Wyniki wyszukiwania - BazTech

1

The structure of macrozoobenthic communities as an environmental status indicator in the Gulf of Gdańsk (the Outer Puck Bay)

Warzocha J., Gromisz S., Wodzinowski T., Szymanek L.

Oceanologia

|

2018

|

No. 60 (4)

553--559

EN

An attempt is made to use long-term (1979-2014) macrobenthos data series to derive insights on changes in abiotic conditions and on potential effects of long-term macrobenthos variability on food availability for fish and wintering waterfowl. The data were collected from a small embayment, protected as a NATURA 2000 area, functioning as a fishing ground important for the local community and as a site of diverse commercial developments. The analysis showed a drastic reduction of the macrobenthos abundance and biomass, which could have been related to oxygen deficiency; on the other hand, recolonisation processes have also been observed.

2

Bacterial community structure influenced by Coscinodiscus sp. in the Vistula river plume

Ameryk A., Hahnke R. L., Gromisz S., Kownacka J., Zalewski M., Szymanek L., Całkiewicz J., Dunalska J., Harder J.

Oceanologia

|

2014

|

No. 56 (4)

825--856

EN

The Gulf of Gdańsk is influenced by freshwater inflow from the River Vistula and by a wind-driven current along the coast. Bacterial communities from five stations along a salinity gradient were sampled during one day and analysed by terminal restriction fragment length polymorphism (T-RFLP), catalysed reporter deposition-fluorescence in situ hybridisation (CARD-FISH) and 16S rRNA gene libraries. On the day of sampling, we observed a probable current-driven seawater influx into the inner part of the gulf that separated the gulf into distinct water bodies. Members of the diatom Coscinodiscus sp. dominated one of these water bodies and influenced the bacterial community. The coexistence of typically freshwater and marine bacterioplankton populations in the Vistula river plume suggested an integration of some freshwater populations into the Baltic Sea bacterioplankton.

3

The impact of the River Odra on the phytoplankton composition and biomass in the Pomeranian Bay

Gromisz S., Witek Z., Mackiewicz T.

Oceanologia

|

1999

|

No. 41 (3)

403-427

EN

The article is based on the analysis of phytoplankton samples collected in the Pomeranian Bay during five cruises in the years 1993, 1996 and 1997. In each season a number of phytoplankton assemblages were formed under the impact of the hydrological and hydrochemical conditions gradually changing along an axis from the outlets of the Szczecin Lagoon towards the open sea. The most distinct assemblages could be described as "river-mouth", "open-Bay"and "open-sea" assemblages. The highest phytoplankton biomass was noted near the mouth of the Swina Strait in the "river-mouth" assemblages, where the concentration of chlorophyll a was 4 to 5 five times higher in comparison with the "open-sea" values. The phytoplankton biomass in the "open-Bay" assemblages was roughly twice as high as that in the 'open-sea' assemblages. Because of the high N:P ratio in the Odra waters, phosphorus was very probably the factor limiting phytoplankton primary production in the Pomeranian Bay during periods of intensified inflow of riverine waters. The species dominating the phytoplankton of the Pomeranian Bay during the present study were found to be the same as those recorded in this region 40 years earlier.

4

Photosynthetic light curves in the Pomeranian Bay

Renk H., Ochocki S., Chmielowski H., Gromisz S., Nakonieczny J., Pastuszak M., Zalewski M.

Oceanologia

|

1999

|

No. 41 (3)

355-371

EN

Photosynthetic light curves at selected stations in the Pomeranian Bay were determined during four cruises undertaken in March and July 1996, and in May and October 1997. The mean assimilation numbers measured in particular seasons were as follows: spring - 2.46 mgC mgChl-1 h-1, summer - 3.99 mgC mgChl-1 h-1, autumn - 3.24 mgC mgChl-1 h-1 and winter - 2.17 mgC mgChl-1 h-1. A significant correlation was found between the assimilation number and water temperature over the entire period of study. In some seasons a dependence between the assimilation number and nutrient concentrations was also noted. Assimilation numbers in the areas adjacent to the Odra river months were higher than in the offshore zone.