Joanna Stoń-Egiert

Joanna Stoń-Egiert
Polish Academy of Sciences | PAN · Marine Physics Department

About

32
Publications
5,485
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711
Citations
Citations since 2017
11 Research Items
358 Citations
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
2017201820192020202120222023020406080
Introduction
Skills and Expertise

Publications

Publications (32)
Article
The changes in phytoplankton pigment compositions and concentrations during a 20-year period of exploration of the Baltic Sea have been analysed. Both chlorophylls and carotenoids are characterized in the context of their monthly variations in the Gulf of Gdańsk and the open waters of southern Baltic Sea. It is assumed that pigment compositions are...
Article
This paper reports on detailed studies of the relationship between the inherent optical properties (IOPs) of suspended particulate matter populations occurring in southern Baltic Sea waters, and the basic biogeochemical and morphological quantities enabling these populations to be generally characterized. Specifically, these IOPs are the spectral a...
Article
The aim of the work is to present the possibilities of using advanced systems combining data obtained by remote sensing methods with data from other sources and bio-optical models for tracking and analyzing long-term changes in marine ecosystems. For this purpose, the 2010–2019 primary production data set provided by the SatBałtyk System, a platfor...
Article
Full-text available
The seasonal and spatial variability of primary production (PP) measured using ¹⁴ C method in two regions: open waters of the Baltic Sea and the Gulf of Gdansk were discussed. The statistical analyses of 26-years dataset (from 1993 to 2018) allow to confirm some regularities of productivity and find some features resulting mainly from changing envi...
Article
Full-text available
A number of methods for indirectly estimating the size structure of the phytoplankton population in the Baltic Sea were analysed. These analyses were based on ~1000 samples of phytoplankton pigment concentrations and light absorption coefficients taken from surface waters, mainly in the southern Baltic Sea. Standard reference methods of diagnostic...
Article
Full-text available
Potential influences of various environmental factors (light conditions, mixed layer depth, water temperature) on growth rates of different cyanobacteria in the Baltic Sea (BS) are discussed. Growth rates were modeled as a function of quanta absorbed by phytoplankton. This in turn depends on phytoplankton exposition to light, which we simulated to...
Article
Full-text available
This paper presents approximate formulas (empirical equations) for parameterizing the coefficient of light absorption by phytoplankton aph(λ) in Baltic Sea surface waters. Over a thousand absorption spectra (in the 350–750nm range), recorded during 9 years of research carried out in different months of the year and in various regions of the souther...
Poster
Full-text available
The poster presents approximate formulas (empirical equations) for parameterizing the coefficients of light absorption by phytoplankton, aph, in Baltic Sea surface waters. Over a thousand absorption spectra (in the 350-750 nm range), recorded during nine years of research carried out in different months of the year and in various regions of the sou...
Article
Full-text available
Mathematical formulas are given to describe the changes with depth of concentrations of chlorophylls b, c, and photosynthetic and photoprotecting carotenoids in Baltic phytoplankton resulting from the adaptation of algal cells to ambient conditions. They take into account the spectral variability and differences in intensity, characteristic of the...
Article
Full-text available
The paper presents approximate formulas for parameterizing the coefficient of light absorption by phytoplankton aph(λ) in Baltic Sea surface waters. Over a thousand absorption spectra (in the 350–750nm range), recorded during nine years of research carried out in different months of the year and in various regions of the southern and central Baltic...
Article
The empirical relationships were examined of spectral characteristics of light scattering and backscattering by particles suspended in seawater in relation to the dry mass concentration of particles and the bulk proportions of their organic and inorganic fractions. The analyses were based on empirical data collected in the surface waters of the sou...
Article
This paper analyses the relationships between the light absorption coefficients at 440 nm ap(440) for particles suspended in the surface waters of the southern Baltic Sea and the concentrations of some optically significant constituents in these waters. The analysis covers two main groups of particles: phytoplankton and non-algal. For this purpose...
Article
Full-text available
The optical properties, i.e., absorption and scattering spectra of ten strains of cyanobacteria from the Baltic Sea and Pomeranian lakes (Aphanizomenon flos-aquae KAC 15, Microcystis aeruginosa CCNP 1101, Anabaena sp. CCNP 1406, Synechocystis salina CCNP 1104, Phormidium sp. CCNP 1317, Nodularia spumigena CCNP 1401, Synechococcus sp. CCNP 1108, Nos...
Article
The paper addresses the seasonal variability of coefficients of light absorption by suspended particulate matter ap(λ) in different regions of the Baltic Sea: open-sea waters, coastal waters, the Gulf of Gdańsk, the Pomeranian Bay and river mouths. We analysed 865 spectra of light absorption by phytoplankton aph(λ) and non-algal particles aNAP(λ) i...
Conference Paper
Full-text available
Przeanalizowano zależności pomiędzy współczynnikami absorpcji światła o długości fali 440 nm, a p (440) przez cząstki zawieszone w powierzchniowej warstwie wód południowego Bałtyku i stężeniami wybranych, optycznie istotnych składników tych wód. Analizy przeprowadzono uwzględniając dwie główne grupy zawiesin: fitoplankton oraz cząstki niefitoplankt...
Article
The paper analyses the reliability of fluorimetric methods for determining chlorophyll concentrations in the sea using a submersible fluorimeter. To this end, such concentrations were measured with a bbe FluoroProbe spectrofluorimeter as well as standard methods in a range of Baltic basins of different trophic index. This analysis shows that fluori...
Article
Full-text available
Phycobilins are an important group of pigments that through complementary chromatic adaptation optimize the light-harvesting process in phytoplankton cells, exhibiting great potential as cyanobacteria species biomarkers. In their extracted form, concentrations of these water-soluble molecules are not easily determined using the chromatographic meth...
Conference Paper
Full-text available
SatBaltic (Satellite Monitoring of the Baltic Sea Environment) project is being realized in Poland by the SatBaltic Scientific Consortium, specifically appointed for this purpose, which associates four scientific institutions: the Institute of Oceanology PAN in Sopot -coordinator, the University of Gdańsk (Institute of Oceanography), the Pomeranian...
Conference Paper
Full-text available
The main aim of the five-year SatBałtyk (2010–2014) research project (Satellite Monitoring of the Baltic Sea Environment) is to prepare the technical infrastructure and set in motion operational procedures for the satellite monitoring of the Baltic environment. This system is to characterize on a routine basis the structural and functional properti...
Article
Full-text available
В 2004–2008 гг. поглощательные характеристики фитопланктона были измерены в 15 озерах северной Польши различной продуктивности одновременно с концентрацией оптически активных веществ. Эти данные были использованы для проверки модели поглощательных свойств фитопланктона, предложенной Брико и др. для океанских вод типа 1 (в дальнейшем называемой пара...
Article
Full-text available
This article is the first of two papers on the remote sensing methods of monitoring the Baltic ecosystem, developed by a Polish team. The main aim of the five- year SatBałtyk (2010–2014) research project (Satellite Monitoring of the Baltic Sea Environment) is to prepare the technical infrastructure and set in motion operational procedures for the s...
Article
Full-text available
This paper is the second part of the description of the first stage of the SatBałtyk project’s implementation. Part 1 (Woźniak et al. 2011, in this issue) presents the assumptions and objectives of SatBałtyk and describes the most important stages in the history of our research, which is the foundation of this project. It also discusses the operati...
Article
Full-text available
The inherent optical properties (IOPs) of suspended particulate matter and their relations with the main biogeochemical characteristics of particles have been examined in the surface waters of the southern Baltic Sea. The empirical data were gathered at over 300 stations in open Baltic Sea waters as well as in the coastal waters of the Gulf of Gdań...
Conference Paper
Full-text available
The paper describes the results of the first stage in the formation of monitoring system for the Baltic, based on the remote sensing data; this is being done in Poland within the framework of the large-scale SatBaltic project. A block diagram of the System and distribution maps of a number of parameters of the Baltic environment are given
Article
Full-text available
Mathematical expressions were derived describing the distribution and concentration of individual phytoplankton pigments with respect to biotic factors in the southern Baltic. Relationships wereestablished between the chlorophyll a concentration and the total phytoplankton biomass (represented by the organic carbon content), as well as between the...
Article
Full-text available
This article is the first in a series of three describing the modelling of the vertical different photosynthetic and photoprotecting phytoplankton pigments concentration distributions in the Baltic and their interrelationsdescribed by the so-called non-photosynthetic pigment factor.The model formulas yielded by this research are an integral part of...
Article
Full-text available
This is the second in a series of articles, the aim of which is to derive mathematical expressions describing the vertical distributions of the concentrations of different groups of phytoplankton pigments; these expressions are necessary in the algorithms for the remote sensing of the marine ecosystem. It presents formulas for the vertical profiles...
Article
Full-text available
The community of aerobic anoxygenic phototrophs was investigated in the Baltic Sea using infrared epifluorescence microscopy from September 2004 to October 2005. The majority of these bacteriochlorophyll-containing organisms exhibited a specific sickle-shaped morphology, with rods or other morphotypes observed only occasionally. Aerobic anoxygenic...
Article
Chromophoric dissolved organic matter (CDOM) is the major light absorber in the Baltic Sea. In this study, excitation emission matrix (EEM) fluorescence spectra and UV-visible absorption spectra of CDOM are reported as a function of salinity. Samples from different locations and over different seasons were collected during four cruises in 2002 and...
Article
In the experiment reported the results obtained with two different columns for the RP-HPLC analysis of phytoplankton pigment components were compared. LiChroCART Hypersil ODS and LiChroCART LiChrospher100 RP18e columns were used exchangeably. Two groups of high-purity pigment standards of reference phytoplankton strains (23 chlorophylls and caroten...
Article
Aerobic anoxygenic phototrophs were recently found to constitute a significant portion of the marine microbial community. These bacteria use bacteriochlorophyll-containing reaction centers to perform photoheterotrophic metabolism. A new instrument for routine measurements of both chlorophyll a and bacteriochlorophyll a was used for monitoring anoxy...
Article
Full-text available
Analysed by differential spectroscopy, 1208 empirical spectra of light absorption a<sub>pl</sub> (λ) by Baltic phytoplankton were spectrally decomposed into 26 elementary Gaussian component bands. At the same time the composition and concentrations of each of the 5 main groups of pigments (chlorophylls a , chlorophylls b , chlorophylls c , photosyn...

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Projects

Projects (3)
Project
Project funded by the National Science Centre, Poland; implemented in the years 2020-2024. The main goal of the project is to precisely characterize the variability of the inherent optical properties (IOPs) of seawater in selected fjords of western Spitsbergen, in relation to the concentration, composition and size distribution of the suspended particulate matter populations found in these waters.
Project
Project financed by the National Science Centre, Poland, implemented in 2017-2021. The main goal of the project is to perform advanced research and to formulate precise mathematical and statistical description of the complex relationships between optical properties and main biogeochemical and physical properties of suspended particulate matter in the southern Baltic Sea.
Project
The main aim of the SatBałtyk research project (Satellite Monitoring of the Baltic Sea Environment) is to prepare the technical infrastructure and set in motion operational procedures for the satellite monitoring of the Baltic environment. This system is to characterize on a routine basis the structural and functional properties of this sea on the basis of data supplied by the relevant satellites. The characterization and large-scale dissemination of the following properties of the Baltic is anticipated: the solar radiation influx to the sea's waters in various spectral intervals, energy balances of the short- and long-wave radiation at the Baltic Sea surface and in the upper layers of the atmosphere over the Baltic, sea surface temperature distribution, dynamic states of the water surface, concentrations of chlorophyll a and other phytoplankton pigments in the Baltic water, distributions of algal blooms, the occurrence of upwelling events, and the characteristics of primary organic matter production and photosynthetically released oxygen in the water. It is also intended to develop and, where feasible, to implement satellite techniques for detecting slicks of petroleum derivatives and other compounds, evaluating the state of the sea's ice cover, and forecasting the hazards from current and future storms and providing evidence of their effects in the Baltic coastal zone. The ultimate objective of the project is to implement an operational system for the routine determination and dissemination on the Internet of the above-mentioned features of the Baltic in the form of distribution maps as well as plots, tables and descriptions characterizing the state of the various elements of the Baltic environment. See more: http://satbaltyk.iopan.gda.pl/