Featured Research

from universities, journals, and other organizations

Acidification Of Sea Hampers Reproduction Of Marine Species

Date:
August 6, 2008
Source:
Vetenskapsrådet (The Swedish Research Council)
Summary:
By absorbing carbon dioxide from the atmosphere, and from the human use of fossil fuels, the world's seas function as a giant buffer for the Earth's life support system. The chemical balance of the sea has long been regarded as immovable. Today researchers know that the pH of the sea's surface water has gone down by 0.1, or 25 percent, just since the beginning of industrialization just over a century ago. This acidification process affects marine animal life.

The Austraian sea urchin
Credit: Image courtesy of Vetenskapsrådet (The Swedish Research Council)

By absorbing carbon dioxide from the atmosphere, and from the human use of fossil fuels, the world’s seas function as a giant buffer for the Earth’s life support system. The chemical balance of the sea has long been regarded as immovable.

Related Articles


Today, researchers know that the pH of the sea’s surface water has gone down by 0.1, or 25 percent, just since the beginning of industrialisation just over a century ago. Jon Havenhand and Michael Thorndyke, researchers at the University of Gothenburg, along with colleagues in Australia, have studied how this acidification process affects marine animal life.

As part of the study, which is one of the world’s first on this subject, they have allowed sea urchins of the species Heliocidaris erythrogramma to fertilise themselves in water where the pH has been lowered from its normal 8.1 to a pH value of 7.7. This means an environment three times as acidic, and corresponds to the change expected by the year 2100. The results are alarming.

Like most invertebrates, the sea urchin multiplies by releasing its eggs to be fertilised in the open water. However, in a more acidic marine environment, the sea urchin’s ability to multiply goes down by 25 percent, as its sperm swim more slowly and move less effectively. If fertilisation is successful, their larval development is disturbed to the extent where only 75 percent of the eggs develop into healthy larvae.

"A 25 percent drop in fertility is the equivalent of a 25 percent drop in the reproductive population. It remains to be seen whether other species exhibit the same effect, but, translated to commercially and ecologically important species such as lobsters, crabs, mussels and fish, acidification would have far reaching consequences,” says Jon Havenhand, a researcher from the Department of Marine Ecology working at the Sven Lovén Centre for Marine Sciences in Tjärnö.

The sea urchin studied by Jon Havenhand and Michael Thorndyke lives off the south coast of Australia. From a research point of view, the species is highly interesting, as its shell is made out of limestone, which is broken down in more acidic environments.

"Species with limestone skeletons or shells are hit particularly hard when the pH drops, through a drop in ability to grow and a rise in mortality. But, and it's a big but, we don’t yet know enough about the effects of acidification in the sea, and I hope I’m wrong about the wider consequences of our results,” says John Havenhand, who says that the need for more research on a global level is acute.

Research on the effects of acidification is being carried out with the support of the Swedish Research Council, FORMAS and the Australian Research Council. The article Near future levels of ocean acidification reduce fertilization success in a sea urchin is being published in the scientific periodical Current Biology.


Story Source:

The above story is based on materials provided by Vetenskapsrådet (The Swedish Research Council). The original article was written by Krister Svahn. Note: Materials may be edited for content and length.


Cite This Page:

Vetenskapsrådet (The Swedish Research Council). "Acidification Of Sea Hampers Reproduction Of Marine Species." ScienceDaily. ScienceDaily, 6 August 2008. <www.sciencedaily.com/releases/2008/07/080728111400.htm>.
Vetenskapsrådet (The Swedish Research Council). (2008, August 6). Acidification Of Sea Hampers Reproduction Of Marine Species. ScienceDaily. Retrieved March 29, 2015 from www.sciencedaily.com/releases/2008/07/080728111400.htm
Vetenskapsrådet (The Swedish Research Council). "Acidification Of Sea Hampers Reproduction Of Marine Species." ScienceDaily. www.sciencedaily.com/releases/2008/07/080728111400.htm (accessed March 29, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Sunday, March 29, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Raw: Lioness Has Rare Five-Cub Litter

Raw: Lioness Has Rare Five-Cub Litter

AP (Mar. 27, 2015) — A lioness in Pakistan has given birth to five cubs, twice the usual size of a litter. Queen gave birth to two other cubs just nine months ago. (March 27) Video provided by AP
Powered by NewsLook.com
Jockey Motion Tracking Reveals Racing Prowess

Jockey Motion Tracking Reveals Racing Prowess

Reuters - Innovations Video Online (Mar. 26, 2015) — Using motion tracking technology, researchers from the Royal Veterinary College (RVC) are trying to establish an optimum horse riding style to train junior jockeys, as well as enhance safety, health and well-being of both racehorses and jockeys. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Bear Cubs Tumble for the Media

Bear Cubs Tumble for the Media

Reuters - Light News Video Online (Mar. 26, 2015) — Two Andean bear cubs are unveiled at the U.S. National Zoo in Washington, D.C. Alicia Powell reports. Video provided by Reuters
Powered by NewsLook.com
Botswana Talks to End Illegal Wildlife Trade

Botswana Talks to End Illegal Wildlife Trade

AFP (Mar. 25, 2015) — Experts are gathering in Botswana to try to end the illegal wildlife trade that is decimating populations of elephants, rhinos and other threatened species. Duration: 01:05 Video provided by AFP
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