Variability of epipelagic macrozooplankton/micronekton community structure in the NW Weddell Sea, Antarctica (1995–1996)

Fisher, Erin; Kaufmann, Ronald S.; Smith, Kenneth L.

doi:10.1007/s00227-003-1177-6

Cited by 18 publications

(18 citation statements)

References 51 publications

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“…Such changes in the upper metres of the water column could not be detected by Cisewski et al (2010), because they did not sample above 20 m water depth. Similar limitations apply to other studies using acoustic sensors (Brierley et al, , 1998Zhou et al, 1994), as well as net-based investigations integrating the upper 50-300 m in a single density figure (Boysen-Ennen and Piatkowski, 1988;Fisher et al, 2004;Lancraft et al, 2004;Siegel, 2012). Within the range of uncertainty that is associated with the limitations of the acoustic method in resolving the near-surface layer and in discriminating species, the results of this study are however consistent with the DVM annual time series of Cisewski et al (2010).…”

Section: Significance Of the Surface Layer Habitatsupporting

confidence: 84%

“…The diversity of this realm was therefore likely substantially underestimated. In the frequently sampled epipelagic layer, the 43-56 species per season identified in our study were at the high end of the range previously reported for macrozooplankton/micronekton in Antarctic off-shelf waters between 0 and 300 m depth in the wider Weddell Sea (Boysen-Ennen and Piatkowski, 1988;Fisher et al, 2004;Siegel et al, 1992), as well as in other parts of the Southern Ocean (Hunt et al, 2007;Lancraft et al, 2004;Siegel and Harm, 1996).…”

Section: Species Compositionsupporting

confidence: 71%

“…Ashjian et al, 2004;Lancraft et al, 1989;Siegel and Piatkowski, 1990). Only Hosie (1994), Siegel and Harm (1996), and Fisher et al (2004) analysed the macrofauna composition in deep sea areas of the Prydz Bay region (east Antarctica), the southern Bellingshausen Sea, and the north-western Weddell Sea, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…In most recent studies, however, the surface layer is integrated in a deeper epipelagic depth stratum, typically ranging from the surface to 50-300 m depth (e.g. Donnelly et al, 2006;Fisher et al, 2004;Hunt et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

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Seasonal changes in the vertical distribution and community structure of Antarctic macrozooplankton and micronekton

Flores

Hunt

Kruse

et al. 2014

Deep Sea Research Part I: Oceanographic Research Papers

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This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues.Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. b s t r a c tThe macrozooplankton and micronekton community of the Lazarev Sea (Southern Ocean) was investigated at 3 depth layers during austral summer, autumn and winter: (1) the surface layer (0-2 m); (2) the epipelagic layer (0-200 m); and (3) the deep layer (0-3000 m). Altogether, 132 species were identified. Species composition changed with depth from a euphausiid-dominated community in the surface layer, via a siphonophore-dominated community in the epipelagic layer, to a chaetognathdominated community in the deep layer. The surface layer community predominantly changed along gradients of surface water temperature and sea ice parameters, whereas the epipelagic community mainly changed along hydrographical gradients. Although representing only 1% of the depth range of the epipelagic layer, mean per-area macrofauna densities in the surface layer ranged at 8% of corresponding epipelagic densities in summer, 6% in autumn, and 24% in winter. Seasonal shifts of these proportional densities in abundant species indicated different strategies in the use of the surface layer, including both hibernal downward and hibernal upward shift in the vertical distribution, as well as year-round surface layer use by Antarctic krill. These findings imply that the surface layer, especially when it is ice-covered, is an important functional node of the pelagic ecosystem that has been underestimated by conventional depth-integrated sampling in the past. The exposure of this key habitat to climate-driven forces most likely adds to the known susceptibility of Antarctic pelagic ecosystems to temperature rise and changing sea ice conditions.

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Section: Significance Of the Surface Layer Habitatsupporting

confidence: 84%

Section: Species Compositionsupporting

confidence: 71%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seasonal changes in the vertical distribution and community structure of Antarctic macrozooplankton and micronekton

Flores

Hunt

Kruse

et al. 2014

Deep Sea Research Part I: Oceanographic Research Papers

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“…Larvae of Bathylagidae, Myctophidae and Paralepididae are common in oceanic nearsurface waters (Hoddell et al 2000, Fisher et al 2004). In high Antarctic shelf waters, the nototheniid Pleuragramma antarcticum (Antarctic silverfish) is the dominating pelagic species (White & Piatkowski 1993, Hoddell et al 2000.…”

Section: Introductionmentioning

confidence: 99%

Distribution, abundance and ecological relevance of pelagic fishes in the Lazarev Sea, Southern Ocean

Flores¹,

Putte²,

Siegel³

et al. 2008

Mar. Ecol. Prog. Ser.

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, respectively. A generalized additive model significantly related the density of postlarval E. antarctica to the abundance of Antarctic krill Euphausia superba, ocean depth and sea surface temperature. The diet of E. antarctica was dominated by copepods and euphausiid larvae. Mean energy density of E. antarctica in the upper 200 m was 2.8 kJ m -2 , which is equivalent to 36% of the energy stored in Antarctic krill stocks and probably would be considerably higher if a greater depth range were considered. This suggests that E. antarctica is a major energy transmitter in the food web of the Lazarev Sea, challenging the classical krill-dominated food web paradigm of the Southern Ocean.

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Distribution and abundance of micronekton and macrozooplankton in the NW Weddell Sea: relation to a spring ice-edge bloom

2005

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Variability of epipelagic macrozooplankton/micronekton community structure in the NW Weddell Sea, Antarctica (1995–1996)

Cited by 18 publications

References 51 publications

Seasonal changes in the vertical distribution and community structure of Antarctic macrozooplankton and micronekton

Seasonal changes in the vertical distribution and community structure of Antarctic macrozooplankton and micronekton

Distribution, abundance and ecological relevance of pelagic fishes in the Lazarev Sea, Southern Ocean

Distribution and abundance of micronekton and macrozooplankton in the NW Weddell Sea: relation to a spring ice-edge bloom

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