Featured Research

from universities, journals, and other organizations

Small Sea Creatures May Be The 'Canaries In The Coal Mine' Of Climate Change

Date:
February 23, 2008
Source:
University of California - Santa Barbara
Summary:
As oceans warm and become more acidic, ocean creatures are undergoing severe stress and entire food webs are at risk, according to molecular ecologists. Biologists have just returned from a research mission to Antarctica where they collected pteropods, tiny marine snails the size of a lentil, that one biologist refers to as the "potato chip" of the oceans because they are eaten widely by so many species.

Microscope photo of a pteropod (pelagic snail).
Credit: Photo by D.Forcucci

As oceans warm and become more acidic, ocean creatures are undergoing severe stress and entire food webs are at risk, according to scientists at a press briefing this morning at the annual meeting of the American Association for the Advancement of Science in Boston.

Gretchen Hofmann, associate professor of biology at the University of California, Santa Barbara, has just returned from a research mission to Antarctica where she collected pteropods, tiny marine snails the size of a lentil, that she refers to as the "potato chip" of the oceans because they are eaten widely by so many species.*

Pteropods are eaten by fish that are in turn consumed by other animals, such as penguins. As these small creatures are stressed by an increasingly acidic ocean, due to the build-up of carbon dioxide in the atmosphere, they are less able to cope with a warmer ocean.

"These animals are not charismatic but they are talking to us just as much as penguins or polar bears," said Hofmann. "They are harbingers of change. It's possible by 2050 they may not be able to make a shell anymore. If we lose these organisms, the impact on the food chain will be catastrophic."

Hofmann is a molecular ecologist who studies how genes go off and on as certain marine animals work to make their calcium carbonate shells from the seawater they live in. She characterized her recent trip to Antarctica as an urgent research mission.

She has performed extensive studies of the sea urchin that lives in the kelp forests of California. Sea urchins are a vital part of the food web and play a major economic role in California fisheries, since the roe of the sea urchin is a valuable sushi called "uni."

Hofmann explained that as marine invertebrates deal with increasing acidity, the larvae have to "re-tune" their metabolism in order to still make a shell. But this is done at a cost. The physiological changes that are a response to the acidity make the animals less able to withstand warmer waters, and they are smaller.

"These observations suggest that the 'double jeopardy' situation ---- warming and acidifying seas ---- will be a complex environment for future marine organisms," she said.

Hofmann is studying levels of carbon dioxide that would result from what the Intergovernmental Panel on Climate Change (IPCC) predicts would occur if humanity continues on a "business as usual" scenario projected out to the year 2100.

*The National Science Foundation's Office of Polar Programs funded the expedition.


Story Source:

The above story is based on materials provided by University of California - Santa Barbara. Note: Materials may be edited for content and length.


Cite This Page:

University of California - Santa Barbara. "Small Sea Creatures May Be The 'Canaries In The Coal Mine' Of Climate Change." ScienceDaily. ScienceDaily, 23 February 2008. <www.sciencedaily.com/releases/2008/02/080217102122.htm>.
University of California - Santa Barbara. (2008, February 23). Small Sea Creatures May Be The 'Canaries In The Coal Mine' Of Climate Change. ScienceDaily. Retrieved September 22, 2014 from www.sciencedaily.com/releases/2008/02/080217102122.htm
University of California - Santa Barbara. "Small Sea Creatures May Be The 'Canaries In The Coal Mine' Of Climate Change." ScienceDaily. www.sciencedaily.com/releases/2008/02/080217102122.htm (accessed September 22, 2014).

Share This



More Plants & Animals News

Monday, September 22, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: San Diego Zoo Welcomes Cheetah Cubs

Raw: San Diego Zoo Welcomes Cheetah Cubs

AP (Sep. 20, 2014) The San Diego Zoo has welcomed two Cheetah cubs to its Safari Park. The nearly three-week-old female cubs are being hand fed and are receiving around the clock care. (Sept. 20) Video provided by AP
Powered by NewsLook.com
Chocolate Museum Opens in Brussels

Chocolate Museum Opens in Brussels

AFP (Sep. 19, 2014) Considered a "national heritage" in Belgium, chocolate now has a new museum in Brussels. In a former chocolate factory, visitors to the permanent exhibition spaces, workshops and tastings can discover derivatives of the cocoa bean. Duration: 01:00 Video provided by AFP
Powered by NewsLook.com
Could Grief Affect The Immune Systems Of Senior Citizens?

Could Grief Affect The Immune Systems Of Senior Citizens?

Newsy (Sep. 19, 2014) The study found elderly people are much more likely to become susceptible to infection than younger adults going though a similar situation. Video provided by Newsy
Powered by NewsLook.com
Jury Delivers Verdict in Salmonella Trial

Jury Delivers Verdict in Salmonella Trial

AP (Sep. 19, 2014) A federal jury has convicted three people in connection with an outbreak of salmonella poisoning five years ago that sickened hundreds of people and was linked to a number of deaths. (Sept. 19) Video provided by AP
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:
from the past week

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