scholarly journals Intra-annual distribution of Temora longicornis biomass in the Gulf of Gdańsk (the southern Baltic Sea) – numerical simulations

2017 ◽  
Vol 66 (4) ◽  
pp. 256
Author(s):  
L Dzierzbicka-Głowacka ◽  
A Lemieszek ◽  
A Nowicki ◽  
J Piskozub ◽  
E Grinienė ◽  
...  
2019 ◽  
Vol 9 (10) ◽  
pp. 2039
Author(s):  
Lidia Dzierzbicka-Głowacka ◽  
Maja Musialik-Koszarowska ◽  
Marcin Kalarus ◽  
Anna Lemieszek ◽  
Paula Prątnicka ◽  
...  

The main objective of this paper was description of seasonal and interannual trends in secondary production and mortality rates of the three most important Copepoda taxa in the Gulf of Gdańsk (southern Baltic Sea). Samples were collected monthly from six stations located in the western part of the Gulf of Gdańsk during three research periods: 1998–2000, 2006–2007, and 2010–2012. Production was calculated based on copepod biomass and mortality rates estimated according to vertical life table approach. Redundancy analysis was used to investigate relationship between secondary production and environmental conditions. During the entire research period there was significant interannual and seasonal variability of secondary production, mortality rate, as well as abundance and biomass anomalies. Conducted analysis revealed positive correlation between increasing temperature and production of Acartia spp. and Temora longicornis developmental stages, while older copepodites of Pseudocalanus acuspes showed almost negative correlation with temperature. The mortality rate estimations obtained for Acartia spp. were the highest in summer, while Temora longicornis peaked in spring–summer period. The lowest mortality rate estimations were noted in autumn and winter for almost all stages of investigated taxa.


Author(s):  
Małgorzata Leśniewska ◽  
Małgorzata Witak

Holocene diatom biostratigraphy of the SW Gulf of Gdańsk, Southern Baltic Sea (part III)The palaeoenvironmental changes of the south-western part of the Gulf of Gdańsk during the last 8,000 years, with reference to the stages of the Baltic Sea, were reconstructed. Diatom analyses of two cores taken from the shallower and deeper parts of the basin enabled the conclusion to be drawn that the microflora studied developed in the three Baltic phases: Mastogloia, Littorina and Post-Littorina. Moreover, the so-called anthropogenic assemblage was observed in subbottom sediments of the study area.


AMBIO ◽  
2008 ◽  
Vol 37 (2) ◽  
pp. 93-100 ◽  
Author(s):  
Adam Sokołowski ◽  
Krzysztof Pawlikowski ◽  
Maciej Wołowicz ◽  
Pascale Garcia ◽  
Jacek Namieśnik

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