Deep-sea near-bottom swarms of pelagic amphipods<i>Themisto:</i>observations from submersibles

Vinogradov, G. M.

doi:10.1080/00364827.1999.10807352

Cited by 30 publications

(16 citation statements)

References 3 publications

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“…In addition, regular seasonal appearances of dense swarms of T. abyssorum and T. libellula could also have contributed to the abundance patterns in the swimmer samples, as both species have been previously observed to exhibit such behavior (Vinogradov 1999). We hypothesize, however, that the reccurring patterns in the long-term deployed sediment traps would require a repeated, periodic appearance of such swarming events.…”

Section: Pros and Cons -Sediment Traps And Zooplankton Abundancesmentioning

confidence: 87%

Amphipod abundance in sediment trap samples at the long-term observatory HAUSGARTEN (Fram Strait, ∼79°N/4°E). Variability in species community patterns

2010

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Since 2000, sediment traps have been deployed at the HAUSGARTEN (a long-term observatory established by the Alfred-Wegener-Institute for Polar and Marine Research in 1999) in the Fram Strait, (west of Spitsbergen at a water depth of 2,500 m, located in the confluence zone of the warm saline Atlantic water and water masses of polar origin) in order to investigate seasonal and inter-annual fluctuation of particle flux and the various contribution of zooplankton swimmers. Amongst these swimmers, amphipods are regularly observed occurring in a recurrent pattern and they dominate the biomass. Thus, we present data on amphipods regarding their seasonal and regional distribution pattern throughout the period 2000-2007. The most frequently observed amphipod species are Themisto libellula, T. abyssorum and T. compressa. While Themisto libellula is considered a true Arctic species associated to polar water masses, the boreal-Atlantic species Themisto abyssorum is imported into the Arctic by Atlantic water. A third species, Themisto compressa, occurred in 2004 and has been continually observed in the samples since then. The latter species has its main distribution in the warm regions of the North Atlantic and its occurrence in the Fram Strait points to the increased influence of warm Atlantic water masses. During 2000-2007, the amphipod composition in the samples has changed in favor of T. abyssorum and T. compressa. These shifts could suggest a northward movement of Atlantic species in the seasonally ice-covered area, a region of the ocean anticipated to react very sensitively to global warming.

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Section: Pros and Cons -Sediment Traps And Zooplankton Abundancesmentioning

confidence: 87%

Amphipod abundance in sediment trap samples at the long-term observatory HAUSGARTEN (Fram Strait, ∼79°N/4°E). Variability in species community patterns

2010

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“…Acoustic flares rising from the seafloor in the area are frequently observed hydroacoustically (Hustoft, Bünz et al 2009;Bünz et al 2012). Tubeworms and patches with white bacterial mats (probably Beggiatoa), indicating areas of active gas seeping, have been observed in the pockmarks (Vinogradov 1999;Åström et al 2018).…”

Section: Study Areamentioning

confidence: 96%

Cold-seep fossil macrofaunal assemblages from Vestnesa Ridge, eastern Fram Strait, during the past 45 000 years

et al. 2019

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“…However, P. macropa and C. lucasii are not known to swarm (Vinogradov, 1999b) but can still be found in sufficient biomass to represent a major food source for top predators (Zeidler & De Broyer, 2014).…”

Section: Do Themisto Species Swarm?mentioning

confidence: 99%

Predatory zooplankton on the move: Themisto amphipods in high-latitude marine pelagic food webs

Havermans

Auel

Hagen

et al. 2019

Advances in Marine Biology

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Hyperiid amphipods are predatory pelagic crustaceans that are particularly prevalent in high-latitude oceans. Many species are likely to have co-evolved with soft-bodied zooplankton groups such as salps and medusae, using them as substrate, for food, shelter or reproduction. Compared to other pelagic groups, such as fish, euphausiids and soft-bodied zooplankton, hyperiid amphipods are poorly studied especially in terms of their distribution and ecology. Hyperiids of the genus Themisto, comprising seven distinct species, are key players in temperate and cold-water pelagic ecosystems where they reach enormous levels of biomass. In these areas, they are important components of marine food webs, and they are major prey for many commercially important fish and squid stocks. In northern parts of the Southern Ocean, Themisto are so prevalent that they are considered to take on the role that Antarctic

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Deep-sea near-bottom swarms of pelagic amphipodsThemisto:observations from submersibles

Cited by 30 publications

References 3 publications

Amphipod abundance in sediment trap samples at the long-term observatory HAUSGARTEN (Fram Strait, ∼79°N/4°E). Variability in species community patterns

Amphipod abundance in sediment trap samples at the long-term observatory HAUSGARTEN (Fram Strait, ∼79°N/4°E). Variability in species community patterns

Cold-seep fossil macrofaunal assemblages from Vestnesa Ridge, eastern Fram Strait, during the past 45 000 years

Predatory zooplankton on the move: Themisto amphipods in high-latitude marine pelagic food webs

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