Protozoan communities in the Vistula River estuary (Baltic Sea)

• Autorzy: Rychert K. , Kownacka J. , Wielgat-Rychert M. , Pluto-Pradzynska A.

Warianty tytułu

Zbiorowiska pierwotniaków w estuarium Wisły (Morze Bałtyckie)

• Języki publikacji: EN

Abstrakty

EN

Protozoan communities (heterotrophic nanoflagellates, dinoflagellates, and ciliates) were studied along the Vistula River estuary (southern Baltic Sea) in June 2005. Protozoan biomass ranged from 64.1 to 162 μgC l-1 close to the river mouth and decreased to 20.7 μgC l-1 at the most offshore station. The negative correlation between distance from the mouth and protozoan biomass was highly statistically significant. Within the estuary, the majority of the biomass was contributed by heterotrophic dinoflagellates and Ebria tripartita (71% on average), whereas heterotrophic nanoflagellates and ciliates contributed 22% and 7% of the protozoan biomass, respectively. At the offshore station, the contribution of heterotrophic dinoflagellates decreased to typical value of 25%. The study confirmed elevated significance of heterotrophic dinoflagellates and E. tripartita in the Gulf of Gdańsk. Correlation analysis revealed that all groups of protozoa were significantly and positively related to phytoplankton biomass or primary production, but only heterotrophic ciliates were related to bacterial secondary production.

PL

Zbiorowiska pierwotniaków (heterotroficzne wiciowce, bruzdnice i orzęski) badano wzdłuż estuarium rzeki Wisły (Bałtyk Południowy). Badania przeprowadzono po wiosennym zakwicie fitoplanktonu, pobierając próby z wód powierzchniowych. Biomasa pierwotniaków wynosiła 64,1-162 μgC l-1 blisko ujścia rzeki i stopniowo spadała do 20,7 μgC l-1 na najbardziej wysuniętym w morze stanowisku (64,3 mil morskich od ujścia rzeki). Zaobserwowana zależność pomiędzy odległością od ujścia a biomasą pierwotniaków była wysoce istotna statystycznie. W obrębie estuarium większość biomasy zbiorowiska pierwotniaków (średnio 71%) stanowiły heterotroficzne bruzdnice (razem z Ebria tripartita), podczas gdy heterotroficzne wiciowce i orzęski osiągały odpowiednio 22% i 7% całkowitej biomasy pierwotniaków. Na najbardziej wysuniętym w morze stanowisku udział heterotroficznych bruzdnic do biomasy spadał do 25%, co jest wartością typową, ponieważ w wodach morskich trzy wymienione grupy pierwotniaków zwykle wykazują porównywalną biomasę. Badania potwierdziły szczególnie duże znaczenie heterotroficznych bruzdnic i Ebria tripartita w Zatoce Gdańskiej i wykazały, że ma to związek z napływem wód wnoszonych przez Wisłę. Analiza statystyczna wykazała, że wszystkie grupy pierwotniaków były powiązane z biomasą fitoplanktonu lub wielkością produkcji pierwotnej, podczas gdy tylko heterotroficzne orzęski wykazały istotną korelację z wielkością produkcji wtórnej bakterioplanktonu.

• Wydawca: -
• Czasopismo: Baltic Coastal Zone. Journal of Ecology and Protection of the Coastline
• Rocznik: 2014
• Tom: 18
• Opis fizyczny: p.39-53,fig.,ref.

Twórcy

autor

Rychert K.

• Department of Ecology, Pomeranian University in Slupsk, Arciszewskiego 22b, 76-200 Slupsk, Poland

autor

Kownacka J.

• Department of Fisheries Oceanography and Marine Ecology, National Marine Fisheries Research Institute, Kollataja 1, 81-332 Gdynia, Poland

autor

Wielgat-Rychert M.

• Department of Ecology, Pomeranian University in Slupsk, Arciszewskiego 22b, 76-200 Slupsk, Poland

autor

Pluto-Pradzynska A.

• Department of Ecology, Pomeranian University in Slupsk, Arciszewskiego 22b, 76-200 Slupsk, Poland

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