Please select your home edition
Edition
InSunSport - International - Tough

Nemo's home under threat from bleaching and rising temperatures

by Media Services on 22 Aug 2013
Reef HQ carpet anemone and clown fish Reef HQ Townsville http://www.reefhq.com.au
Sea anemones, home to the clown fish, the charismatic star of 'Finding Nemo', and as many as 27 other species, are facing the same worldwide threat as coral reefs – bleaching and loss due to rising water temperatures.

Research by an international team of marine scientists shows that at least seven of the 10 anemone species suffer from bleaching when water temperatures get too high.

The researchers, from Australia, Saudi Arabia and the USA surveyed nearly 14,000 anemones worldwide and found 4 per cent were bleached. However bleaching rates ranged from 20-100 per cent, following five major bleaching episodes.

Dr Ashley Frisch of the ARC Centre of Excellence for Coral Reef Studies at James Cook University was co-author of the report. 'We found bleaching of anemones occurring wherever we looked – from the Red Sea and Indian Ocean to the Indo-Australian region and the Pacific. Sometimes it was on a massive scale.'

The bleaching appears to be due to the same cause as coral bleaching – loss of the anemone’s symbiotic algae, which supply an important part of its nourishment. This happens when the surrounding water becomes too warm.

But it also involves the loss of the brightly coloured fishes which the anemone protects – and which in turn protect it. The result is a collapse in the delicate three-way partnership between algae, anemone and fish.

Bleaching causes the loss of anemonefish, like Clown Fish, which have nowhere to hide and without the anemones to protect them are quickly gobbled up by predators.

Because the fish appear to perform useful services for the anemone like protecting them from grazing fish, it may also be that the loss of anemonefishes following a bleaching event means the anemones themselves are much less likely to recover.


'Anemones are naturally tough and live for many years. As a result their rates of reproduction are slow – and when they are hit by a killer bleaching event, it can result in their complete loss from an area over a period of time. It appears they cannot reproduce fast enough to make good the loss, especially if the fish are also gone,' Dr Frisch explains.

Dr Frisch says that apart from their roles in coral ecosystems, anemones and their fish are of economic importance to both tourism and the aquarium trade, and many poor coastal communities depend on the income they bring.
They conclude that in some areas, anemone 'population viability will be severely compromised if anemones and their symbionts cannot acclimatise or adapt to rising sea temperatures.

The study concludes 'If host anemones (and their symbiotic algae) cannot acclimate or adapt to rising sea temperatures, then populations of host anemones and associated anemonefishes are anticipated to decline significantly.'

More at www.plos.org

Colligo Marine 660x82Barz Optics - FloatersBakewell-White Yacht Design

Related Articles

Zhik sailors win 60% of medals at 2016 Olympic Regatta
The 2016 Olympic games are over and what a Games they have been - Zhik sailors dominated The 2016 Olympic games are over and what a Games they have been! Zhik sailors won 60% of the medals contested at Rio de Janeiro. It was a regatta which tested sailors and gear - with one day being the most severe conditions ever experienced at an Olympic regatta.
Posted on 29 Aug
Zhik sailors win 60% of medals at 2016 Olympic Regatta
The 2016 Olympic games are over and what a Games they have been - Zhik sailors dominated The 2016 Olympic games are over and what a Games they have been! Zhik sailors won 60% of the medals contested at Rio de Janeiro. It was a regatta which tested sailors and gear - with one day being the most severe conditions ever experienced at an Olympic regatta.
Posted on 29 Aug
PredictWind - One stop shop
PredictWind have taken the bold step of adding government provided forecasts to their award winning forecasting software PredictWind the world leader in forecasting believe that more is better, and have taken the bold step of adding government provided forecasts to their award winning forecasting software.
Posted on 15 Aug
Marine Resources job updates
Marine Resources specialises in providing expert recruitment services to the leisure marine industry worldwide. Marine Resources specialises in providing expert recruitment services to the leisure marine industry worldwide. Jobseekers register your CV now to receive the latest vacancies and be matched to your ideal job. Employers choose from a variety of recruitment options which include a full consultancy service as well as a unique job advertising package.
Posted on 11 Aug
Rio official murdered ten months before the Olympics
Rio de Janeiro is a troubled city and a reeling Olympic host, but it will always have beautiful Guanabara Bay. Does an unsolved murder of an official in Rio in charge of cleaning up Guanabara Bay say a lot about the state of platy in the magical city? Priscilla Pereira was murdered 10 months ago and the thinking is that she was murdered in relation to her work
Posted on 31 Jul
America's Cup - Southern Spars to build AC50 for Emirates Team NZ
Southern Spars has been appointed to build Emirates Team New Zealand’s AC50 wingsailed foiling catamaran One of the world's leading composite engineering companies, Southern Spars has been appointed to build Emirates Team New Zealand’s AC50 wingsailed foiling catamaran for the 35th America’s Cup campaign. The move marks a shift away from Cookson Boats who have been Team New Zealand's boatbuilder since 2000. No reasons have been given for the decision to change the builder.
Posted on 24 Jul
Upffront.com - Tuff Luff and Harken Headfoils
Upffront.com is a comprehensive online purchasing platform for performance sailing hardware and rigging systems Upffront.com is a comprehensive online purchasing platform for performance sailing hardware and rigging systems; orders are processed 24 hours a day, 365 days a year and we deliver to customers located anywhere in the world.
Posted on 8 Jul
Barz floating sunglasses - Ideal for sailing in rough conditions
Our SAN JUAN floating model fitted with 1.1mm Acetate Lenses have a density of 0.95 GM/ML Barz floating sunglasses float in rough conditions. Most sunglasses that say they float, only float in the bathtub as once they break surface tension (or if there is any movement on top of the water)... down they go...
Posted on 7 Jul
Free $US3,000 Carbon Vang with SouthernFurl boom orders in July
Southern Spars is giving a free carbon vang - valued at US$3,000 - with SouthernFurl in-boom furlers ordered in July Southern Spars is giving away a free carbon vang - valued at US$3,000 - with all of their SouthernFurl in-boom furlers ordered in July. Carbon gas vangs make a great addition to the furling boom package, though if you’d prefer to keep your existing one, Southern Spars will offer you a 5% discount on the price of your boom instead.
Posted on 29 Jun
11th Hour Racing to present at annual Green Sports Alliance Summit
11th Hour Racing is headed to Houston, Texas, to present at the annual Green Sports Alliance Summit 11th Hour Racing is headed to Houston, Texas, to present at the annual Green Sports Alliance Summit, June 28-30, the world’s largest gathering for the sports community around sustainability, including both professional and collegiate sports teams, leagues and venues.
Posted on 25 Jun