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Winter and spring controls on the summer food web of the coastal West Antarctic Peninsula
by
Miles, Travis N
, Fraser, William R
, Steinberg, Deborah K
, Iannuzzi, Richard A
, Martinson, Douglas G
, Coleman, Kaycee E
, Stammerjohn, Sharon E
, Saba, Vincent S
, Patterson-Fraser, Donna L
, Schofield, Oscar M
, Doney, Scott C
, Ducklow, Hugh W
, Saba, Grace K
in
Animals
/ Antarctic Regions
/ Bacteria
/ Chlorophyll - analysis
/ Euphausiacea
/ Food Chain
/ Phytoplankton
/ Seasons
/ Spheniscidae
2014
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Winter and spring controls on the summer food web of the coastal West Antarctic Peninsula
by
Miles, Travis N
, Fraser, William R
, Steinberg, Deborah K
, Iannuzzi, Richard A
, Martinson, Douglas G
, Coleman, Kaycee E
, Stammerjohn, Sharon E
, Saba, Vincent S
, Patterson-Fraser, Donna L
, Schofield, Oscar M
, Doney, Scott C
, Ducklow, Hugh W
, Saba, Grace K
in
Animals
/ Antarctic Regions
/ Bacteria
/ Chlorophyll - analysis
/ Euphausiacea
/ Food Chain
/ Phytoplankton
/ Seasons
/ Spheniscidae
2014
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While trying to remove the title from your shelf something went wrong :( Kindly try again later!
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Winter and spring controls on the summer food web of the coastal West Antarctic Peninsula
by
Miles, Travis N
, Fraser, William R
, Steinberg, Deborah K
, Iannuzzi, Richard A
, Martinson, Douglas G
, Coleman, Kaycee E
, Stammerjohn, Sharon E
, Saba, Vincent S
, Patterson-Fraser, Donna L
, Schofield, Oscar M
, Doney, Scott C
, Ducklow, Hugh W
, Saba, Grace K
in
Animals
/ Antarctic Regions
/ Bacteria
/ Chlorophyll - analysis
/ Euphausiacea
/ Food Chain
/ Phytoplankton
/ Seasons
/ Spheniscidae
2014
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Winter and spring controls on the summer food web of the coastal West Antarctic Peninsula
Journal Article
Winter and spring controls on the summer food web of the coastal West Antarctic Peninsula
2014
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Overview
Understanding the mechanisms by which climate variability affects multiple trophic levels in food webs is essential for determining ecosystem responses to climate change. Here we use over two decades of data collected by the Palmer Long Term Ecological Research program (PAL-LTER) to determine how large-scale climate and local physical forcing affect phytoplankton, zooplankton and an apex predator along the West Antarctic Peninsula (WAP). We show that positive anomalies in chlorophyll-a (chl-a) at Palmer Station, occurring every 4-6 years, are constrained by physical processes in the preceding winter/spring and a negative phase of the Southern Annular Mode (SAM). Favorable conditions for phytoplankton included increased winter ice extent and duration, reduced spring/summer winds, and increased water column stability via enhanced salinity-driven density gradients. Years of positive chl-a anomalies are associated with the initiation of a robust krill cohort the following summer, which is evident in Adélie penguin diets, thus demonstrating tight trophic coupling. Projected climate change in this region may have a significant, negative impact on phytoplankton biomass, krill recruitment and upper trophic level predators in this coastal Antarctic ecosystem.
Publisher
Nature Publishing Group
Subject
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