Navigation Links
Elevated water temperature and acidity boost growth of key sea star species: UBC researchers
Date:6/1/2009

New research by zoologists at the University of British Columbia indicates that elevated water temperatures and heightened concentrations of carbon dioxide can dramatically increase the growth rate of a keystone species of sea star.

The study is one of the first to look at the impact of ocean acidification on marine invertebrates that don't have a large calcified skeleton or external shell, and challenges current assumptions about the potential impact of climate change on marine species.

The findings were published online this week in the Proceedings of the National Academy of Sciences.

In the lab, UBC researchers led by Rebecca Gooding manipulated water temperatures and CO2 levels in sea water tanks containing juvenile Purple Ochre Sea Stars (Pisaster ochraceus), a species found along much of North America's Pacific Coast.

An increase in temperature of just three degrees and doubling of CO2 concentrations enabled the sea stars to grow almost twice as fast as they normally would over a period of 10 weeks.

"This means the sea stars could potentially reach adulthood in about half the time it would typically take -- and consume more mussels, their main diet, at much higher rates," says Gooding, a PhD student in the Department of Zoology working under the supervision of UBC Asst. Prof. Christopher Harley.

At the end of the period, sea stars reared in warmer, more acidic waters weighed 17 grams, compared to control sea stars that weighed an average of only 11 grams. In contrast, existing studies suggest that an increase in temperature and CO2 levels hinder growth in most species studied so farusually more calcified species.

"This complicates current assumptions. It looks like increased CO2 may not have negative effects on all marine invertebrates, suggesting that predicting the impact of climate change should consider how different organisms respond to changing climatic variables."

The Purple Ochre Sea Star is a coldwater species of sea star that can be found anywhere from Alaska to Baja California. It is most commonly found in the northeastern Pacific. They can actually range in color from purple to orange to brown and have five rays that can range in length from 10 to 25 centimetres.

They are considered a keystone speciesa species that exerts a disproportionate effect on their ecosystem by preying on other animals.


'/>"/>

Contact: Chris Balma
chris.balma@science.ubc.ca
604-822-5082
University of British Columbia
Source:Eurekalert

Related biology news :

1. Landmark studies assess risk of exposure to elevated levels of EMS confirm clear toxicity threshold
2. Elevated carbon dioxide changes soil microbe mix below plants
3. Elevated nitric oxide in blood is key to high altitude function for Tibetans
4. Survey finds elevated rates of new asthma among WTC rescue and recovery workers
5. Toward cheap underwater sensor nets
6. Double trouble for water life
7. Monitoring water through a snakes eyes
8. Scientists urge global action to preserve water supplies for billions worldwide
9. Wind, salt and water are leading indicators of land degradation in Abu Dhabi
10. Better water use could reduce future food crises
11. Crop models help increase yield per unit of water used
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/20/2016)... 2016  VoiceIt is excited to announce its ... By working together, VoiceIt and VoicePass will ... VoicePass take slightly different approaches to voice biometrics, ... and usability. ... partnership. "This marketing and technology partnership ...
(Date:5/3/2016)... May 3, 2016  Neurotechnology, a provider of ... MegaMatcher Automated Biometric Identification System (ABIS) , a ... projects. MegaMatcher ABIS can process multiple complex biometric ... combination of fingerprint, face or iris biometrics. It ... and MegaMatcher Accelerator , which have ...
(Date:4/26/2016)... April 27, 2016 Research ... Multi-modal Biometrics Market 2016-2020"  report to their offering.  ... The analysts forecast the global multimodal ... 15.49% during the period 2016-2020.  Multimodal ... sectors such as the healthcare, BFSI, transportation, automotive, ...
Breaking Biology News(10 mins):
(Date:6/27/2016)... ... June 27, 2016 , ... Rolf K. Hoffmann, ... faculty of the University of North Carolina Kenan-Flagler Business School effective ... at UNC Kenan-Flagler, with a focus on the school’s international efforts, leading classes ...
(Date:6/24/2016)... June 24, 2016  Regular discussions on a range of ... between the two entities said Poloz. Speaking at ... Ottawa , he pointed to the country,s inflation target, ... government. "In certain ... institutions have common economic goals, why not sit down and ...
(Date:6/24/2016)... ... June 24, 2016 , ... Researchers at the Universita Politecnica delle Marche in ... peritoneal or pleural mesothelioma. Their findings are the subject of a new article on ... biomarkers are signposts in the blood, lung fluid or tissue of mesothelioma patients that ...
(Date:6/23/2016)... CAMBRIDGE, Mass. , June 23, 2016 /PRNewswire/ ... the development of novel compounds designed to target ... compound, napabucasin, has been granted Orphan Drug Designation ... in the treatment of gastric cancer, including gastroesophageal ... cancer stemness inhibitor designed to inhibit cancer stemness ...
Breaking Biology Technology: