Yahoo News 16 Jan 08;
The predatory crown of thorns starfish is threatening Indonesia's portion of the "coral triangle," the richest area of coral reef biodiversity on the planet, scientists warned Tuesday.
The starfish have been discovered in large numbers by researchers from the Wildlife Conservation Society and the Australian-based ARC Centre of Excellence for Coral Reef Studies, who surveyed reefs around Halmahera in Indonesia's Maluku Islands, a press release said.
The triangle lies between Indonesia, Malaysia, the Philippines, Papua New Guinea and the Solomon Islands and contains more than half the world's reefs, considered building blocks for marine life.
More than 600 species of coral -- 76 percent of those known -- and more than 3,000 plant and fish species live in the triangle's waters.
Scientists said they feared the growth in numbers of the starfish was caused by poor water quality and could be an early warning of widespread reef decline.
"We witnessed a number of active outbreaks of this coral predator. There was little to suggest that the reefs have been much affected by climate change as yet. The threats appear far more localised," said Andrew Baird from the Centre of Excellence in the statement.
The starfish feeds on coral by spreading its stomach over them and using digestive enzymes to liquify tissue.
Researchers also saw evidence of blast-fishing which had occurred following communal violence in recent years.
"The good news is that the reef fish assemblages are still in very good shape," said the Wildlife Conservation Society's Tasrif Kartawijaya. "So these reefs have the capacity to recover if we can address the current threats."
The Coral Triangle Initiative announced by six regional governments at last year's climate change conference in Bali "offers hope for the reefs in the region," the researchers said.
They said however that the role of research under the initiative, which they see as crucial in working out how to respond to threats on the reef, should be made clearer.
The initiative aims to establish a network of protected marine zones, to decrease wear and tear on the reefs caused by the fishing industry and to promote eco-tourism.
Marine resources in the coral triangle provide a living for 120 million people and one-third of the world's tuna catches come from the area.
Starfish Outbreak Threatens 'corals Triangle' Off Indonesia; 'We Witnessed A Number Of Active Outbreaks'
Underwatertimes.com News Service 14 Jan 08
New York, New York (Jan 14, 2008 18:06 EST) Outbreaks of the notorious crown of thorns starfish now threaten the “coral triangle,” the richest center of coral reef biodiversity on Earth, according to recent surveys by the Bronx Zoo-based Wildlife Conservation Society and ARC Centre of Excellence for Coral Reef Studies.
The starfish – a predator that feeds on corals by spreading its stomach over them and using digestive enzymes to liquefy tissue – were discovered in large numbers by the researchers in reefs in Halmahera, Indonesia, at the heart of the Coral Triangle, which lies between Indonesia, Malaysia, the Philippines, Papua New Guinea and the Solomon Islands. It is considered the genetic fountainhead for coral diversity found on Australia’s Great Barrier Reef, Ningaloo and other reefs in the region.
Scientists fear the outbreak is caused by poor water quality and could be an early warning of widespread reef decline.
Recent surveys of Halmahera by the Wildlife Conservation Society and ARC Centre of Excellence for Coral Reef Studies confirmed that while Halmahera’s reefs are still 30-50 percent richer than nearby reefs, some areas were almost completely destroyed.
“The main cause of damage to the corals was the Crown of Thorns Starfish,” Dr. Andrew Baird of the ARC Centre of Excellence for Coral Reef Studies and James Cook University. “We witnessed a number of active outbreaks of this coral predator. There was little to suggest that the reefs have been much affected by climate change as yet: the threats appear far more localized.”
The team also saw first-hand evidence of recent blast-fishing, an extremely destructive fishing practice that uses explosives. According to locals this accompanied a break down of law and order following communal violence in 2000-2003. During the same time many reef lagoons were mined of their corals for use in construction, an activity encouraged by the Indonesian military.
“This is clearly a complex human environment and effective management of the marine resources must address the needs of communities. It will also be vitally important to understand the causes of conflict among communities and address them,” says Dr Stuart Campbell, Program Leader for the Wildlife Conservation Society’s’ Marine Program in Indonesia.
The researchers pointed out that there were still healthy populations of certain species – and still time to reverse the damage.
“The good news is that the reef fish assemblages are still in very good shape” said Tasrif Kartawijaya from WCS-IP. “We saw Napoleon wrasse and bumphead parrot fish at almost every site. So these reefs have the capacity to recover if we can address the current threats.”
The Coral Triangle Initiative (CTI) announced by six regional governments at the Bali Climate Change Conference recently offers hope for the reefs in the region, the researchers say. However, there are few details of how it will work and no mention of the fundamental role of research in the conservation program.
“We are disappointed research is yet to be fully considered in the CTI. The success of large marine parks, like the Great Barrier Reef Marine Park, is largely due to the primary role of science plays in understanding what’s going on, so managers can make good decisions,” said Dr Baird.
“It isn’t enough just to document the diversity of the region. Large scale research is required to understand the Coral Triangle ecosystems and work out how best to respond to threats such as poor water quality and overexploitation,” Dr Campbell added.
