Acoustic monitoring of O-2 production of a seagrass meadow
2015 (English)In: Journal of Experimental Marine Biology and Ecology, ISSN 0022-0981, E-ISSN 1879-1697, Vol. 464, 75-87 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2015. Vol. 464, 75-87 p.
Acoustic data, Oxygen, Primary production, Seagrass
Earth and Related Environmental Sciences Biological Sciences
IdentifiersURN: urn:nbn:se:su:diva-116004DOI: 10.1016/j.jembe.2014.12.013ISI: 000349730500010OAI: oai:DiVA.org:su-116004DiVA: diva2:801863