Applications for marine mammal studies using passive acoustic data from the Coastal Endurance array off Newport, Oregon

The National Science Foundation-funded Ocean Observatories Initiative (OOI) maintains a series of coastal and oceanic monitoring sites that consists of a multitude of physical and biological sensors. As part of this program, OOI has collected continuous, broadband passive acoustic data along the continental shelf and slope off Newport, Oregon since 2016. The Coastal Endurance cabled array consists of two mooring lines that straddle the Columbia River plume, and capture data from this nutrient rich upwelling site along the northeast Pacific coast. In addition to this instrumentation, underwater gliders conduct regular transects to provide better spatial resolution of coastal ocean parameters in the region. Representative data from the continental slope and seamount recording sites of the Coastal Endurance Array were reviewed for vocally active marine mammals. Physical oceanographic variables collected concurrently from the mooring line instrumentation and coastal gliders were used to spatially and temporally characterize the regional marine mammal habitat. This effort demonstrates applications for use of OOI’s accessible, multi-instrument platform for conducting marine mammal ecosystem studies.