Thanks to the efforts of local resident Pak Dodent, coral destroyed around Sumatra by the 2004 tsunami is now making a remarkably recovery.

Dodent lives on the island of Pulau Wey off the north coast of Sumatra and the narrow channel between his small village Ibioh and a nearby island was particularly devastated by the enormous forces unleashed by the tsunami.

“It was like a washing machine out there and all of the coral was broken,” Dodent explained to a reporter from the Telegraph. Afterwards I thought to myself what can I do to make the coral grow again and I started to experiment.“

After some experimentation, Dodent decided to aid the corals by dropping concrete mounds over the sandy bottom, since reef building corals need a suitable surface to attach them selves to. He creates the concrete mounds by pouring concrete into a bucket, and he also embeds a plastic bottle or tube into the concrete so that a part of the plastic sticks up.

When the concrete is set, the devoted reef gardener drops his mounds by boat in the shallow waters near the beach and leaves them there for a month to allow any potentially harmful chemicals present in the concrete to dissipate. After that, he carefully begins to transplant corals to the mounds by harvesting small patches of corals from the healthy reef on the far side of the island. “I am careful to only take a little from here and there so that I don’t affect the healthy eco system”, says Dodent.

Dodent uses cable ties to attach the transplants to the plastic bottles and tubes to prevent the corals from being dislocated by water movements.

Almost four years after the tsunami, Dodent’s coral garden is now covered with coral and has attracted an abundance of fishes and other animals. The coral is thriving and there is virtually impossible to the underlying concrete mounds. The garden currently comprises over 200 square metres and is home to over 25 different species of coral.

To prevent algae from overgrowing the new coral and killing it, Dodent regularly cleans infested coral patches with a toothbrush, but fishes and other coral eating organisms will soon alleviate him of this task. “I monitor and clean it for one year, after that it is up to the fishes,” he says.

Dodent has now recently received a small grant from Fauna and Flora International to develop his project.

According to University of Queensland marine biologist Professor Ove Hoegh-Guldberg, recipient of the prestigious Eureka science prize in 1999 for his work on coral bleaching, sea temperatures are likely to rise 2 degrees C over the next three decades due to climate change and such an increase will cause Australia’s Great Barrier Reef to die.

Hoegh-Guldberg’s statement is now being criticized by other scientists for being overly pessimistic, since it does not consider the adaptive capabilities of coral reefs. According to Andrew Baird, principal research fellow at the Australian Research Council’s Centre for Excellence for Coral Reef Studies, there are serious knowledge gaps when it comes to predicting how rising sea temperatures would affect the coral.

Great barrier reef

“Ove is very dismissive of coral’s ability to adapt, to respond in an evolutionary manner to climate change,” says Dr Baird. “I believe coral has an underappreciated capacity to evolve. It’s one of the biological laws that, wherever you look, organisms have adapted to radical changes.”

According to Dr Baird, climate change would result in major alterations of the reef, but not necessarily death since the adaptive qualities of coral reefs would mitigate the effects of an increased water temperature. “There will be sweeping changes in the relative abundance of species,” he says. “There’ll be changes in what species occur where. But wholesale destruction of reefs? I think that’s overly pessimistic.”

Marine scientist Dr Russell Reichelt, chairman of the Great Barrier Reef Marine Park Authority, agrees with Dr Baird. “I think that he’s right,” says Dr Reichelt. “The reef is more adaptable and research is coming out now to show adaptation is possible for the reef.”

Professor Hoegh-Guldberg responds to the criticism by saying that the view “that reefs somehow have some magical adaptation ability” is unfounded. He also raises the question of how big of a risk we are willing to take. “The other thing is, are we willing to take the risk, given we’ve got a more than 50 per cent likelihood that these scenarios are going to come up?” professor Hoegh-Guldberg asks.”If I asked (my colleagues) to get into my car and I told them it was more than 50 per cent likely to crash, I don’t think they’d be very sensible getting in it.“

The proposed Coral Sea marine park is now one step closer to becoming a reality – it has gained support from Coral Sea fishermen. According to Bundaberg fisherman Seth Parker, all of the 16 Coral Sea license holders support the proposal and are willing to let the Commonwealth buy back their permits. “They would buy the whole lot out for 25 to 30 million [dollars] and we would leave this pristine area,” Parker says to ABC News.

In an earlier post, we wrote about President Bush’s proposal to create the largest protected marine area in the world in the Pacific Ocean.

A group of scientists, environmental groups, and former members of Australia’s navy are now calling for the creation of another reserve that would ban fishing in a whopping 400,000 square mile area off Australia’s northeast coast.

Coral at the Great barrier reef, Australia

It will sure be interesting to see if these two suggestions will become a reality, and if so, which of the protected areas that will ultimately become the largest protected marine area in the world. When discussing protected areas it is also important to keep in mind that the term “protected” can mean very different things.

The proposed protected area off of Australia’s northeast coast is known as the Coral Sea. It is a so called marginal sea, which means that it is a part of an ocean partially enclosed by land, e.g. by archipelagos and peninsulas. The Coral Sea is bordered by the east coast of Queensland to the west, by the Vanuatu archipelago and New Caledonia to the east, and by the Solomon Islands to the north.

The Coral Sea Basin is believed to have been formed between 58 and 48 million years ago when the Queensland continental shelf was lifted up by tectonic forces. The sea is not only famous for its rich biodiversity; it is of cultural significance as well and was for instance the location of a famous battle during World War II.

The effort to create a no-take marine park in the Coral Sea is headed by the Pew Environment Group. You can find more information about the initiative on their site.

A group of scientist from UK, Australia, the US, Sweden and France are arguing that we need to rethink how we protect our marine environment if we want to protect our reefs. The way we protect vulnerable areas today will not suffice to save the coral reefs from the threat of global warming.

The type of small protected areas that we use today were designed by researchers in the 60s and 70s and is good to prevent species from going extinct due to fishing etc but are not enough to protect against the treats reefs are facing today like global warming. This is the conclusion they have reached after extensive studies carried out in over 66 sites across seven countries over more than a decade. The team has published their result in the journal PLoS ONE. The study is the biggest of its kind done to date.

It is however important to stress that they don’t think the present protected areas are to be removed or that new such areas shouldn’t be protected. What they are saying is that this work has to be complemented with a new type of protected areas that need to be located in the right places.

Lead researcher Nick Graham, of Newcastle University’s School of Marine Science and Technology, said: “We need a whole new approach – and we need to act now.

The research the scientist did shows that the location of the protected areas are very important and that many of the world’s existing protected areas are in the wrong place to protect the reefs. New protected areas need to be setup in new locations and the focus need to change from protecting small areas to protecting entire reef systems. It is important to minimize the human impact on the reefs from actions such as over-fishing, pollution and sedimentation as coral dies if they are put under to much stress. If we remove other sources of stress the reef becomes more likely to survive the stress caused by increased water temperature caused by global warming.

Although the research seems to show a grim future with a lot of reef being damaged and showing signs of long-term degradation there were also good signs with some reefs remaining healthy or even recovering from earlier damages.

Scuba diving tourists are an important source of income for Egypt, but now the tourism sector might be sawing off the branch on which they’re sitting by over-exploiting the sensitive coral reefs of the Red Sea. According to a study by Hasler and Ott, heavily dived dive sites near the town of Dahab have a significantly lower level of coral cover compared to areas without recreational diving.

Located off the south-eastern coast of the Sinai Peninsula, the reefs of Dahab is one of Sinai’s most treasured and well visited diving destinations. Dahab is still a fairly small town, but it is situated no more than 80 km (50 miles) from Sharm el-Sheik, a bustling tourist hub which attracts tens of thousands of visitors each year. Some of the dive sites off Dahab are among the world’s most heavily dived sites with over 30,000 dives per year.

According to Hasler and Ott, heavily dived sites in the studied area exhibited a reduced coral cover compared to non-dived sites and there were also significantly higher levels of broken and damaged corals. Differences could also be observed within the same reef, with coral communities located on reef crest areas being significantly more damaged than coral communities growing on reef slopes.

Divers are not only causing trouble by damaging corals directly; they can also stir up the sand around the reefs, thereby promoting sedimentation on top of the corals. Attached corals cannot free themselves of sediment particles and being covered in sand is therefore very dangerous for them.

In order to combat the problems faced by heavily exploited reefs, Hasler and Ott have suggested implementing ecologically sustainable dive plans for individual sites and limiting the total amount of dives per year. According to the authors, it is also very important to educate dive guides and divers.

For more info, read the results of the study which are due to be published shortly in Marine Pollution Bullentine. “Hasler H and JA Ott (2008) – Diving down the reefs? Intensive diving tourism threatens the reefs of the Northern Red Sea. Marine Pollution Bulletin, 2008 Aug.”