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Acoustic monitoring of O2 production of a seagrass meadow
Felisberto, P; Jesus, M; Zabel, F; Santos, R; Silva, J; Gobert, S.; Beer, S; Bjork, M; Mazzuca, S; Procaccini, G; Runcie, W; Champenois, W.; Borges, A.V. (2015). Acoustic monitoring of O2 production of a seagrass meadow. J. Exp. Mar. Biol. Ecol. 464: 75-87. dx.doi.org/10.1016/j.jembe.2014.12.013
In: Journal of Experimental Marine Biology and Ecology. Elsevier: New York. ISSN 0022-0981, more
Peer reviewed article  

Available in Authors 
    VLIZ: Open Repository 278900 [ OMA ]

Keywords
    Posidonia oceanica (Linnaeus) Delile, 1813 [WoRMS]; Marine
Author keywords
    Acoustic data; Oxygen; Primary production; Seagrass

Authors  Top 
  • Felisberto, P.
  • Jesus, M
  • Zabel, F
  • Santos, R
  • Silva, J
  • Gobert, S., more
  • Beer, S.
  • Bjork, M.
  • Mazzuca, S.
  • Procaccini, G
  • Runcie, W
  • Champenois, W., more
  • Borges, A.V., more

Abstract
    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 (O2) 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 6.5–8.5 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 O2 concentration as measured by optodes. The results thus show that a simple acoustic acquisition system can be used to monitor the O2-based productivity of a seagrass meadow at the ecosystem level with high temporal resolution. The finding of a significant production of O2 as bubbles in seagrass ecosystems suggests that net primary production is underestimated by methods that rely on the mass balance of dissolved O2 measurements.

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