Microzooplankton along a transect from northern continental Norway to Svalbard

Monti, Marina; Minocci, Marco

doi:10.3402/polar.v32i0.19306

Cited by 12 publications

(7 citation statements)

References 24 publications

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“…The phytoplankton were divided into "small" (0.2 to ∼10 µm; assumed to be mainly picophytoplankton, coccolithophores, Phaeocystis sp., and small autotrophic flagellates) and "large" (> 10 µm; mainly diatoms and larger dinoflagellates; Kilias et al, 2014;Nöthig et al, 2015). Zooplankton size classes were the microzooplankton (20-200 µm; ciliates and flagellates), the mesozooplankton (200 to ∼1,000 µm; mainly small copepods) and macrozooplankton (chaetognaths, euphausiids, and Calanus copepods >1,000 µm; Bamstedt et al, 1991;Hop et al, 2006;Blachowiak-Samolyk et al, 2007;Calbet, 2008;Pasternak et al, 2008;De Laender et al, 2010;Svensen et al, 2011;Monti and Minocci, 2013). Small planktivorous fish were assumed to be mainly capelin and herring but this compartment also includes carnivorous zooplankton, such as amphipods (Wassmann et al, 2006;Dalpadado et al, 2016).…”

Section: Model Constructionmentioning

confidence: 99%

Models of Plankton Community Changes during a Warm Water Anomaly in Arctic Waters Show Altered Trophic Pathways with Minimal Changes in Carbon Export

et al. 2017

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Carbon flow through pelagic food webs is an expression of the composition, biomass and activity of phytoplankton as primary producers. In the near future, severe environmental changes in the Arctic Ocean are expected to lead to modifications of phytoplankton communities. Here, we used a combination of linear inverse modeling and ecological network analysis to study changes in food webs before, during, and after an anomalous warm water event in the eastern Fram Strait of the West Spitsbergen Current (WSC) that resulted in a shift from diatoms to flagellates during the summer (June-July). The model predicts substantial differences in the pathways of carbon flow in diatom-vs. Phaeocystis/nanoflagellate-dominated phytoplankton communities, but relatively small differences in carbon export. The model suggests a change in the zooplankton community and activity through increasing microzooplankton abundance and the switching of meso-and macrozooplankton feeding from strict herbivory to omnivory, detritivory and coprophagy. When small cells and flagellates dominated, the phytoplankton carbon pathway through the food web was longer and the microbial loop more active. Furthermore, one step was added in the flow from phytoplankton to mesozooplankton, and phytoplankton carbon to higher trophic levels is available via detritus or microzooplankton. Model results highlight how specific changes in phytoplankton community composition, as expected in a climate change scenario, do not necessarily lead to a reduction in carbon export.

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Section: Model Constructionmentioning

confidence: 99%

Models of Plankton Community Changes during a Warm Water Anomaly in Arctic Waters Show Altered Trophic Pathways with Minimal Changes in Carbon Export

et al. 2017

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“…Although the relative abundance of the species differed seasonally, the composition of the community remained unchanged to a large extent. Most of the dinoflagellates and ciliates species listed in this study have been previously reported from the Kongsfjord (Kubiszyn et al, 2014; Seuthe et al, 2011) and the Svalbard (Monti & Minocci, 2013) region.…”

Section: Discussionmentioning

confidence: 51%

“…This study focuses on the distribution of dinoflagellates and ciliates along the fjord in two different seasons. In spite of the importance of dinoflagellates and ciliates in the pelagic food web system, little information is available about their diversity and composition from the fjord (Aberle et al, 2013; Seuthe et al, 2011) and the Svalbard region (Monti & Minocci, 2013). During both seasons, dinoflagellates dominated the Kongsfjorden at all stations and all depths.…”

Section: Discussionmentioning

confidence: 99%

Spatial and seasonal variations of dinoflagellates and ciliates in the Kongsfjorden, Svalbard

Bhaskar

Tripathy

2020

Marine Ecology

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Abundance and assemblages of dinoflagellates and ciliates were studied in water samples collected from three different depths at five locations in the Kongsfjorden, during summer (June 14–21, 2011) and fall (September 15–27, 2012). Generally, athecate dinoflagellates were ubiquitously dominant during both seasons. Surface dinoflagellates abundance ranged from 1.87 × 103 cells/L (KF1) to 11.62 × 103 cells/L (KF4) and column integrated abundance ranged from 20.3 × 106 cells/m2 (KF1) to 126 × 106 cells/m2 (KF2) during summer. Dinoflagellate abundance was relatively lower during fall ranging from 0.02 × 103 cells/L (KF5) to 0.66 × 103 cells/L (KF3) at surface, and correspondingly, a low column integrated abundance ranging from 2.34 × 106 cells/m2 (KF5) to 19.1 × 106 cells/m2 (KF1) was observed. Amphidinium sp., Gyrodinium fusiforme, Gyrodinium estuarile dominated during summer, while Gymnodinium sp. was dominant during fall. Among ciliates, aloricate ciliates were more dominant than loricates. Ciliates at surface ranged from as low as 0.069 × 103 cells/L (KF1) to 3.69 × 103 cells/L (KF4) during summer. Ciliate abundance increased with depth (up to 20 m). Strombidium spp. (55.28%) and Mesodinium rubrum (36.66%) were dominant during summer. Among the loricates and the aloricates, Strombidium spp. (85.72%) and Tintinnid spp. (92.15%) dominated in fall. The presence of dominant aloricates with characteristic cleptochloroplasts reflected high grazing activity in these waters during both seasons. Diversity study indicates that the dinoflagellates and ciliates are well represented during both seasons. Statistical analyses of the dinoflagellates and ciliates with hydrographic data do not show dominant role of any hydrographical parameters on their diversity, and the same is discussed vis‐à‐vis Atlantification of the fjord.

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“…Submersible pumps have been used to collect microzooplankton in the euphotic layers of the eastern tropical Pacific (Beers et al 1980). Bottles were used for collection along the Strait of Magellan (Fonda-Umani et al 2011) and in a transect from northern continental Norway to Svalbard (Monti & Minocci 2013), while vertical net tows were used in the Weddell Sea Heinbokel & Coats (1986) and in the Southwestern Atlantic Ocean, Thompson et al (1999). Numerous stations of this cruise were in neritic ecosystems or ecosystems influenced by it, as stations in Labrador, Beaufort, the Chuchi and Bering Seas (Stations 6,7,8,12,13,14) and Station 26 west of the Strait of Magellan.…”

Section: Discussionmentioning

confidence: 99%

Fauna of tintinnids (Tintinnida, Ciliata) during an Arctic-Antarctic cruise, with the S/V “Croatian Tern”

Kršinić

2018

Zootaxa

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An investigation of large tintinnids was carried out during the Arctic-Antarctic cruise aboard the S/V "Croatian Tern" in the period from 1994 to 1997. Samples were collected at 33 stations by vertical tows with a Nansen net with a 53 µm mesh size in the Mediterranean Sea, North Atlantic, Labrador Sea, Baffin Bay, the Beaufort, Chukchi and Bering Seas, East North Pacific, South Pacific, South East Pacific, Scotia Sea, and South West Atlantic. A total of 47 species of tintinnids were found, with the greatest diversity in the Tropical areas of the Pacific, Arctic and Subarctic. A very high total abundance was registered in the Bering Sea of 247,393 ind.m -3 and in the South-eastern Pacific of 66,211 ind.m -3 . The dominant species in the northern areas was Ptychocylis obtusa and in the southern areas Eutintinnus rugosus.

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Microzooplankton along a transect from northern continental Norway to Svalbard

Cited by 12 publications

References 24 publications

Models of Plankton Community Changes during a Warm Water Anomaly in Arctic Waters Show Altered Trophic Pathways with Minimal Changes in Carbon Export

Models of Plankton Community Changes during a Warm Water Anomaly in Arctic Waters Show Altered Trophic Pathways with Minimal Changes in Carbon Export

Spatial and seasonal variations of dinoflagellates and ciliates in the Kongsfjorden, Svalbard

Fauna of tintinnids (Tintinnida, Ciliata) during an Arctic-Antarctic cruise, with the S/V “Croatian Tern”

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