sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : Study shows Ozone hole UV impacting marine life
Study shows Ozone hole UV impacting marine life

'Ozone hole - Ocean Institute University of Western Australia'   
Ultraviolet radiation has caused a steep increase in deaths among marine animals and plants, according to an international team including scientists at the Oceans Institute of The University of Western Australia.

The team synthesised 1784 published experiments on marine organisms around the world to evaluate the magnitude of impacts caused by increased ultraviolet B radiation (UVB) in a study published today in the journal Global Ecology and Biogeography. Until now, the role of UVB radiation as a possible cause of the global decline in the health of marine ecosystems had not been quantified.

The marine life most affected by UVB are protists (such as algae), corals, crustaceans and fish larvae and eggs, thereby affecting marine ecosystems from the bottom to the top of the food web.

Since the 1970s, a continuous emission of fluorocarbon compounds (CFCs) has led to the reduction of the stratospheric ozone layer and consequent elevated levels of UVB, particularly in the Southern Hemisphere.

Winthrop Professor Carlos Duarte, Director of the UWA Oceans Institute and co-author, said the impact of increased UVB radiation had not been fully addressed to date because of two key misconceptions - that the Montreal Protocol (first signed in 1987) 'fixed' the ozone layer and that UVB does not penetrate to significant depths in ocean waters.

'Whereas the Montreal Protocol was effective in preventing further deterioration of the ozone layer, this has not yet recovered, and now we know that damaging UVB radiation can penetrate to considerable depths in clear ocean waters,' Professor Duarte said.

Today's study builds on evidence of considerable impacts of UVB radiation on marine plankton and ocean processes. The research was coordinated by UWA Professor Susana Agustí.

'The effects of ultraviolet radiation detailed in this study mainly affect organisms growing near the ocean surface, such as eggs and larvae of invertebrates and fish, which are exposed to very high UVB levels,' Professor Agustí said.

'Our results provide evidence that marine organisms in the Southern Hemisphere are more resistant to elevated UVB radiation than those in the Northern Hemisphere, and that resistance of organisms in the Southern Hemisphere has increased over time. These observations suggest that high mortality of sensitive marine organisms in the Southern Hemisphere, where UVB levels have increased the most, has already selected for the more resistant organisms.

'The experiments included in this research involve organisms and species that have survived after the erosion of the ozone layer caused by CFCs. Therefore, the results suggest that an increase in UVB radiation could have a heavy impact on marine biota. A clear evidence of this impact is the reduction of mortality rates of up to 81 per cent when reducing exposure to UVB present in larvae of commercial fish such as cod, anchovies and other organisms.

'Our results strongly suggest that increased UVB radiation over the past four decades may be a hidden driver of the widespread decline of marine life, from corals to fish, often attributed to other pressures, such as climate warming, overfishing and other impacts.'

The Spanish National Research Council and the Catholic University of Chile were also involved in the research.

University of Western Australia website


by Ocean Institute University of Western Australia

  

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

http://www.sail-world.com/index.cfm?nid=100251

11:06 PM Fri 27 Jul 2012GMT


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







News - USA and the World









International Moth Worlds: Rashley ahead as Aussies close in by Mark Jardine / YachtsandYachting.com,


















International Moth Worlds - Mothballed on day 4 + Video by Mark Jardine / YachtsandYachting.com,




Gladwell's Line: A change of direction needed in the America's Cup *Feature by Richard Gladwell/Sail-World.com/nz,
























Anna Tunnicliffe set to compete at the CrossFit Games by Anna Tunnicliffe, Pittsburgh, PA












U.S. Junior Women’s Singlehanded Championship - Sophia Reineke wins
BIC Techno 293 Worlds 2014 - Day 0 Opening
Fuerteventura World Cup - Slalom action highlights day 2
2014 Governor's Cup - Sam Gilmour of RFBYC victorious again
Farr 40 West Coast Champ - Skipper Alberto Rossi leads Enfant Terrible
Flying Dutchman World Championships - Magyars are the Masters
Final day shakes up standings at Cape Panwa Hotel Phuket Raceweek
2014 -15 Volvo Ocean Race: Team Alvimedica pushing towards Southampton
NYYC Race Week - Saving the best for last
VX One North American Championship - Chris Alexander commands
2014 Cape Panwa Hotel Phuket Raceweek - Waiting game on Day 3
International Moth Worlds: Thunderstorms delay racing on Day 1
Fuerteventura World Cup - Impressive tricks on day 1
2014 Governor's Cup - Two former winners in the finals
America's Cup: Iain Murray explains reasons for Australian withdrawal *Feature
Wilson and Roble remain number one match racers in U.S.
2014 ISAF Youth Match Racing World Championship - Set to start
PWA Pozo World Cup - Moreno twins dominate home spot
ISAF Youth Worlds - Record breaking regatta in Tavira + Video
Melges 32 European Championship - Robertissima remains out front
Farr 40 West Coast Championship - Italians take one-point lead   
Melges 32 European Championship - Day 3 images by Carlo Borlenghi   
New York Yacht Club Race Week - Marstrom 32 fleet off to anxious start   
Melges 32 European Championship - Day 3 images by Max Ranchi   
CYC Race to Mackinac - Cruising fleet sets sail in 106th edition   
Team Alvimedica getting a touchup   
PWA Pozo World Cup - Plenty of drama on day 5   
ISAF Youth Sailing World Championship - Day 5 Videos   
NYYC Race Week - High performance classes put on shoreside show   
2014 Pacific Cup - 'Invisible Hand' the first boat to finish   
Clipper Round the World Yacht Race - B.C.'s Eric Holden skippers wins   
America's Cup: Updates on Team Australia withdraw   
J/70 North American titles - Brian Keane moves to top of leaderboard   
2016-2017 America's Cup - Team Australia withdraws   
VX One North American Championship - Chris Alexander takes charge   
America's Cup: Team NZ disappointed, but on track after Australians go   
America's Cup: Hamilton Island decides not to proceed with Challenge.   
America's Cup: Challenger of Record withdraws from Regatta   
WWA Wakeboard National Championships head to Waco   
Farr 40 West Coast Championship - Day 2   


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 NEW US
LocalAds   DE  ES  FR  IT