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Snakes minus birds equals more spiders for Guam
Date:9/13/2012

when attempting to predict how entire ecosystems will react to change.

Rogers landed her first job out of college on Guam in 2002. "I had no idea where it was," she recalled. "I had to look it up on a map." She quickly fell in love with the narrow, 30-mile-long island, a mecca for tourists who are drawn by the tropical island's beaches, diving and snorkeling.

Guam is a U.S. territory, and to prevent brown treesnakes from spreading to other islands, the U.S. spends more than $1 million a year searching airplanes and cargo to prevent the snakes from escaping Guam. However, the reclusive, nocturnal reptiles are extremely hard to find. Rogers said the average resident or tourist on Guam will never see one, and even those who actively hunt them are hard-pressed to find one, which is one reason the snakes have been impossible to eradicate from the island.

Rogers' first job on Guam was to lead the U.S. Geological Survey's brown treesnake rapid response team, a small group of snake hunters charged with capturing brown treesnakes that manage to get off the island. Specifically, the team's mission is to respond within 24 hours of any sighting of a brown treesnake on any island that is served by flights from Guam.

"When I was out there searching for snakes at night, I spent a lot of time thinking about the differences between the forests I was walking through and the forests back on Guam," Rogers said. The spiderwebs were just one difference. The lack of songbirds also make Guam's forests eerily quiet during the day, she said. By the time Rogers enrolled in graduate school at the University of Washington in 2005, she had a number of ideas for ecological field studies aimed at measuring and explaining the differences she'd observed.

"There isn't any other place in the world that has lost all of its insect-eating birds," she said. "There's no other place you can look to see what happens when birds are removed over an entire landscape
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Contact: Jade Boyd
jadeboyd@rice.edu
713-348-6778
Rice University
Source:Eurekalert  

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