Winter Tales: the dark side of planktonic life

Błachowiak‐Samołyk, Katarzyna; Wiktor, Józef; Hegseth, Else Nøst; Wold, Anette; Falk‐Petersen, Stig; Kubiszyn, A. M.

doi:10.1007/s00300-014-1597-4

Cited by 38 publications

(35 citation statements)

References 75 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is also a characteristic summer horizontal gradient in the microplankton distribution within the fjord, with flagellates and mixotrophs dominating the turbid waters of the inner basins, while the open outer fjord part is inhabited by larger-sized diatoms and dinoflagellates (Piwosz et al 2009). The highest reported biomass of microplankton ranged from 2.3 g C m -2 in spring (GAME project data) to 2.1 g C m -2 in summer (Piwosz et al 2009 ; Table 3) and dropped down to single cells observed during the winter dark season (Węsławski et al 1990;Wiktor 1999;Berge et al 2015;Błachowiak-Samołyk et al 2015).…”

Section: Primary Producersmentioning

confidence: 99%

Primary producers and production in Hornsund and Kongsfjorden – comparison of two fjord systems

Smoła¹,

Tatarek²,

Wiktor³

et al. 2017

Polish Polar Research

View full text Add to dashboard Cite

Hornsund and Kongsfjorden are two similar-sized Arctic fjords on the West coast of Spitsbergen. They are influenced by cold coastal Arctic water (Hornsund) and warmer Atlantic water (Kongsfjorden). Environmental conditions affect the timing, quantity, spatial distribution (horizontal and vertical) of spring and summer blooms of protists as well as the taxonomic composition of those assemblages. Here, we compile published data and unpublished own measurement from the past two decades to compare the environmental factors and primary production in two fjord systems. Kongsfjorden is characterized by a deeper euphotic zone, higher biomass and greater proportion of autotrophic species. Hornsund seems to obtain more nutrients due to the extensive seabird colonies and exhibits higher turbidity compared to Kongsfjorden. The annual primary production in the analysed fjords ranges from 48 g C m -2 y -1 in Kongsfjorden to 216 g C m -2 y -1 in Hornsund, with a dominant component of microplankton (90%) followed by macrophytes and microphytobenthos.

show abstract

Section: Primary Producersmentioning

confidence: 99%

Primary producers and production in Hornsund and Kongsfjorden – comparison of two fjord systems

Smoła¹,

Tatarek²,

Wiktor³

et al. 2017

Polish Polar Research

View full text Add to dashboard Cite

show abstract

“…-The abundance data for the different developmental stages of the dominant copepod species and other zooplankton were converted to the number of individuals in 1 m 3 and displayed graphically. There were no statistically significant differences between day and night abundances and sizes (data not shown) within either the MPS or the MIK samples, so the values from each sampling stratum were averaged separately for the MPS ( It was confirmed by our data that two MPS sampling stations located ~30 km apart were similar concerning bottom depth, water masses distribution and assemblages of zooplankton, so we decided to present obtained results as mean zooplankton abundances from both MPS 1 and MPS 2 stations following the pattern published in Błachowiak-Samołyk et al (2015).…”

Section: Methodsmentioning

confidence: 77%

“…Previously, Webster et al (2015) published the MIK data from the same cruise, along with multifrequency acoustics, to describe the vertical distribution of macrozooplankton biomass over a diel cycle, while MPS data have been presented for biomass comparison of protist and mesozooplankton in two contrasting locations: a shallow Rijpfjorden and a deep ice-covered region of Sofiadjupet (Błachowiak-Samołyk et al 2015).…”

Section: Methodsmentioning

confidence: 99%

“…Although there have been a few recent investigations of the mesozooplankton communities in the European Arctic during wintertime (e.g. Daase et al 2014;Grigor et al 2014;Båtnes et al 2015;Błachowiak-Samołyk et al 2015;Lischka and Hagen 2016) and some macrozooplankton (e.g., Søreide et al 2003;Zhukova et al 2009;Webster et al 2015;Grenvald et al 2016;Bandara et al 2016) more comprehensive data on a broader spectrum of zooplankton size fractions is needed if our current level of understanding continues to be based solely on data for the more abundant and readily sampled size fractions (e.g. mesozooplankton).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Characterisation of large zooplankton sampled with two different gears during midwinter in Rijpfjorden, Svalbard

Błachowiak‐Samołyk¹,

Zwolicki²,

Webster³

et al. 2017

Polish Polar Research

Self Cite

View full text Add to dashboard Cite

During a midwinter cruise north of 80 o N to Rijpfjorden, Svalbard, the composition and vertical distribution of the zooplankton community were studied using two different samplers 1) a vertically hauled multiple plankton sampler (MPS; mouth area 0.25 m², mesh size 200 μm) and 2) a horizontally towed Methot Isaacs Kidd trawl (MIK; mouth area 3.14 m², mesh size 1500 μm). Our results revealed substantially higher species diversity (49 taxa) than if a single sampler (MPS: 38 taxa, MIK: 28) had been used. The youngest stage present (CIII) of Calanus spp. (including C. finmarchicus and C. glacialis) was sampled exclusively by the MPS, and the frequency of CIV copepodites in MPS was double that than in MIK samples. In contrast, catches of the CV-CVI copepodites of Calanus spp. were substantially higher in the MIK samples (3-fold and 5-fold higher for adult males and females, respectively). The MIK sampling clearly showed that the highest abundances of all three Thysanoessa spp. were in the upper layers, although there was a tendency for the larger-sized euphausiids to occur deeper. Consistent patterns for the vertical distributions of the large zooplankters (e.g. ctenophores, euphausiids) collected by the MPS and MIK samplers provided more complete data on their abundances and sizes than obtained by the single net. Possible 460mechanisms contributing to the observed patterns of distribution, e.g. high abundances of both Calanus spp. and their predators (ctenophores and chaetognaths) in the upper water layers during midwinter are discussed.

show abstract

“…In another study, Falk-Petersen et al (2014) were able to relate the absence of ice and prevailing wind directions with a pronounced upwelling along the continental slope North of Svalbard. This upwelling event, driven by the combination of little ice and easterly winds, is hypothesised to create a similar condition to those that once supported the large stocks of bowhead whales before they were hunted to near extinction in the late 1700s (FalkPetersen et al 2014).…”

Section: Highlights and Outlookmentioning

confidence: 93%

Introduction to the special issue on polar night studies conducted onboard RV Helmer Hanssen in the Svalbard area

Lønne¹,

Falk‐Petersen

Berge

2014

Polar Biol

Self Cite

View full text Add to dashboard Cite

Winter Tales: the dark side of planktonic life

Cited by 38 publications

References 75 publications

Primary producers and production in Hornsund and Kongsfjorden – comparison of two fjord systems

Primary producers and production in Hornsund and Kongsfjorden – comparison of two fjord systems

Characterisation of large zooplankton sampled with two different gears during midwinter in Rijpfjorden, Svalbard

Introduction to the special issue on polar night studies conducted onboard RV Helmer Hanssen in the Svalbard area

Contact Info

Product

Resources

About