sail-world.com
 
 
News Home Cruising Australia Cruising USA Cruising Canada Boats for Sale Sail-World Racing Photo Gallery FishingBoating
Photo Gallery FishingBoating Video Gallery Newsletters
Sail-World.com : New study shows age matters to Antarctic clams
New study shows age matters to Antarctic clams


'Antarctic Clams'    British Antarctic Survey ©

A new study of Antarctic clams reveals that age matters when it comes to adapting to the effects of climate change. The research provides new insight and understanding of the likely impact of predicted environmental change on future ocean biodiversity.

Reporting this week in the journal Global Change Biology scientists from British Antarctic Survey (BAS) and from Germany’s University of Kiel and the Alfred Wegener Institute reveal that when it comes to environmental change the reaction of Antarctic clams (laternula elliptica) – a long-lived and abundant species that lives in cold, oxygen-rich Antarctic waters – is different depending on how old the animal is.

The study showed that whilst young clams (average of three years old) try to move to a better area in the sea-bed sediments when they sense warmer temperature or reduced oxygen levels, the older (18 years old) more sedentary clams stay put. This has implications for future clam populations because it is the older animals that reproduce. Scientists anticipate that future oceans will be slightly warmer and contains less oxygen (a condition known as hypoxia).

Lead Author Dr Melody Clark of British Antarctic Survey said:

'Antarctic clams play a vital role in the ocean ecosystem. They draw down carbon into sea-bed sediments and circulate ocean nutrients. We know that they are extremely sensitive to their environment. Our study suggests that the numbers of clams that will survive a changing climate will reduce.

'The Polar Regions are the Earth’s early warning system and Antarctica is a great natural laboratory to study to future global change. These small and rather uncharismatic animals can tell us a lot about age and survival in a changing world – they are one of the ‘engines of the ocean’.'

Co-author, Eva Phillip, from the University of Kiel, says:

'The study shows that it is important to investigate different ages of a population to understand population wide changes and responses. In respect to Antarctic clams it has been indicated in previous studies that older individuals may suffer more severely in a changing environment and the new study corroborates this assumption. Only the investigation of population-wide effects makes it possible to draw conclusions for coastal ecosystems.'

Like humans, clams’ muscle mass decreases as they get older. This means they get more sedentary. So when changes are introduced into their habitat, the older clams tend to just sit it out until conditions revert back to normal.

Doris Abele of the Alfred Wegener Institute in Germany says:

'Our study shows that the physiological flexibility of young clams diminishes as they get older. However, the species has evolved in such a way that the fittest animals, that can tolerate life in an extreme environment, survive to reproduce into old age. Climatic change, affecting primarily the older clams, may interfere with this evolutionary strategy, with unpredictable consequences for ecosystems all around Antarctica.'

The research was funded by the Natural Environment Research Council, the German Research Foundation and the European Science Foundation.

British Antarctic Survey


by Paul B. Holland

  

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

http://www.sail-world.com/index.cfm?nid=108579

3:21 AM Fri 19 Apr 2013GMT


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







Sail-World Cruising News - local and the World













Death by Dinghy by Allan Riches Brunei Bay Radio,












A case of crossed wires? A shocking situation! by Stuart Carruthers, RYA Cruising Manager,










Canal Boating in the Alsace with the Galley Guys by Greg Nicoll with John Armstrong,


World ARC fleet arrives in Darwin by World Cruising Club,


Dangers of the Dinghy trip back to your boat by Rob Kothe & the Sail-World Team,


European Odyssey visits Porto by Cornell Sailing,






Where in the world are our strongest corals? by Hanny Rivera - Cohen's Lab,














Barnacle Busting by Neil and Ley Langford,


From Penguins to Polar Bears by Cherie Winner,




A cruising guide to the ABC Islands - Spanish Edition
Missing German tourists in the hands of Abu Sayyaf Group
NCI granted dedicated VHF Channel
Positive news for cruising boats in Greece
Bivalves' ability to clean chemicals from waterways
Are You Sailing with 'Weak Links' in your sailing rigging?
Week-long cruise turns into 16-year round-the-world voyage
World ARC fleet cruising the Coral Coast
Four rescued after narrow boat collides with houseboat
Yacht penalized for calling unannounced into Port Resolution
Galley Guys on the Malty Seas
Blue Planet Odyssey - Beset in Arctic Bay ice + Video
European Odyssey - La Coruña a big hit for the boats participating
Garcia Yachts Exploration 45 - Jimmy Cornell's newest adventure
Sustainable Seafood - How to purchase with confidence
Risks to penguin populations continues
ARC Baltic fleet head from Helsinki to Stockholm
Follow these tips when anchoring
Swedish couple rescued off Cook Islands
Refurbished Protector project 'better than buying new'
Galley Guys meet the Spice Lady   
North American Rally to the Caribbean - Get prepared to head south   
If all else fails read the instructions!!   
ARC Baltic fleet cruising and anchoring in the Finnish archipelago   
Phuket Yacht Show: new kid on the block taking on PIMEX? *Feature   
Sea and Summit leg seven - Rain fails to dampen Tash's spirits   
RYA meets with Government over latest red diesel development   
Endangered species are like Movie Stars - Charlie Sheens and Tom Hanks   
Halong becomes a Super Typhoon; Japan in harm's way   
Vanuatu Customs making life easier for visiting cruising yachts   
Baltic 4 Nations rally is now in full swing   
Tropical Storm Bertha expected to become a typhoon   
Flags at Sea, an infographic by John Tissott   
Cruising lessons from ocean racers   
Procedures set out for waterborne visitors to Vanuatu   
17-year-old RNLI volunteer saves child in first rescue mission + Video   
Teen names latest RNLI Shannon class lifeboat in Poole + Video   
RYA Sea Survival Handbook – 2nd edition now available   
Fascinating opportunity with OceansWatch   
Lobster Thermidor - Making Julia proud   


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/FaceBook-icon.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 NEW CRU NH
LocalAds   DE  ES  FR  IT