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Identifying Acoustic Indices Of Oyster Reef Health
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2022
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[PDF-688.50 KB]
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Description:Oyster reefs provide habitat, breeding grounds, and food for a number of organisms, many of which are sound producing. Currently, oyster reefs are declining, and traditional monitoring methods are time consuming, labor intensive, and invasive. Passive acoustic monitoring (PAM) is less invasive, takes less time, and requires less labor than traditional monitoring methods, such as benthic habitat tray sampling. Additionally, PAM has great potential for detecting soundproducing organisms, and acoustic indices could provide essential information on the health and biodiversity of an oyster reef and its surrounding area. However, acoustic monitoring in marine environments is relatively new and knowledge is lacking compared to terrestrial systems where passive acoustic monitoring is widely used. Here, we determine if acoustic indices are an accurate representation of oyster reef health and biodiversity across two basins in Louisiana. We compared sound pressure levels in several frequency bands (20-2000 Hz,1-10 kHz, and 20 Hz – 48 kHz) and several acoustic complexity indices to biodiversity estimates generated through a traditional sampling technique, benthic habitat trays. Some acoustic indices are promising, but relationships across basins are different. These results provide the first set of evidence that will allow us to determine if acoustic monitoring and acoustic indices can be used as an indicator of biodiversity and health of oyster reefs.
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Rights Information:CC0 Public Domain
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Compliance:Submitted
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