Penguin Biogeography Along the West Antarctic Peninsula: Testing the Canyon Hypothesis with Palmer LTER Observationsf

Schofield, Oscar; Ducklow, Hugh W.; Bernard, Kim S.; Doney, Scott C.; Patterson‐Fraser, Donna L.; Gorman, Kristen B.; Martinson, Douglas G.; Meredith, Michael P.; Saba, Grace; Stammerjohn, Sharon; Steinberg, Deborah K.; Fraser, William R.

doi:10.5670/oceanog.2013.63

Cited by 45 publications

(59 citation statements)

References 1 publication

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“…It is bisected by the landward ends of several glacial-erosion submarine troughs and canyons that exceed 750 m in depth and extend across the continental shelf (Anderson, 1999 (Fraser and Trivelpiece, 1996;Schofield et al, 2013, in this issue).…”

Section: Oceanogr Aphy and Climatementioning

confidence: 93%

West Antarctic Peninsula: An Ice-Dependent Coastal Marine Ecosystem in Transition

Ducklow¹,

Fraser²,

Meredith³

et al. 2013

oceanog

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266

252

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Section: Oceanogr Aphy and Climatementioning

confidence: 93%

West Antarctic Peninsula: An Ice-Dependent Coastal Marine Ecosystem in Transition

Ducklow¹,

Fraser²,

Meredith³

et al. 2013

oceanog

Self Cite

266

252

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“…In the Amundsen and Bellingshausen Seas and along the West Antarctic Peninsula, CDW delivery within canyons is both observed (Martinson and McKee, 2012;Assmann et al, 2013;Schofield et al, 2013;Wåhlin et al, 2013;Walker et al, 2013) and modeled (Thoma et al, 2008;Dinniman et al, 2011). Many studies implicate the westerlies in driving the exchange.…”

Section: How Do Acc Waters Influence Subglacial Cavities?mentioning

confidence: 99%

Temporal Changes in the Antarctic Circumpolar Current: Implications for the Antarctic Continental Shelves

Gille¹,

McKee²,

Martinson³

2016

Oceanog.

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“…Krill are often modeled as passive drifters, and their presence in fjords and canyons may be driven by advection (Schofield et al 2013, Bernard & Steinberg 2013. Canyons can interrupt the along-shelf flow, serving as conduits for cross-shelf exchange (Allen & Durrieu de Madron 2009).…”

Section: Advection Into Fjordsmentioning

confidence: 99%

Winter distribution and size structure of Antarctic krill Euphausia superba populations in-shore along the West Antarctic Peninsula

Cleary¹,

Durbin²,

Casas³

et al. 2016

Mar. Ecol. Prog. Ser.

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Antarctic krill Euphausia superba are a key component of food webs in the maritime West Antarctic Peninsula, and their life history is tied to the seasonal cycles of sea ice and primary production in the region. Previous work has shown a general in-shore migration of krill in winter in this region; however, the very near-shore has not often been sampled as part of these surveys. We investigated distribution, abundance, and size structure of krill in 3 fjordic bays along the peninsula, and in the adjacent Gerlache Strait area using vertically stratified MOCNESS net tows and ADCP acoustic biomass estimates. Krill abundance was high within bays, with net estimated densities exceeding 60 krill m −3 , while acoustic estimates were an order of magnitude higher. Krill within bays were larger than krill in the Gerlache Strait. Within bays, krill aggregations were observed near the seafloor during the day with aggregations extending to the sediment interface, and exhibited diel vertical migration higher into the water column at night. We suggest these high winter krill abundances within fjords are indicative of an active seasonal migration by krill in the peninsula region. Potential drivers for such a migration include reduced advective losses and costs, and availability of sediment food resources within fjords. Seasonally near-shore krill may also affect stock and recruitment assessments and may have implications for managing the krill fishery in this area.

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Penguin Biogeography Along the West Antarctic Peninsula: Testing the Canyon Hypothesis with Palmer LTER Observationsf

Cited by 45 publications

References 1 publication

West Antarctic Peninsula: An Ice-Dependent Coastal Marine Ecosystem in Transition

West Antarctic Peninsula: An Ice-Dependent Coastal Marine Ecosystem in Transition

Temporal Changes in the Antarctic Circumpolar Current: Implications for the Antarctic Continental Shelves

Winter distribution and size structure of Antarctic krill Euphausia superba populations in-shore along the West Antarctic Peninsula

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