AI Article Synopsis
- Monitoring soundscapes is crucial for understanding environmental conditions for species that rely on sound, particularly in Oregon's coastal regions, where data has been limited.
- From 2017 to 2021, two hydrophones recorded underwater sounds in two locations – one near the busy Port of Newport and the other in a protected Marine Reserve 17 km away.
- Results showed that vessel noise was louder at the Port, with median sound levels up to 6 dB higher, and whales were detected more frequently in the Marine Reserve, highlighting the impact of human activity on underwater sound environments.
Article Abstract
Monitoring soundscapes is essential for assessing environmental conditions for soniferous species, yet little is known about sound levels and contributors in Oregon coastal regions. From 2017 to 2021, during June-September, two hydrophones were deployed near Newport, Oregon to sample 10-13,000 Hz underwater sound. One hydrophone was deployed near the Port of Newport in a high vessel activity area, and another 17 km north within a protected Marine Reserve. Vessel noise and whale vocalizations were detected at both sites, but whales were recorded on more days at the Marine Reserve. Median sound levels in frequencies related to noise from various vessel types and sizes (50 - 4,000 Hz) were up to 6 dB higher at the Port of Newport, with greater diel variability compared to the Marine Reserve. In addition to documenting summer season conditions in Oregon waters, these results exemplify how underwater soundscapes can differ over short distances depending on anthropogenic activity.
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| http://dx.doi.org/10.1016/j.marpolbul.2023.115406 | DOI Listing |
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