Wildlife Alliance, Escondido, CA, USA |
Abstract
Globalization and climate change are accelerating biological invasions worldwide. Invasive species, and cats (Felis catus) in particular, are a primary cause of biodiversity declines. While these introduced predators have caused numerous extinctions of prey species, less is understood about the extent of their impacts on native predators. We reviewed studies on introduced predators and their non-consumptive effects on their native counterparts. Many studies have identified patterns of impact, which are often shifts to native predator spatial ecology and diets. Yet, the mechanisms driving these patterns are often unclear. By incorporating behavioral studies into invasion ecology research, we can better understand why and how these patterns develop. We present a case study on the impacts of invasive cats on an insular ringtail (Bassariscus astutus saxicola) population. Using camera traps and a behavioral experiment, we show how cats alter ringtail ecology and identify a behavioral mechanism driving these changes. Uncovering the behavioral processes underlying observed patterns is a key step for evaluating effective management strategies for introduced predators.
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No part of this publication may be reproduced, distributed, or transmitted in any form or by any means, including photocopying, recording, or other electronic or mechanical methods, without the prior written permission of the author.
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