Featured Research

from universities, journals, and other organizations

Age matters to Antarctic clams: Age matters when it comes to adapting to the effects of climate change

Date:
April 18, 2013
Source:
British Antarctic Survey
Summary:
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.

Clam. A new study of Antarctic clams reveals that age matters when it comes to adapting to the effects of climate change.
Credit: Image courtesy of 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.

Related Articles


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."


Story Source:

The above story is based on materials provided by British Antarctic Survey. Note: Materials may be edited for content and length.


Journal Reference:

  1. Melody S. Clark, Gunnar Husmann, Michael A. S. Thorne, Gavin Burns, Manuela Truebano, Lloyd S. Peck, Doris Abele, Eva E. R. Philipp. Hypoxia impacts large adults first: consequences in a warming world. Global Change Biology, 2013; DOI: 10.1111/gcb.12197

Cite This Page:

British Antarctic Survey. "Age matters to Antarctic clams: Age matters when it comes to adapting to the effects of climate change." ScienceDaily. ScienceDaily, 18 April 2013. <www.sciencedaily.com/releases/2013/04/130418104326.htm>.
British Antarctic Survey. (2013, April 18). Age matters to Antarctic clams: Age matters when it comes to adapting to the effects of climate change. ScienceDaily. Retrieved April 18, 2015 from www.sciencedaily.com/releases/2013/04/130418104326.htm
British Antarctic Survey. "Age matters to Antarctic clams: Age matters when it comes to adapting to the effects of climate change." ScienceDaily. www.sciencedaily.com/releases/2013/04/130418104326.htm (accessed April 18, 2015).

Share This


More From ScienceDaily



More Earth & Climate News

Saturday, April 18, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Planet Defence Conference Tackles Asteroid Threat

Planet Defence Conference Tackles Asteroid Threat

AFP (Apr. 17, 2015) — Scientists gathered at a European Space Agency (ESA) facility outside Rome this week for the Planetary Defence Conference 2015 to discuss how to tackle the potential threat from asteroids hitting Earth. Duration: 00:54 Video provided by AFP
Powered by NewsLook.com
Gulf Scarred, Resilient 5 Years After BP Spill

Gulf Scarred, Resilient 5 Years After BP Spill

AP (Apr. 17, 2015) — Five years after the Deepwater Horizon spill in the Gulf of Mexico, splotches of oil still dot the seafloor and wads of tarry petroleum-smelling material hide in pockets in the marshes of Barataria Bay. (April 17) Video provided by AP
Powered by NewsLook.com
Boeing's Autonomous Underwater Vehicles (AUV) Echo Ranger

Boeing's Autonomous Underwater Vehicles (AUV) Echo Ranger

Scuba Diving (Apr. 16, 2015) — Seventy years after its service in World War II, NOAA, working with private industry partners, has confirmed the location and condition of the USS Independence. Resting upright in 2,600 feet of water off California’s Farallon Islands, the aircraft carrier’s hull and flight deck are clearly visible in sonar images, with what appears to be a plane in the carrier’s hangar bay. Video provided by Scuba Diving
Powered by NewsLook.com
California Drought Renews Thirst for Desalination Plants

California Drought Renews Thirst for Desalination Plants

Reuters - US Online Video (Apr. 16, 2015) — As California&apos;s water crisis deepens, a one billion dollar desalination plant is set to go on-line near San Diego. Nathan Frandino reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins