The research topic:      The investigation and modelling of the marine ecosystems  supplying with energy by photosynthesis

 The People:

Assoc. Prof. Bogdan Woźniak Head of the Marine Physics Department and the Laboratory

Prof. Jerzy Dera Director of the Institute

Dr. Ryszard Hapter

Dr. Mirosława Ostrowska

M.Sc. Sławomir Kaczmarek

M. Sc. Joanna Stoń

 Our works:

We deal with experimental studies and theoretical analysis of radiation fluxes in the sea-atmosphere system. Mainly we are interested in inherent and apparent optical properties of seawater components and their influence on solar energy distribution within water body especially the part of energy utilised in primary production process.
 

We are able to model main radiant energy fluxes in the sea-atmosphere system  (monthly means of 15 energy fluxes for the Southern Baltic region) (Woźniak et al. 1996, Kaczmarek and Dera 1998).

Spatial distribution of solar energy absorbed in water body  in July

In the very centre of our concern are complex models of photosynthesis valid for all types of natural water (Woźniak et al. 1992, Dera 1995, Woźniak et al. 1997, Woźniak and Dera 2000). Such models are elaborated to estimate the primary production quantity by using remote sensing methods and to predict ecosystems functioning. In order to develop the models we are investigating and modelling:
 

light fields in the sea  (sea waters classifications for case 1 water and case 2 water by Woźniak) (Woźniak and Pelevin 1991, Woźniak et al. 1995 Kaczmarek and Woźniak 1995);			Modelled spectra of downward attenuation coefficient
optical properties of marine phytoplankton pigments (model characteristic of the specific absorption Gaussian bands of pigments) (Woźniak and Ostrowska, 1990, Woźniak et al. 1998); (statistical model of marine phytoplankton absorption and fluorescence capacities taking into account acclimation processes, pigment package effects and environmental factor) (Majchrowski and Ostrowska 2000, Woźniak et al. 2000 Majchrowski et al. 2000 Ostrowska et al. 2000a,b)		Specific light absorption by pigments in photosynthetic apparatus of phytoplankton cells
quantum yield of photosynthesis (Woźniak et al. 1992, Woźniak et al. 1997 Ficek et al. 2000a,b).		The Fmax quantum yield of carbon fixation dependence on temperature and inorganic nitrogen concentration

 To achieve these aims we carry out the measurements of light attenuation coefficients, pigments concentration, absorption properties of water seawater components, primary production, fluorescence of phytoplankton photosynthetic apparatus. We have collaborated with scientists from PP Shirshov Institute of Oceanology RAS in Moscow and Department of Biophysics Faculty of Biology Moscow State University (Woźniak, 1991), and others. Our researches are performed within several international projects, e.g. BALTEX, BIOCOLOR.

Literature:

Dera J., 1995, Underwater irradiance as a factor affecting primary production, Dissertations and monographs, 7, Institute of Oceanology PAS, Sopot, 110 pp.;

Ficek D., Majchrowski R., Ostrowska M., Woźniak B., 2000, Influence of non-photosynthetic pigments on the measured quantum yield of photosynthesis, Oceanologia, 42 (2), 231-242;

Ficek D., Ostrowska M., Kuzio M., Pogosyan S. I., 2000, Variability of the portion of functional PS2 reaction centres in the light of fluorometric study, Oceanologia, 42 (2), 243-250;

Kaczmarek S., Woźniak B., 1995, The application of the optical classification of waters in the Baltic Sea investigation (Case 2 waters), Oceanologia 37 (2), 285-297;

Kaczmarek S., Dera J., 1998, Radiation flux balance of the sea-atmosphere system over the Southern Baltic Sea, Oceanologia, 40 (4), 1-30;

Majchrowski R., Ostrowska M., 2000, Influence of photo- and chromatic acclimation on pigment composition in the sea, Oceanologia, 42 (2), 157-175;

Majchrowski R., Woźniak B., Dera J., Ficek D., Kaczmarek S., Ostrowska M., Koblentz-Mishke O. I., 2000, Model of the 'in vivo' spectral absorption of algal pigments. Part 2. Practical applications of the model, Oceanologia, 42 (2), 191-202;

Ostrowska M., Majchrowski R., Matorin D. N., Woźniak B., 2000, Variability of the specific fluorescence of chlorophyll in the ocean. Part 1. Theory of classical `in situ' chlorophyll fluorometry, Oceanologia, 42 (2), 203-219;

Ostrowska M., Matorin D. N., Ficek D., 2000, Variability of the specific fluorescence of chlorophyll in the ocean. Part 2. Fluorometric method of chlorophyll a determination, Oceanologia, 42 (2), 221-229;

Woźniak B., Ostrowska M., 1990, Optical absorption properties of phytoplankton in various seas, Oceanologia, 29, 117-146;

Woźniak B., 1991, Formation of the working group C-1. Application of physical (satellite and fluorescence) methods for studies of marine primary production and marine ecosystem functioning processes, (February 19-21, 1991, Sopot, Poland), Oceanologia, 30, 143-144;

Woźniak B., Pelevin V. N., 1991, Optical classifications of the seas in relation to phytoplankton characteristics, Oceanologia, 31, 25-55;

Woźniak B., Dera J., Koblentz-Mishke O.J., 1992, Modelling the relationship between primary production, optical properties, and nutrients in the sea, in: Ocean Optics XI, SPIE, 1992. v.1750, 246-275;

Woźniak B., Dera J., Semovski S., Hapter R., Ostrowska M., Kaczmarek S., 1995, Algorithm for estimating primary production in the Baltic by remote sensing, SiMO, 68 (8), 91-123;

Woźniak B., Rozwadowska A., Kaczmarek S., Woźniak S. B., Ostrowska M., 1996, Seasonal variability of the solar radiation flux and its utilisation in the South Baltic, Baltic Marine Science Conference, Rönne, Denmark, 21-26 October;

Woźniak B., Dera J., Majchrowski R., Ficek D., Koblentz-Mishke O. I., Darecki M., 1997, IO PAS initial model of marine primary production for remote sensing application, Oceanologia, 39 (4), 377-395;

Woźniak B., Dera J., Ficek D., Majchrowski R., Kaczmarek S., Ostrowska M., Koblentz-Mishke O. I., 1998, Modelling the influence of photo- and chromatic - acclimation on the absorption properties of marine phytoplankton, Ocean Optics Conference, Kailua-Kona, Hawaii, USA, 10-13 November 1998;

Woźniak B., Dera J., 2000, Luminescence and photosynthesis of marine phytoplankton - a brief presentation of new results, Oceanologia,
42 (2), 137-156;

Woźniak B., Dera J., Ficek D., Majchrowski R., Kaczmarek S., Ostrowska M., Koblentz-Mishke O. I., 2000, Model of the `in vivo' spectral absorption of algal pigments. Part 1. Mathematical apparatus, Oceanologia, 42 (2), 177-190.