Acoustic indices respond to specific marine mammal vocalizations and sources of anthropogenic noise
Using passive acoustic methods for biodiversity conservation and effective ecosystem monitoring is hindered by laborious, human-mediated processes of accurately identifying biologic and anthropogenic sounds within large datasets. Soundscape ecology provides a potential means of addressing this need...
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ftdoajarticles:oai:doaj.org/article:b081a443bc6849ea9bdd98a26677d143 2023-05-15T17:59:27+02:00 Acoustic indices respond to specific marine mammal vocalizations and sources of anthropogenic noise Elizabeth L. Ferguson Hannah M. Clayton Taiki Sakai 2023-02-01T00:00:00Z https://doi.org/10.3389/fmars.2023.1025464 https://doaj.org/article/b081a443bc6849ea9bdd98a26677d143 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.1025464/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1025464 https://doaj.org/article/b081a443bc6849ea9bdd98a26677d143 Frontiers in Marine Science, Vol 10 (2023) acoustic indices bioacoustics marine mammals soundscape anthropogenic noise Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.1025464 2023-02-19T01:46:19Z Using passive acoustic methods for biodiversity conservation and effective ecosystem monitoring is hindered by laborious, human-mediated processes of accurately identifying biologic and anthropogenic sounds within large datasets. Soundscape ecology provides a potential means of addressing this need through the use of automated acoustic-based biodiversity indices, which show promise in representing biodiversity in terrestrial environments. However, the direct relationship between specific underwater sounds and acoustic index measurements are largely unexplored. Using passive acoustic data collected from three broadband hydrophones within the Ocean Observatories Initiative’s cabled arrays in the Pacific northwest, we identified periods of vocalizing marine mammals and sources of anthropogenic noise. Automated calculations of seven acoustic indices were compared across biologic and anthropogenic sound type and call parameters. Although several index measurements did not vary significantly, the Acoustic Complexity Index (ACI) measurements increased in response to echolocation clicks from sperm whales (Physeter macrocephalus) and burst pulses originating from unidentified delphinid species. Measurements of the Bioacoustic Index (BI) decreased dramatically in response to sperm whale echolocation clicks, a more obvious trend when loud clicks were parsed from moderate and quiet clicks. Correlations coefficient and confidence interval values between ACI and BI measurements and call characteristics from sperm whales indicate a moderate to strong relationship, which was not found in correlations with delphinid calls. A generalized linear mixed-effect model indicated multiple species and sound types contribute significantly to the variation of several index measurements. Noise generated by passing ships consistently resulted in decreased values for the Normalized Difference Soundscape Index (NDSI) and Total Entropy (H) as compared to quiet periods and periods with vocalizing marine mammals. These findings provide ... Article in Journal/Newspaper Physeter macrocephalus Sperm whale Directory of Open Access Journals: DOAJ Articles Pacific Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
acoustic indices bioacoustics marine mammals soundscape anthropogenic noise Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
acoustic indices bioacoustics marine mammals soundscape anthropogenic noise Science Q General. Including nature conservation geographical distribution QH1-199.5 Elizabeth L. Ferguson Hannah M. Clayton Taiki Sakai Acoustic indices respond to specific marine mammal vocalizations and sources of anthropogenic noise |
topic_facet |
acoustic indices bioacoustics marine mammals soundscape anthropogenic noise Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Using passive acoustic methods for biodiversity conservation and effective ecosystem monitoring is hindered by laborious, human-mediated processes of accurately identifying biologic and anthropogenic sounds within large datasets. Soundscape ecology provides a potential means of addressing this need through the use of automated acoustic-based biodiversity indices, which show promise in representing biodiversity in terrestrial environments. However, the direct relationship between specific underwater sounds and acoustic index measurements are largely unexplored. Using passive acoustic data collected from three broadband hydrophones within the Ocean Observatories Initiative’s cabled arrays in the Pacific northwest, we identified periods of vocalizing marine mammals and sources of anthropogenic noise. Automated calculations of seven acoustic indices were compared across biologic and anthropogenic sound type and call parameters. Although several index measurements did not vary significantly, the Acoustic Complexity Index (ACI) measurements increased in response to echolocation clicks from sperm whales (Physeter macrocephalus) and burst pulses originating from unidentified delphinid species. Measurements of the Bioacoustic Index (BI) decreased dramatically in response to sperm whale echolocation clicks, a more obvious trend when loud clicks were parsed from moderate and quiet clicks. Correlations coefficient and confidence interval values between ACI and BI measurements and call characteristics from sperm whales indicate a moderate to strong relationship, which was not found in correlations with delphinid calls. A generalized linear mixed-effect model indicated multiple species and sound types contribute significantly to the variation of several index measurements. Noise generated by passing ships consistently resulted in decreased values for the Normalized Difference Soundscape Index (NDSI) and Total Entropy (H) as compared to quiet periods and periods with vocalizing marine mammals. These findings provide ... |
format |
Article in Journal/Newspaper |
author |
Elizabeth L. Ferguson Hannah M. Clayton Taiki Sakai |
author_facet |
Elizabeth L. Ferguson Hannah M. Clayton Taiki Sakai |
author_sort |
Elizabeth L. Ferguson |
title |
Acoustic indices respond to specific marine mammal vocalizations and sources of anthropogenic noise |
title_short |
Acoustic indices respond to specific marine mammal vocalizations and sources of anthropogenic noise |
title_full |
Acoustic indices respond to specific marine mammal vocalizations and sources of anthropogenic noise |
title_fullStr |
Acoustic indices respond to specific marine mammal vocalizations and sources of anthropogenic noise |
title_full_unstemmed |
Acoustic indices respond to specific marine mammal vocalizations and sources of anthropogenic noise |
title_sort |
acoustic indices respond to specific marine mammal vocalizations and sources of anthropogenic noise |
publisher |
Frontiers Media S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.1025464 https://doaj.org/article/b081a443bc6849ea9bdd98a26677d143 |
geographic |
Pacific |
geographic_facet |
Pacific |
genre |
Physeter macrocephalus Sperm whale |
genre_facet |
Physeter macrocephalus Sperm whale |
op_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.1025464/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.1025464 https://doaj.org/article/b081a443bc6849ea9bdd98a26677d143 |
op_doi |
https://doi.org/10.3389/fmars.2023.1025464 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1766168255316099072 |