West Antarctic Peninsula: An ice-dependent coastal marine ecosystem in transition
Ducklow, Hugh W.; Fraser, William R.; Meredith, Michael P. ORCID: https://orcid.org/0000-0002-7342-7756; Stammerjohn, Sharon E.; Doney, Scott C.; Martinson, Douglas G.; Sailley, Sevrine F.; Schofield, Oscar M.; Steinberg, Deborah K.; Venables, Hugh J. ORCID: https://orcid.org/0000-0002-6445-8462; Amsler, Charles D.. 2013 West Antarctic Peninsula: An ice-dependent coastal marine ecosystem in transition. Oceanography, 26 (3). 190-203. 10.5670/oceanog.2013.62
Before downloading, please read NORA policies.
Text
Palmer LTER An ice-dependent coastal ecosystem in transition.pdf - Submitted Version Restricted to NORA staff only Download (278kB) | Request a copy |
|
Text
PAL Oceanography figures.pdf - Submitted Version Restricted to NORA staff only Download (7MB) | Request a copy |
|
Preview |
Text (Copyright held by the Oceanography Society.)
26-3_ducklow.pdf - Published Version Download (2MB) | Preview |
Abstract/Summary
The extent, duration, and seasonality of sea ice and glacial discharge strongly influence Antarctic marine ecosystems. Most organisms' 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°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.
Item Type: | Publication - Article |
---|---|
Digital Object Identifier (DOI): | 10.5670/oceanog.2013.62 |
Programmes: | BAS Programmes > Polar Science for Planet Earth (2009 - ) > Polar Oceans |
ISSN: | 1042-8275 |
Date made live: | 27 Aug 2013 09:53 +0 (UTC) |
URI: | https://nora.nerc.ac.uk/id/eprint/501743 |
Actions (login required)
View Item |
Document Downloads
Downloads for past 30 days
Downloads per month over past year