On diel variability of marine sediment backscattering properties caused by microphytobenthos photosynthesis: impact of environmental factors
Natalia Gorska , Ewa Kowalska-Duda , Filip Pniewski , Adam Latała
AbstractThe study has been motivated by the development of the hydroacoustic techniques for mapping and classifying the benthic habitats and for the research of the microbenthos photosynthesis in the semi-enclosed Baltic Sea, particularly sensitive to human activity. The investigation of the effect of the benthic microalgal photosynthesis on the echo signal from the Baltic sandy sediments is continuing. The study clarifies the impact of the abiotic and biotic factors on the diel variation of the backscattering caused by the benthic microalgal photosynthetic activity. Five multiday laboratory experiments, different in hydrophysical or biological conditions, were conducted. During each measurement series, the “day” (illumination) and “night” (darkness) conditions (L:D cycle) were simulated and the diel variations of the echo energy of the backscattered signal were analyzed. The hydroacoustic data were acquired along with measuring biological and biooptical parameters and oxygen concentration. The study demonstrated the impact of microphytobenthos photosynthesis on the backscattering properties of the marine sediment which is sensitive to the illumination level, benthic microalgal biomass and macrozoobenthos bioturbation.
|Journal series||Journal of Marine Systems, ISSN 0924-7963, (A 40 pkt)|
|Publication size in sheets||0.5|
|Keywords in English||acoustic data, bottom scattering, phytobenthos, photosynthesis, effects on seabed backscattering properties, impact of biotic and abiotic factors|
|ASJC Classification||; ;|
|Score||= 40.0, 28-01-2020, ArticleFromJournal|
|Publication indicators||= 1; : 2018 = 1.25; : 2018 = 2.539 (2) - 2018=2.838 (5)|
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