Acoustic monitoring of O-2 production of a seagrass meadow

AuthorCount:13;
Acoustic data were acquired in October 2011 over a Posidonia oceanica meadow in the Bay of la Revellata, Calvi, Corsica. The purpose was to develop an acoustic system for monitoring the oxygen (O-2) production of an entire seagrass meadow. In a shallow water area (<38 m), densely covered by P. oceanica, a sound source transmitted signals in 3 different bands (400-800 Hz, 1.5-3.5 kHz and 65-8.5 kHz) toward three self-recording hydrophones at a distance of 100 m, over the period of one week. The data show a high correlation between the diel cycle of the acoustic signals' energy received by the hydrophones and the temporal changes in water column O-2 concentration as measured by optodes. The results thus show that a simple acoustic acquisition system can be used to monitor the O-2-based productivity of a seagrass meadow at the ecosystem level with high temporal resolution. The finding of a significant production of O-2 as bubbles in seagrass ecosysterns suggests that net primary production is underestimated by methods that rely on the mass balance of dissolved O-2 measurements.

Jesus, Sergio M. (author)
Zabel, Friedrich (author)
Santos, Rui (author)
Silva, Joao (author)
Gobert, Sylvie (author)
Beer, Sven (author)
Björk, MatsStockholms universitet,Institutionen för ekologi, miljö och botanik(Swepub:su)mabjo (author)
Mazzuca, Silvia (author)
Procaccini, Gabriele (author)
Runcie, John W. (author)
Champenois, Willy (author)
Borges, Alberto V. (author)
Stockholms universitetInstitutionen för ekologi, miljö och botanik (creator_code:org_t)

In:Journal of Experimental Marine Biology and Ecology: Elsevier BV464, s. 75-870022-09811879-1697

By the author/editor: Felisberto, Paul ...; Jesus, Sergio M.; Zabel, Friedrich; Santos, Rui; Silva, Joao; Gobert, Sylvie; show more...; Beer, Sven; Björk, Mats; Mazzuca, Silvia; Procaccini, Gabr ...; Runcie, John W.; Champenois, Will ...; Borges, Alberto ...; show less...

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