Presentation Title

Acoustic Bat Survey of Santa Rosa Island

Faculty Mentor

Jason Miller, Phd

Start Date

23-11-2019 10:45 AM

End Date

23-11-2019 11:30 AM

Location

82

Session

poster 4

Type of Presentation

Poster

Subject Area

biological_agricultural_sciences

Abstract

The Channel Islands National Park encompasses five islands. Santa Rosa Island is the second largest of all the islands. It contains over 53,000 acres of sandy beaches, open grasslands, steep canyons, and is home to a variety of species that are endemic to the island. After 154 years of ranching and sport hunting, Santa Rosa Island is in the process of returning to wilderness. Because bats are an indicator species of ecosystem health, an understanding of how the island’s bat populations change over time will shed light on the islands recovery. The island’s rugged environment limits what people know about the bat populations. Currently, the Myotis californicus is the only species that has been physically confirmed on the island, though mammalogist expect up to eight species to inhabit the island. This survey utilized ultrasonic detectors, such as Anabat, were used to identify bat species by recording their ultrasonic search-phase calls. Anabat Insight, an analysis software, visualizes the data collected and produced measurements, such as minimum and maximum frequency. These measurements were used to identify bat species on the island through machine learning technology. As a result, this has lead to the conclusion that at least four species are now thriving on Santa Rosa Island.

This document is currently not available here.

Share

COinS
 
Nov 23rd, 10:45 AM Nov 23rd, 11:30 AM

Acoustic Bat Survey of Santa Rosa Island

82

The Channel Islands National Park encompasses five islands. Santa Rosa Island is the second largest of all the islands. It contains over 53,000 acres of sandy beaches, open grasslands, steep canyons, and is home to a variety of species that are endemic to the island. After 154 years of ranching and sport hunting, Santa Rosa Island is in the process of returning to wilderness. Because bats are an indicator species of ecosystem health, an understanding of how the island’s bat populations change over time will shed light on the islands recovery. The island’s rugged environment limits what people know about the bat populations. Currently, the Myotis californicus is the only species that has been physically confirmed on the island, though mammalogist expect up to eight species to inhabit the island. This survey utilized ultrasonic detectors, such as Anabat, were used to identify bat species by recording their ultrasonic search-phase calls. Anabat Insight, an analysis software, visualizes the data collected and produced measurements, such as minimum and maximum frequency. These measurements were used to identify bat species on the island through machine learning technology. As a result, this has lead to the conclusion that at least four species are now thriving on Santa Rosa Island.