>
 
FishingBoating-World.com
 
 
News Home Newsletters Photo Gallery Powerboat-World Australian Cruising World Cruising MarineBusiness-World Animated Knots
MarineBusiness-World Animated Knots Video Gallery MarineBusiness-World
Sail-World.com : Research reveals sea urchin adaptations to ocean acidification
Research reveals sea urchin adaptations to ocean acidification


'Melissa Pespeni injects sea urchin to induce spawning'    Dan Griffin
Stanford scientists have determined that some purple sea urchins residing along the coast of California and Oregon have the surprising ability to rapidly evolve in acidic ocean water – a capacity that may come in handy as climate change increases ocean acidity. This capacity depends on high levels of genetic variation that allow urchins’ healthy growth in water with high carbon dioxide levels.

The study, led by former Stanford postdoctoral fellow Melissa Pespeni and co-authored by Stanford Woods Institute Senior Fellow Stephen Palumbi, reveals previously unknown adaptive variations that could help some marine species survive in future acidified seas.

'It’s like bet hedging,' said Palumbi, director of Stanford’s Hopkins Marine Station. 'Betting on multiple teams in the NCAA playoffs gives you a better chance of winning. A parent with genetic variation for survival in different conditions makes offspring that can thrive in different environments. In an uncertain world, it’s a way to have a stake in the Final Four.'

Increasing acidification is a worrisome question for the billion people who depend on the ocean for their sustenance and livelihoods. Which sea creatures will survive in waters that have had their chemistry altered by global CO2 emissions from fossil fuels?

The authors, including collaborators at the University of California Davis’ Bodega Marine Lab, speculate in a research paper published in the Proceedings of the National Academy of Sciences that other marine species that have long dealt with environmental stresses may have a similar adaptive capacity.

If true, these capabilities could provide important clues about how to maintain robust marine populations amid the effects of acidification, climate change, overfishing and other human impacts.

Scientists have known for decades that high CO2 emissions from fossil fuels are increasing the levels of carbonic acid in the world's oceans, leading to increased acidity. Hundreds of studies have shown that acidification at levels expected by the year 2100 can harm ocean life.

But little is known about marine species’ capacity to adapt evolutionarily to this condition. The delicate embryos of marine species are especially susceptible. The West Coast oyster farm industry nearly collapsed in 2007 because of oyster larvae sensitivity to increased acidification of coastal waters.

The study examined how purple sea urchins – creatures with the most well-studied genome of any marine species – react to the acidification levels predicted for 2100.

The researchers raised larvae in ocean water with either low or high carbon dioxide content. They sampled the larvae at early and later stages in life then used new DNA-sequencing and analytical tools to determine what elements of the urchins’ genetic makeup changed through time in these conditions. By looking at the function of each gene that changed, researchers were able to pinpoint which types of genes were critical for survival under future conditions.

'The high CO2 larvae showed almost no negative effects, and that was a surprise,' said Pespeni. 'They didn’t suffer because among them were some individuals with the right genes to be able to grow well in those harsh conditions.'

Purple sea urchins, like other West Coast marine species, normally live in cold water that wells up along the coast, bringing seasonally higher CO2 levels. The study’s results suggest that this long-term environmental mosaic has led to the evolution of genetic variations enabling purple sea urchins to regulate their internal pH level in the face of elevated CO2.

'There are hundreds of west coast species that similarly evolved in these conditions. Maybe some of these have the genetic tools to resist acidification, too,' Palumbi said. 'We need to learn why some species are more sensitive than others.'

Stanford Woods website


by Rob Jordan

  

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

http://www.fishingboating-world.com/index.cfm?nid=108397

7:53 PM Sat 13 Apr 2013GMT


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







FishingBoating-World













































From Penguins to Polar Bears by Cherie Winner,






Polar research: Six priorities for Antarctic science by Mahlon C. Kennicutt II and colleagues,
















2015 Sydney Inte'l Boat Show - Boating Industry commences planning
John Hemingway joins anglers for upcoming Wahoo Smackdown V
Dangerous conditions for boaters from this evening
Pacific Boating membership offers hassle-free boating *Feature
Marine15 expands trade, networking and B2B opportunities *Feature
2014 Auckland on the Water Boatshow - Huge prize packs up for grabs
Sustainable Seafood - How to purchase with confidence
4X4 Outdoors Show and Fishing and Boating Expo wows water lovers
Fishers encouraged to refresh knowledge of size and possession limits
Newly discovered Juvenile Whale Shark Aggregation in the Red Sea
Risks to penguin populations continues
Dangerous conditions for boaters from this afternoon
NSW Environment Minister awards 'Fish Friendly' Marina Accreditations
Gold Coast International Marine Expo - High-Diver Steve Black is back
Discover science of maritime exploration at National Maritime Museum
4x4 Outdoors Show, Fishing and Boating Expo - Campfire cooking corner
More than 1,000 jungle perch fingerlings reared
Don’t get in a tangle using illegal nets
See the heat with FLIR ONE *Feature
John Temple to retire, Will Sangster appointed General Manager
Multihull Central launches Aquila range at SIBS *Feature   
Dredging link to WA coral disease   
Erin Loscocco, the foiling fisherman   
Sydney International Boat Show - Days 3 & 4 *Feature   
Endangered species are like Movie Stars - Charlie Sheens and Tom Hanks   
Shellfish reefs in Port Phillip Bay to be rejuvenated   
2014 Brisbane Boat Show - What's your trailer boat worth?   
Operation GrindStop 2014   
Big Dog Fat Cat Fishing Tournament - Big catches hauled in   
Sydney International Boat Show - Day 2 *Feature   
Marine Rescue volunteers celebrate new unit and $120,000 vessel   
Inspections increased by QBFP to safeguard fishing industry   
Sydney International Boat Show - images from Day 1 *Feature   
Pantaenius Insurance - being seen in yellow, green and orange *Feature   
Sydney International Boat Show begins!   
Sydney International Boat Show - Changed conditions on Sydney Harbour   
Fraser Island annual fishing closure starts August 1   
Gold Coast Broadwater no closer to welcoming supermaxis *Feature   
Sydney International Boat Show - all systems go!   
EOMAP modelling shows what's under our water   


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 VIR FBW
LocalAds   DE  ES  FR  IT