Influence of microphytobenthos photosynthesis on the spectral characteristics of the signal reflected from Baltic sandy sediments

• Autorzy: Jaśniewicz D. , Gorska N.
• Języki publikacji: EN

Abstrakty

EN

The use of hydracoustical techniques to classify benthic fauna and flora is one of the important challenges in present marine research. It is crucial to understand the microphytobenthos photosynthesis impact on the backscattering properties of the sea floor in the Baltic Sea, where the techniques are actively developed now. This motivated our study. The data used in the analysis was collected in the multiday laboratory experiment conducted in the frame of the grant of the National Science Centre, Poland (No. N306 773940). In this experiment, during changing light conditions (light/dark photocycles), the hydroacoustical backscattering data was acquired in the aquarium with a sandy bottom. The constant temperature and salinity conditions, typical for the Southern Baltic, were kept, and oxygen content was monitored. In this paper data collected at 280 kHz, was processed. It was studied how the energy of echo and power spectral density of the echo signal, are sensitive to the microphytobenthos photosynthesis.

Słowa kluczowe

EN

hydroacoustics; backscattering; microphytobenthos photosynthesis; Baltic Sea

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2016
• Tom: Vol. 19
• Strony: 165--171
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Jaśniewicz D.

• Institute of Oceanology, PAS Powstańców Warszawy 55, 81-712 Sopot, Poland
• Institute of Oceanography, Faculty of Oceanography and Geography, University of Gdańsk, al. Piłsudskiego 46, 81-478 Gdynia, Poland

autor

Gorska N.

Bibliografia

• [1] ICES, Acoustic seabed classification of marine physical and biological landscapes, ICES Cooperative Research Report, No. 286., 1-183, 2007.
• [2] D.V. Holliday, C.F. Greenlaw, J.E.B. Rines, D. Thistle, Diel variations in acoustical scattering from a sandy seabed, Proceedings of the 2004 ICES Annual Science Conference, Vigo, Spain, ICES CM 2004/T:01, 23-38, 2004.
• [3] R.A. Jr. Wildman, M. Huettel, Acoustic detection of gas bubbles in saturated sands at high spatial and temporal resolution, Limnology and Oceanography: Methods, Vol. 10, 129–141, 2012.
• [4] N. Gorska, E. Kowalska-Duda, J.Marszal, J. Schmidt, Z. Klusek, Impact on Microphytobenthos Photosyntesis on the Characteristics of the Echo Signal from Baltic Sandy Sediments, Archives of Acoustics, Vol. 40, No.3, 395-405, 2015.
• [5] P. Stoica, R. Moses, Spectral Analysis of signals, Prentice Hall, New Jersey 2005.
• [6] T.G. Leighton, The Acoustic Bubble, Academic Press., 1997.
• [7] H. Medwin Ocean Acoustics to Acoustical Oceanography, Sounds in the Sea, Cambridge University Press., 194-203, 2005.
• [8] M.A. Ainslie, T.G. Leighton, Review of theory for scattering and extinction crosssections, damping factors and resonance frequencies of spherical gas bubbles, Journal of the Acoustical Society of America, Vol. 130, 3184–3208, 2011.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)