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Ecology biased against non-native species?
Date:6/8/2011

ial, as in the example of the Pine Bark beetle, which is decimating North American pine forests.

Chew and Stromberg have studied the impact of the non-native species in riparian ecosystems, most particularly tamarisk trees in the Southwest United States. Introduced to control erosion, Chew and Stromberg consider its continued perception as a pest species, water consumer and invader overplayed, while research shows its ecological role and ecosystem services have been undervalued. They point to outmoded perspectives and continued deference to outdated science as playing strong roles in negative perceptions of the species and intensive investment in eradication efforts. Recent discoveries have found that tamarisk in fact provides nesting habitat for birds, including the endangered Southwestern willow flycatcher, and that regional water management and climate change increasingly favor tamarisk over once-common cottonwoods and willows.

While the introduction of non-native species was noted as early as the 1620s, by Sir Francis Bacon, the field of invasion biology arose as an ecological approach as recently as the 1980s and 90s, inspired by Charles Elton's 1958 The Ecology of Invasions by Animals and Plants. More recent appraisals of Elton's research and publications by prominent ecologists now prompt a call for a change, these authors believe: "Invasion implies so many values. We need to consider the impact of these terms and approaches and how they affect scientific perception, public perception, and in turn, decision-making in conservation and restoration management."


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Contact: Margaret Coulombe
margaret.coulombe@asu.edu
480-727-8934
Arizona State University
Source:Eurekalert  

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