Presentation Title

Dendrobates pumilio and UV-B Avoidance in the Aftermath of a Tropical Storm

Faculty Mentor

Lee Kats

Start Date

17-11-2018 8:30 AM

End Date

17-11-2018 10:30 AM

Location

CREVELING 17

Session

POSTER 1

Type of Presentation

Poster

Subject Area

biological_agricultural_sciences

Abstract

Ultraviolet-B radiation negatively impacts amphibian development and behavior across life stages. Amphibians in the neotropics remain disproportionately susceptible to increased UV-B. One diurnal neotropical poison frog species, Dendrobates pumilio, actively vocalizes during the day and has been shown to behaviorally avoid increased levels of UV-B. Recently, an intense tropical storm disturbed large portions of forest at the La Selva Biological Station in Costa Rica, exposing large areas of D. pumilio habitat to higher than average levels of UV-B. We investigated the relationship between number of fallen trees in disturbed areas of forest and UV-B, and consequently the relationship between number of D. pumilio detected and fallen trees. Here, we investigated the relationship between UV-B level and perches selected by vocalizing male frogs in areas disturbed and undisturbed by the storm. We found that ambient UV-B was significantly higher in areas with a high number of fallen trees, and there were significantly fewer D. pumilio detected in areas with a high number of fallen trees compared to undisturbed areas. Additionally, we found that in areas of high tree fall, frogs called from perches that received significantly lower UV-B compared to ambient UV-B in disturbed areas of forest. However, both perch UV-B and ambient UV-B of disturbed forest areas were significantly higher than perch UV-B and ambient UV-B in areas of the forest undisturbed by the storm.

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Nov 17th, 8:30 AM Nov 17th, 10:30 AM

Dendrobates pumilio and UV-B Avoidance in the Aftermath of a Tropical Storm

CREVELING 17

Ultraviolet-B radiation negatively impacts amphibian development and behavior across life stages. Amphibians in the neotropics remain disproportionately susceptible to increased UV-B. One diurnal neotropical poison frog species, Dendrobates pumilio, actively vocalizes during the day and has been shown to behaviorally avoid increased levels of UV-B. Recently, an intense tropical storm disturbed large portions of forest at the La Selva Biological Station in Costa Rica, exposing large areas of D. pumilio habitat to higher than average levels of UV-B. We investigated the relationship between number of fallen trees in disturbed areas of forest and UV-B, and consequently the relationship between number of D. pumilio detected and fallen trees. Here, we investigated the relationship between UV-B level and perches selected by vocalizing male frogs in areas disturbed and undisturbed by the storm. We found that ambient UV-B was significantly higher in areas with a high number of fallen trees, and there were significantly fewer D. pumilio detected in areas with a high number of fallen trees compared to undisturbed areas. Additionally, we found that in areas of high tree fall, frogs called from perches that received significantly lower UV-B compared to ambient UV-B in disturbed areas of forest. However, both perch UV-B and ambient UV-B of disturbed forest areas were significantly higher than perch UV-B and ambient UV-B in areas of the forest undisturbed by the storm.