Wyniki wyszukiwania

1

Changes in the phytoseston of a river-lake system in Drawienski National Park

100%

Goldyn R., Szelag-Wasielewska E.

Oceanological and Hydrobiological Studies

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2004

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tom 33

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nr 2

2

Trophic status of lake water evaluated using phytoplankton community structure - change after two decades

100%

Szelag-Wasielewska E.

Polish Journal of Environmental Studies

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2006

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tom 15

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nr 1

Phytoplankton composition and biomass were studied in a small suburban lake within the city of Poznań (western Poland) on the basis of water samples taken in epilimnion. Results obtained in 1999 were compared with the first study period, of 1978. In the first period, 100 phytoplankton taxa were found and diatoms were the largest group of species (29% of all taxa), while in the second period 117 phytoplankton taxa were recorded and green algae dominated (50%). The mean phytoplankton biomass increased nearly 2-fold over the two decades and the trophic state index was higher in 1999. Picophytoplankton, whose seasonal fluctuations were analyzed only in 1999, accounted for 0.6% to 31.5% (mean 12.8%) of total phytoplankton biomass.

3

Trophic state assessment based on late summer phytoplankton community structure: a case study for epilimnetic lake water

100%

Szelag-Wasielewska E.

Oceanological and Hydrobiological Studies

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2007

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tom 36

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nr 3

4

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Mathematical description of vertical algal accessory pigment distributions in oceans – a brief presentation

71%

Majchrowski R., Ostrowska M.

Oceanologia

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2009

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tom 51

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nr 4

A straightforward mathematical expression for describing the vertical distributions of algal accessory pigments in oceans is presented. To this end ca 1500 empirical datasets of accessory pigment depth profiles gathered during some 200 research cruises in different oceanic regions were analysed. These data were retrieved from the bio-optical databases of SeaBASS and U.S. JGOFS published on the Internet. The statistical relationships were analysed between the concentrations of accessory pigments and the trophic indices of waters, as measured by the surface concentrations of chlorophyll a and the optical depths in different oceanic regions. A mathematical expression was established and formulas based on it were found, approximating the relations between the vertical distributions of accessory pigments and the chlorophyll a concentration. These formulas can be used to model the species composition of algae in different parts of the ocean and in remote sensing algorithms.

5

Wplyw rekultywacji na trofie jeziora srodmiejskiego

51%

Paturej E.

Acta Scientiarum Polonorum. Formatio Circumiectus

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2008

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tom 07

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nr 1

3-12

Ograniczanie wyników

2 Oceanological and Hydrobiological Studies

1 Acta Scientiarum Polonorum. Formatio Circumiectus

1 Oceanologia

1 Polish Journal of Environmental Studies

3 Szelag-Wasielewska E.

1 Goldyn R.

1 Majchrowski R.

1 Ostrowska M.

1 Paturej E.

1 2009

1 2008

1 2007

1 2006

1 2004

Changes in the phytoseston of a river-lake system in Drawienski National Park

Trophic status of lake water evaluated using phytoplankton community structure - change after two decades

Trophic state assessment based on late summer phytoplankton community structure: a case study for epilimnetic lake water

Mathematical description of vertical algal accessory pigment distributions in oceans – a brief presentation

Wplyw rekultywacji na trofie jeziora srodmiejskiego