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Graduate student presents in Thailand on the critical role of bats in Guam as seed dispersers

Graduate student presents in Thailand on the critical role of bats in Guam as seed dispersers

Graduate student presents in Thailand on the critical role of bats in Guam as seed dispersers


9/27/2019

18th International Bat Research Conference in Phuket, Thailand
18th International Bat Research Conference in Phuket, Thailand. Photo courtesy of the International Bat Research Conference

 

Jeried Calaor, a  student at the 91快播, joined about 450 other researchers from around the globe in August for the  in Phuket, Thailand, to present his thesis work on the threatened Mariana fruit bat.

Marianas fruit batHis research focused on the bat鈥檚 role as a seed disperser, a critical function to maintain forest biodiversity and health.

鈥淥verall, it was really a positive experience,鈥 Calaor said. 鈥淚t was my first international conference and the first time I presented to an international audience. And I was able to learn from other researchers who are facing the same issues with their bat species.鈥

 The conference aims to bring together scientists to share new findings and innovative ideas on conducting research and, most importantly, the future of bat conservation. Bat populations around the world have declined, and more than 180 different species are listed as critically endangered, endangered, or vulnerable.   

 Today, only 45 to 50 fruit bats remain on Guam because of poaching and habitat destruction.

Ever since human activity began detrimentally impacting forests and the brown tree snake wiped out nearly all birds, the fruit bats have been one of the few seed dispersers left standing. A better understanding of their ability to disperse seeds is critical for conservation efforts for both the bat and forests.

Calaor's presentation
Calaor with his biology professor, Daniel Lindstrom, at the International Bat Research Conference in Phuket, Thailand
For his research, Calaor studied how well the fruit bats, known locally as fanihi, dispersed the seeds from a native fig tree Ficus prolixa.

 Calaor fed four bats living at the Guam Zoo fruit from the trees and then collected seeds that either passed through their digestive systems or were ejected from their mouths after chewing them. He then planted each to compare germination. After a month, he found that 鈥渆jecta鈥 seeds had greater germination rates than those found in the bat droppings.

 Ejecta seeds are typically left behind near the parent tree, while seeds from the bat鈥檚 droppings end up further away 鈥 which is more beneficial since it helps ensure growth elsewhere.

Despite the lower germination rates, the study suggests there is still dispersal occurring across longer distances, Calaor said, which reaffirms the bats鈥 important role and supports the need to restore and better protect them and their habitats.

Daniel P. Lindstrom, an associate professor of biology and Calaor鈥檚 academic advisor, also attended the conference.

Calaor kayaking
Calaor takes a kayaking tour through remote islands in Phuket, Thailand.
During the 10-day trip, on a kayaking tour organized by Lindstrom through remote islands, Calaor was able to witness something he has never seen before: hundreds of bats swarming above.

鈥淚t was a moving experience for me because we only have 50 bats, and seeing them is really rare,鈥 he said.

The biggest takeaway from the conference for Calaor was realizing Guam isn鈥檛 alone in its fight.

鈥淭here are a lot of people who put their time, money, and efforts into researching endangered species to try to bring back their populations,鈥 he said. 鈥淭hat was special for me to see because there are people out there to lean to for advice, tap into their experience, and learn their methodologies to make the research better.鈥

Calaor鈥檚 travel to the conference and research work were supported by the Research Corporation of the 91快播 and the College of Natural & Applied Sciences.