sail-world.com
 
 
News Home Cruising Photo Gallery Video Gallery
Sail-World.com : Shocks could be used to aid recovery of degraded coral reefs
Shocks could be used to aid recovery of degraded coral reefs


'Coral dominated'    Arc Centre of excellence for coral reef studies
Shocks caused by climate and seasonal change could be used to aid recovery of some of the world’s badly-degraded coral reefs, an international team of scientists has proposed.

A new report by Australian and Swedish marine scientists in the journal Frontiers in Ecology and the Environment suggests that it may be possible to restore living coral cover to a badly-degraded reef system – though not easy.

coral dominatedWith 70 per cent or more of the world’s coral reefs now assessed as degraded, adopting a business-as-usual approach to how we use and manage reefs is no longer an option, says lead author of the report Nick Graham.

'We are unlikely to be able to keep many of the world’s reefs in a pristine state, but with good management we may be able to maintain them in a coral-dominated condition and in some cases we may be able to bring back reefs from a degraded state,' he explains.

The researchers have taken heart from examples on land in desertified landscapes; exceptional falls of rain, in combination with controls on grazing pressure, can result in widespread regrowth of natural vegetation.

They argue that coral reef managers may be able to take advantage of shocks like tropical storms, periods of cloudy weather or even strong seasonal effects on abundance to restore coral cover on degraded reefs.

'Normally we think of these shocks as damaging to coral reefs – but research suggests they are just as damaging to the organisms that can replace coral. In other words, they may act as a circuit-breaker that allows corals to regain control of a reef.'

The key to the new thinking is resilience: healthy corals reefs are naturally resilient to shocks – but damaged ones may become overgrown with sea weeds, and the corals vanish.

'Weed-dominated systems are pretty resilient too and, once established, it is very hard to restore the corals,' Dr Graham explains.Macroalgae dominated

'However a weed-dominated reef can be damaged by big storms too. Cloudy weather and seasonal changes in water temperature can also cause the weeds to die back.

Macroalgae dominated -  Arc Centre of excellence for coral reef studies  
'This dieback of weeds opens a window through which corals can re-establish.'

The key to bringing back corals is exactly the same as preventing coral cover being lost in the first place, Dr Graham says – reducing human impacts through regulation of fisheries and water quality. If reefs are prepared in this way, they may bounce back when a window for recovery opens.

Prof David Bellwood emphasized that 'When it comes to saving our coral reefs, prevention is always better than cure and early action is important to slow or reverse degradation.'

The researchers emphasize that both protection and recovery of the world’s coral reefs call for a fundamental change in how people interact with and use reef ecosystems.

'Until now, the focus has mainly been on conserving small parts of a reef in marine protected areas,' said Prof Bellwood, '- we’re talking about broader approaches to change the relationship between humans and coral reefs to reduce human impacts across the whole ecosystem.'

The paper concludes, 'Although the composition of coral reefs will likely continue to vary over time, it may be possible to maintain coral-dominated reefs and their associated ecosystem goods and services… Scientists and managers could take advantage of opportunities for change by harnessing shocks and natural variability as potential stimuli for beneficial shifts in ecosystem states.'

The paper 'Managing resilience to reverse phase shifts in coral reefs' by Nicholas AJ Graham, David R Bellwood, Joshua E Cinner, Terry P Hughes, Albert V Norström and Magnus Nyström appears in the journal Frontiers in Ecology and the Environment.

For more information visit ARC Centre of Excellence Website


by ARC Centre of Excellence

  

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

http://www.sail-world.com/index.cfm?nid=115007

10:29 AM Wed 25 Sep 2013GMT


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







News - USA and the World



470 Men and Women Worlds - Champions decided in Santander by International 470 Class Association,














































Big Boat Series - It's not the size, it's the length by Erik Simonson, Pressure-Drop.US,


















2014 Chicago Match Cup - Four go through to quarter finals
470 Men and Women Worlds - Champs take over leaderboard
ISAF Sailing World Champ - Buckingham finishes with career-best result
America's Cup: Oracle's Larry Ellison to step down as CEO
Classic Yacht Regatta - Sonny takes top classic prize
ISAF Sailing Worlds, Santander - Buckingham finishes with career best
ISAF Sailing Worlds, Santander - Rio 2016 RS:X spots claimed
ISAF Sailing Worlds - Leaderboards shaping up in Santander + Video
ISAF Sailing Worlds, Santander - Giles Scott continues to extend lead
ISAF Sailing Worlds, Santander - Day 7 images by Sailing Energy
ISAF Sailing Worlds - Laser and Radial winner images by Jesus Renedo
ISAF Sailing Worlds, Santander - Medal Race images by Sail-World.com
ISAF Sailing Worlds - Dutch dominate Laser and Radial in Santander
Royal Cup Marina Ibiza - Quantum Racing more than doubles overall lead
J/24 World Championship - Excitement builds for Newport racing
Volvo Ocean Race - Seb Marsset joins Team Alvimedica
Fall Seamanship training opportunities at New York Yacht Club
Rolex Big Boat Series: More images from San Francisco - Final Day
AWT Hatteras Wave Jam action commences on day 3
Rolex Big Boat Series: Images from San Francisco - Final Day
ISAF Sailing World Championships - Watch medal races live here   
Hobie 16 Open North American Championships and Pan Am Games qualifier   
ISAF Sailing World Championship - Videos from Santander   
ISAF Sailing Worlds: Buckingham into Medal Race, 470's stay consistent   
470 Men and Women Worlds - Vadlau and Ogar into pole position   
2014 Chicago Match Cup - Defending champion on top   
ISAF Sailing Worlds, Santander - Strong competition for RS:X fleets   
ISAF Sailing Worlds, Santander - Big breeze on day 6 + Video   
ISAF Sailing Worlds, Santander - Buckingham into Laser Medal Race   
U.S. Multihull Championship - Hobie Alter Trophy to be decided   
ISAF Sailing Worlds - The kind of form most sailors only dream about   
Royal Cup Marina Ibiza - Quantum Racing ahead of target   
ISAF Worlds Santander - 19 Rio 2016 Laser Radial spots awarded   
Santander 2014 ISAF Worlds - 21 broadcasters to take live coverage   
Rolex Swan Cup - Looking forward to the next 30 years   
America’s Cup: The Future is foiling – AC45s to be modified   
Volvo Ocean Race: Win a stopover trip by designing an ECsix T-Shirt   
Red Bull 49erFX: On the eve of the Worlds in Santander   
America's Cup: Ben Ainslie Racing launches partnership with Yamaha   
2014 Chicago Match Cup - Starts tomorrow   


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