Physical and biological characteristics of the pelagic system across Fram Strait to Kongsfjorden

Hop, Haakon; Falk‐Petersen, Stig; Svendsen, Harald; Kwaśniewski, Sławomir; Pavlov, Vladimir; Pavlova, Olga; Søreide, Janne E.

doi:10.1016/j.pocean.2006.09.007

Cited by 256 publications

(199 citation statements)

References 241 publications

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“…4). The results conWrm earlier suggestions that (Kwasniewski et al 2010;Jakubas et al 2011;own unpublished data), which occurs in large concentrations only close to the sea ice (Hop et al 2000(Hop et al , 2006.…”

Section: Discussionsupporting

confidence: 90%

Foraging by little auks in the distant marginal sea ice zone during the chick-rearing period

et al. 2011

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During the chick-rearing period, little auks Alle alle adopt a bimodal foraging strategy, alternating long trips with several short ones. It has been postulated that they reach more remote areas during long feeding trips than during short ones. However, the range of their foraging Xights has never actually been measured. The aims of this study were to Wnd the exact location of the little auk feeding grounds and to investigate whether they reach remote areas during long foraging trips using miniature GPS and temperature loggers. The study was conducted in 2009 in Magdalenefjorden (79°34ЈN, 11°04ЈE), one of the main breeding grounds of little auks on Spitsbergen. The temperature logger records indicated that during short trips, little auks visit warmer waters (situated close to the colony) than during long ones. The tracks of two GPS-equipped birds indicated that during long trips little auks foraged in the distant, foodabundant marginal sea ice zone, at least 100 km away from the colony. During long trips, birds make several stops at sea, perhaps sampling the foraging area with respect to prey distribution. Since food conditions near the studied colony are usually suboptimal, little auks may be exploiting distant feeding areas to compensate for the poorer-quality food available at nearby foraging grounds. The extended duration of long foraging trips may enable birds to collect food for chicks on food-abundant, remote foraging grounds as well as acquire, process and excrete food needed for selfmaintenance, reducing the costs of Xight to the colony.

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Section: Discussionsupporting

confidence: 90%

Foraging by little auks in the distant marginal sea ice zone during the chick-rearing period

et al. 2011

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“…Most of the heat and mass exchange between the North Atlantic and the Arctic Ocean occur through the Fram Strait because it is the passageway through which freshwater and sea ice are exported southward and warm saline waters are transported northward. The pelagic community structure is strongly influenced by the Atlantic water inflow and the sea-ice extent in this region (Hop et al 2006). Diatoms dominate the spring bloom and the primary production on an annual basis (Hop et al 2006).…”

Section: Methodsmentioning

confidence: 99%

Crenarchaea and phytoplankton coupling in sedimentary archives: Common trigger or metabolic dependence?

Fietz

Martínez‐García

Rueda

et al. 2011

Limnology & Oceanography

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The concentrations of chlorins (chlorophyll transformation products indicative of phytoplankton production) and crenarchaeol (a marker for Crenarchaea abundance) are significantly positively correlated (Spearman's rank correlation coefficient r s . 0.75) in four core records from freshwater (Lake Baikal) and marine settings (Southern, Atlantic, and Arctic Oceans). This suggests a close relationship between Crenarchaea abundance and phytoplankton production. Degradation and transport mechanisms, as well as a common environmental trigger, may in part account for our observations, but these mechanisms alone cannot fully explain them. Instead our findings point to a metabolic dependence of Crenarchaea on resources released by phytoplankton, such as organic carbon or ammonium.

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“…The sea ice pack, drifting with the Sørkapp Current from Storfjorden and the Barents Sea, occasionally enters Hornsund and may remain until July (Styszyńska and Kowalczyk 2007;Styszyńska and Rozwadowska 2008;Styszyńska 2009). The formation of fast ice was also a regular phenomenon in Kongsfjorden in the past, but in recent years, the fast ice has been forming only in the inner, most sheltered bay (Nicolaus et al 2003;Hop et al 2006;Gerland et al 2008;Dieckmann et al 2010;Berge et al 2015), and compared to Hornsund, it covers a much smaller part of the fjord surface (Table 2).…”

Section: Study Ar Eamentioning

confidence: 99%

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

Smoła¹,

Tatarek²,

Wiktor³

et al. 2017

Polish Polar Research

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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.

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Physical and biological characteristics of the pelagic system across Fram Strait to Kongsfjorden

Cited by 256 publications

References 241 publications

Foraging by little auks in the distant marginal sea ice zone during the chick-rearing period

Foraging by little auks in the distant marginal sea ice zone during the chick-rearing period

Crenarchaea and phytoplankton coupling in sedimentary archives: Common trigger or metabolic dependence?

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

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