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


Authors: Ducklow, Hugh W.; Fraser, William R.; Meredith, Michael P.; Stammerjohn, Sharon E.; Doney, Scott C.; Martinson, Douglas G.; Sailley, Sevrine F.; Schofield, Oscar M.; Steinberg, Deborah K.; Venables, Hugh J.; Amsler, Charles D.
Article Title: West Antarctic Peninsula: An Ice-Dependent Coastal Marine Ecosystem in Transition
Abstract: The extent, duration, and seasonality of sea ice and glacial discharge strongly influence Antarctic marine ecosystems. Most organisms#39; life cycles in this region are attuned to ice seasonality The annual retreat and melting of sea ice in the austral spring stratifies the upper ocean, triggering large phytoplankton blooms. The magnitude of the blooms is proportional to the winter extent of ice cover, which can act as a barrier to wind mixing. Antarctic krill, one of the most abundant metazoan populations on Earth, consume phytoplankton blooms dominated by large diatoms. Krill, in turn, support a large biomass of predators, including penguins, seals, and whales. Human activity has altered even these remote ecosystems. The western Antarctic Peninsula region has warmed by 7 degrees C over the past 50 years, and sea ice duration has declined by almost 100 days since 1978, causing a decrease in phytoplankton productivity in the northern peninsula region. Besides climate change, Antarctic marine systems have been greatly altered by harvesting of the great whales and now krill. It is unclear to what extent the ecosystems we observe today differ from the pristine state.
Keywords: SEA-ICE; FOOD-WEB; CLIMATE-CHANGE; carbon flux; REGION; BIOMASS; SOUTHERN-OCEAN; MARGUERITE BAY; ZONE WEST; SPATIOTEMPORAL VARIABILITY
Journal Title: Oceanography
Volume: 26
Issue: 3
ISSN: 1042-8275
Publisher: Oceanography Society  
Publication Place: ROCKVILLE; P.O. BOX 1931, ROCKVILLE, MD USA
Date Published: 2013
Start Page: 190
End Page: 203
DOI/URL:
Notes: PT: J; TC: 3; SI: SI; UT: WOS:000323808600026
Woods Hole Authors
  1. Hugh W Ducklow
    159 Ducklow
  2. Scott C. Doney
    183 Doney
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