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Can seabirds modify carbon burial in fjords?

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Weslawski J. M., Urbanski J., Gluchowska M., Grzelak K., Kotwicki L., Kwasniewski S., Legezynska J., Wiktor J., Wlodarska-Kowalczuk M., Zaborska A., Zajaczkowski M., Stempniewicz L.

Oceanologia

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2017

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tom 59

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nr 4

Two high latitude fjords of Spitsbergen (Hornsund 77°N and Kongsfjorden 79°N) are regarded as being highly productive (70 g and 50 gC m−2 year−1) and having organic-rich sediments. Hornsund has more organic matter in its sediments (8%), nearly half of it of terrestrial origin, while most of that in Kongsfjorden (5%) comes from fresh, marine sources (microplankton). Analysis of the carbon sources in both fjords shows that a major difference is the much larger seabird population in Hornsund-dominated with over 100 thousands pairs of plankton feeding little auks in Hornsund versus 2 thousand pairs in Kongsfjorden, and marine food consumption estimated as 5573 tonnes of carbon in Hornsund, versus 3047 tonnes in Kongsfjorden during one month of chick feeding period. Seabird colonies supply rich ornithogenic tundra (595 tonnes of C, as against only 266 tonnes of C in the Kongsfjorden tundra). No much of the terrestrial carbon, flushed out or wind-blown to the fjord, is consumed on the seabed – a state of affairs that is reflected by the low metabolic activity of bacteria and benthos and the lower benthic biomass in Hornsund than in Kongsfjorden.

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Good reasons and guidance for mapping planktonic protist distributions

84%

Bulit C.

Acta Protozoologica

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2014

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tom 53

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nr 1 Spec.is. Marine Heterotrophic Protists

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Microplankton size structure induced by a warm-core eddy in the Western Bay of Bengal: Role of Trichodesmium abundance

84%

Chinnadurai K., Retnamma J., Nagarathinam A., Subramanian P. R., Singaram P., Shoba S.

Oceanologia

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2021

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tom 63

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nr 3

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Phytoplankton of two river lakes in relation to flooding period [River Bug, Eastern Poland]

84%

Wojciechowska W., Pasztaleniec A., Solis M., Turczynski M., Dawidek J.

Polish Journal of Ecology

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2005

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tom 53

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nr 3

Studies were carrying out in two shallow (mean depth ≈ 0.3 m) and small (area 2.7–8.2 ha) river lakes, which were flooded by water of River Bug (Eastern Poland) once a year (in spring). The species composition, biomass of phytoplankton and concentration of chlorophyll awere studied. Samples were taken in June (after flooding) and in August (after three months of isolation from river water). About 150 species of phytoplankton were determined. After the flood period phytoplankton biomass was dominated by nannoplankton belonging to Cryptophyceae and Chrysophyceae (strategy-r) and in the stabilization period by microplanktonic green and blue–green algae (strategy-K). The higher biomass and concentration of chlorophyll a values were noted in August than in June. The differentiation of phytoplankton was also stated between near-by stations in both lakes.

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Vertical distribution of phototrophs in the pelagic zone of three small Lobelia lakes

67%

Szelag-Wasielewska E.

Oceanological and Hydrobiological Studies

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2010

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tom 39

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nr 2

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Insights on short-term blooms of planktonic ciliates, provided by an easily recognised genus: Cyrtostrombidium

67%

Bulit C., Macek M., Montagnes D. J. S.

Acta Protozoologica

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2013

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tom 52

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nr 1

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Early spring microplankton development under fast ice covered fjords of Svalbard, Arctic

67%

Wiktor J.

Oceanologia

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1999

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tom 41

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nr 1

Ograniczanie wyników

Can seabirds modify carbon burial in fjords?

Good reasons and guidance for mapping planktonic protist distributions

Microplankton size structure induced by a warm-core eddy in the Western Bay of Bengal: Role of Trichodesmium abundance

Phytoplankton of two river lakes in relation to flooding period [River Bug, Eastern Poland]

Vertical distribution of phototrophs in the pelagic zone of three small Lobelia lakes

Insights on short-term blooms of planktonic ciliates, provided by an easily recognised genus: Cyrtostrombidium

Early spring microplankton development under fast ice covered fjords of Svalbard, Arctic