> Powerboat-World.com
 
 
News Home Video Gallery Newsletters FishingBoating Features Photo Gallery Sail-World Australia Australian Cruising
MarineBusiness-World

 

Sail-World.com : Warming Climate impacts Food Web base in Western Antarctic Peninsula

Warming Climate impacts Food Web base in Western Antarctic Peninsula

'Populations of adelie penguins, whose lifestyle requires an Antarctic climate, have dropped sharply in recent years in parts of the peninsula. (Chris Linder, Woods Hole Oceanographic Institution)'    Woods Hole Oceanographic Institution (WHOI) ©

A paper published this March in Science shows for the first time that the warming climate is changing the numbers and composition of phytoplankton—the base of the food web—along the western shelf of the Antarctic Peninsula.

Summertime levels of phytoplankton have decreased by 12 percent over the past 30 years off the Western Antarctic Peninsula, reports the team, which was led by Martin Montes-Hugo of the Institute of Marine and Coastal Sciences at Rutgers University.

The climate of the western shelf of the Antarctic Peninsula is undergoing rapid physical climate change. Over the past half-century, winter air temperatures warmed at almost five times the global average rate—the most rapid warming of the past 500 years. In addition, seasonal sea ice in this region now arrives later in autumn and leaves earlier in spring, a trend that has displaced populations of sea ice-dependent animals.

'With the striking climate change we’ve observed in Antarctica, scientists have known that higher organisms like penguins are being affected,' said Scott Doney, a marine geochemist at the Woods Hole Oceanographic Institution (WHOI) who assisted Montes-Hugo with the numerical analysis of the satellite and field data. 'But this is the first evidence we’ve seen that those changes are having an impact on the base of the food web.'

For this study, Montes-Hugo analyzed 30 years of satellite and field data on ocean color, temperature, sea ice, cloud cover, and wind speed to determine the changes in phytoplankton along the WAP.

'This important scientific discovery is a result of the synergy between satellite data and time series data,' Doney added. 'Being able to tie these data together was a critical new step.'

This paper stems from work done as part of the National Science Foundation Office of Polar Program’s Long-Term Ecological Research (LTER) project at Palmer Station, Antarctica. Besides Montes-Hugo and Doney, the paper’s co-authors are Hugh Ducklow, co-director of the Ecosystems Center at the Marine Biological Laboratory (MBL), Oscar Schofield, Rutgers University’s Institute of Marine and Coastal Sciences; William Fraser, Polar Oceans Research Group, Sheridan, Montana; Douglas Martinson, Columbia University’s Lamont-Doherty Earth Observatory; and Sharon E. Stammerjohn, University of California at Santa Cruz.

EXTRACT: Phytoplankton Changing Along the Antarctic Peninsula as Climate Warms, Rutgers Scientists Find.

As the cold, dry climate of the western Antarctic Peninsula becomes warmer and more humid, phytoplankton – the bottom of the Antarctic food chain – is decreasing off the northern part the peninsula and increasing further south, Rutgers marine scientists have discovered. In research to be published (tomorrow) in the journal Science, Martin Montes-Hugo and Oscar Schofield report that levels of phytoplankton off the western Antarctic Peninsula have decreased 12 percent over the past 30 years.

Their paper, Recent Changes in Phytoplankton Communities Associated with Rapid Regional Climate Change Along the Western Antarctic Peninsula, draws on 30 years of satellite data and field studies. Montes-Hugo is a postdoctoral researcher and Schofield is a professor of marine science at the Institute of Marine and Coastal Sciences in the School of Environmental and Biological Sciences at Rutgers University.

The Antarctic Peninsula is the northernmost part of Antarctica, stretching north to within 640 miles of Tierra del Fuego in South America.

'What is new is that we're showing for the first time that there is an ongoing change in phytoplankton concentration and composition along the western shelf of the Antarctic Peninsula that is associated with a long-term climate modification,' Montes-Hugo said. 'These phytoplankton changes may explain in part the observed decline of some penguin populations'

Researchers have noticed that populations of adelie penguins, whose lifestyle requires an Antarctic climate, have dropped sharply in recent years in the northern part of the peninsula, while populations of sub-Antarctic penguins, such as chin-strap penguins, have increased.

'Now we know that climate changes are impacting at the base of the food web and forcing their effects on up through the food chain,' said Hugh Ducklow, co-author of the paper and co-director of the Ecosystems Center at the Marine Biological Laboratory in Woods Hole, Massachusetts. 'Martin Montes-Hugo’s elegant work, utilizing different satellite streams of data, nailed that down.'

Scientists have long noted that the Antarctic Peninsula is warming faster than any part of the Earth during winter.

Read the full release at Rutgers University New Jersey. click here


The R/V Laurence M. Gould, docked after a 2002 winter cruise, dwarfs the buildings of the U.S. research outpost at Palmer Station, Antarctica. (Peter Wiebe, Woods Hole Oceanographic Institution) -  Woods Hole Oceanographic?nid=55825 Institution (WHOI) ©

The Woods Hole Oceanographic Institution is a private, independent organization in Falmouth, Mass., dedicated to marine research, engineering, and higher education. Established in 1930 on a recommendation from the National Academy of Sciences, its primary mission is to understand the oceans and their interaction with the Earth as a whole, and to communicate a basic understanding of the oceans’ role in the changing global environment.

http://www.whoi.edu/




by WHOI /Rutgers University

  

Click on the FB Like link to post this story to your FB wall

http://www.powerboat-world.com/index.cfm?nid=55825

11:25 PM Tue 14 Apr 2009 GMT






Click here for printer friendly version
Click here to send us feedback or comments about this story.

Click for further information on
Environment and the ocean

Related News Stories:

27 Nov 2013  World Oceans Day appeals for funds
16 Nov 2013  Gigantic iceberg sails north from the Antarctic
09 Nov 2013  Sailing and swimming with manatees - Oceans Watch Essay
01 Nov 2013  OceansWatch: cruising sailors give something back in the South Pacific
23 Oct 2013  'The Ocean is Broken' - without fish, there can be no birds
13 Oct 2013  PlanetSolar reaches Paris after successful ocean study
02 Oct 2013  Monaco Yacht Show goes Green
07 Sep 2013  Great Pacific Garbage Patch - the real story
03 Sep 2013  World's largest solar yacht drops anchor after marine science quest
25 Aug 2013  Boat owners: cover vessels to deter seagulls
MORE STORIES ...

Power Boat News









Yamaha inspires students to succeed by Yamaha Motor Australia,








Swan celebrates sales success *Feature by Jeni Bone,




Polar research: Six priorities for Antarctic science by Mahlon C. Kennicutt II and colleagues,


Stealth i14 out of China by Neil Patchett,












































NSW Environment Minister awards 'Fish Friendly' Marina Accreditations
Refurbished Protector project 'better than buying new'
Gold Coast International Marine Expo - High-Diver Steve Black is back
4x4 Outdoors Show, Fishing and Boating Expo - Campfire cooking corner
See the heat with FLIR ONE *Feature
John Temple to retire, Will Sangster appointed General Manager
Multihull Central launches Aquila range at SIBS *Feature
If all else fails read the instructions!!
If all else fails read the instructions!!
Sun shines on recreational boating at Sydney International Boat Show
Phuket Yacht Show: new kid on the block taking on PIMEX? *Feature
2014 Offshore Superboat Championships - The boats are back!
Sydney International Boat Show - Days 3 & 4 *Feature
Kirby Marine launch 13metre Naiad Tender
Shellfish reefs in Port Phillip Bay to be rejuvenated
2014 Brisbane Boat Show - What's your trailer boat worth?
Custom exhaust system solves buoyancy problem
Sydney International Boat Show - Day 2 *Feature
Marine Rescue volunteers celebrate new unit and $120,000 vessel
Sydney International Boat Show - images from Day 1 *Feature
Pantaenius Insurance - being seen in yellow, green and orange *Feature   
Sydney International Boat Show begins!   
Sydney International Boat Show - Changed conditions on Sydney Harbour   
Fraser Island annual fishing closure starts August 1   
Mildura boaters reminded Murray River will be low until mid August   
Gold Coast Broadwater no closer to welcoming supermaxis *Feature   
Sydney International Boat Show - all systems go!   
UK superyacht industry on the rise   
EOMAP modelling shows what's under our water   
Great Barrier Reef in a bad state, and getting worse   
Gold Coast International Marine Expo - Organisers add extra sites   
Series Point’s Championship - Formula Two team secures a second place   
Marine Rescue volunteers called to rescue second vessel out of fuel   
Predictwind helps you pick the best time to depart   
Marine Rescue volunteers rescue seven in marathon operation   
Watch this whale lift a Kayak clear out of the water   
Clipper Motor Yachts expands with Boat Equity   
Check out the Fountaine Pajot Saba 50 at Autumn boat shows   
Brisbane's biggest outdoors expo to celebrate ten years   
Vietnam Marina Development: ONE°15 Vung Ro Bay Marina Resort   


For this week's complete news stories select    Last 7 Days
   Search All News
For last month's complete news stories select    Last 30 Days
   Archive News







Sail-World.com  


















Switch Default Region to:

Social Media

Asia

Australia

Canada

Europe

New Zealand

United Kingdom


http://www.sail-world.com/event_images/image/Twitter_logo_small.png   http://www.sail-world.com/event_images/image/RSS-Icon.png

United States

Cruising Northern

Cruising Southern

MarineBusiness World

PowerBoat World

FishingBoating World

 

Contact

Commercial

News

Search

Contact Us

Advertisers Information

Submit news/events

Search Stories/Text

Feedback

Advertisers Directory

Newsletter Archive

Photo Gallery

 

Banner Advertising Details

Newsletter Subscribe

Video Gallery

Policies

 

 

 

Privacy Policy

 

 


Cookie Policy

 

 



This site and its contents are © Copyright TetraMedia and/or the original author, photographer etc. All Rights Reserved.  Photographs are copyright by law.  If you wish to use or buy a photograph contact the photographer directly.
XLXL WAS PBW
LocalAds   DE  ES  FR  IT