Monitoring bubble production in a seagrass meadow using a source of opportunity

Under high irradiance, the photosynthetic activity of dense seagrass meadows saturates the water forming oxygen bubbles. The diel cycle of bubble production peaks at mid-day, following light intensity pattern. It is well known that bubbles strongly affect the acoustic propagation, increasing signal...

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Main Authors: Felisberto, Paulo, Rodríguez, Orlando C., Silva, João P., Jesus, Sérgio, Ferreira, Hugo Q., Ferreira, Pedro P., Cunha, Maria E., de los Santos, Carmen B., Olivé, Irene, Santos, Rui
Format: Conference Proceeding
Language:English
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Summary:Under high irradiance, the photosynthetic activity of dense seagrass meadows saturates the water forming oxygen bubbles. The diel cycle of bubble production peaks at mid-day, following light intensity pattern. It is well known that bubbles strongly affect the acoustic propagation, increasing signal attenuation and decreasing the effective water sound speed, noticeable at low frequencies. Thus, the diurnal variability of bubbles may show an interference pattern in the spectrograms of low frequency acoustic signals. In an experiment conducted in July 2016 at the Aquaculture Research Station of the Portuguese Institute for the Sea and Atmosphere in Olhão, Portugal, the spectrograms of low frequency (
ISSN:1939-800X
DOI:10.1121/2.0000584