Saturday, 15 September 2012

Snakes Minus Birds Equals More Spiders for Guam: Ecologists Look for Effects of Bird Loss Caused by Invasive Brown Treesnake

ScienceDaily (Sep. 13, 2012) — In one of the first studies to examine how the loss of forest birds is effecting Guam's island ecosystem, biologists from Rice University, the University of Washington and the University of Guam found that the Pacific island's jungles have as many as 40 times more spiders than are found on nearby islands like Saipan.

"You can't walk through the jungles on Guam without a stick in your hand to knock down the spiderwebs," said Haldre Rogers, a Huxley Fellow in Ecology and Evolutionary Biology at Rice and the lead author of a new study this week in the open-access journal PLOS ONE.

The results are some of the first to examine the indirect impact of the brown treesnake on Guam's ecosystem. The snake, which was accidentally introduced to the island in the 1940s, decimated the island's native bird species in one of the most infamous ecological disasters from an invasive species. By the 1980s, 10 of 12 native bird species had been wiped out, and the last two live only in small areas protected by intense snake-trapping.

Read on:
 http://www.sciencedaily.com/releases/2012/09/120913123631.htm

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