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Home»Advocacy»>Mass coral bleaching closes dive sites, threatens future of world’s most diverse marine region – WWF
Advocacy

>Mass coral bleaching closes dive sites, threatens future of world’s most diverse marine region – WWF

Flow GalindezBy Flow GalindezJuly 30, 2010No Comments4 Mins Read
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>Mass coral bleaching caused by global warming is threatening the health of the Coral Triangle, a vast marine region that is home to 76% of all known corals in the world.

Widespread bleaching has been reported along Anilao and Nasugbu in Batangas, plus Taytay in Palawan. The latter saw corals – which previously exhibited hues of deep green –turn temporary shades of pink, orange and yellow – a precursor to complete bleaching.

(Color Changes in Corals Prior to Complete Bleaching – WWF-Philippines)

Numerous other Philippine reefs are likely to have been affected as well, exacerbated by localized outbreaks of Crown-of-Thorns Seastars.

The Malaysian government recently closed portions of world-renowned dive sites on the tropical islands of Tioman and Redang, saying they would be off-limits until October to give the fragile coral reef ecosystems time to heal.

Widespread bleaching has also been recorded in Indonesia, with areas near Sabang, Aceh, Padang, Thousand Island Jakarta, Bali and many other locations.

“This widespread bleaching is alarming because it directly affects the health of our oceans and their ability to nurture fish stocks and other marine resources on which millions of people depend for food and income” says WWF Coral Triangle Programme Climate Change Strategy Leader Richard Leck.

Coral bleaching is a phenomenon caused by global warming. Increased seawater temperatures, which in some regions have risen as much as 2°C above the long-term average maximum, can push the algae living inside corals beyond the brink, causing reefs to eventually turn white and die.

Aside from increased sea temperatures, other causes of stress include disease, pollution, sedimentation, cyanide fishing, changes in salinity and storms.

The Coral Triangle region covers the seas of Indonesia, Malaysia, Papua New Guinea, the Philippines, Solomon Islands and Timor Leste. This nursery of the seas contains over 600 species of reef-building coral.

(Bleached Acropora Coral – WWF-Philippines & Lory Tan)

Since March this year, about 50 different organizations and individuals have reported signs of coral bleaching in the Coral Triangle region. Up to 100% bleaching on susceptible coral species have been reported, and in some areas, severe bleaching has also affected more resistant species.

The National Oceanic and Atmospheric Administration’s (NOAA) Coral Reef Watch stated that the current incident is the worst of it kind since 1997-1998, which decimated 16% of the world’s coral reefs.

With many areas showing signs of mass bleaching, it has become apparent that more weight needs to be put behind long-term conservation strategies, such as marine protected area management, preventing coastal and marine pollution as well as promoting sustainable fisheries.

“Well-designed and appropriately-managed networks of marine protected areas and locally managed marine areas are essential to enhance resilience against climate change, and prevent further loss of biodiversity, including fisheries collapse.” Leck added.

Through new sustainable finance mechanisms and investments in climate adaptation, WWF plans to support networks of marine sanctuaries and locally-managed conservation areas across the Coral Triangle.

Better fisheries management is also key to alleviating the impacts of coral bleaching, ensuring that only viable sites are given access to fishing and that the more sensitive ones are given time to recuperate via strong regulations, enforcement and awareness.

In Malaysia, for instance, WWF is promoting the conservation of herbivorous reef fish, which plays a critical role in keeping algae populations lower, allowing room for coral recruits to settle on the potentially newly-dead coral skeletons.

Only a year ago, WWF launched The Coral Triangle and Climate Change: Ecosystems, People and Societies at Risk, a report based on a thorough consideration of the climate biology, economics and social characteristics of the region, showing how unchecked climate change will ultimately undermine and destroy ecosystems and livelihoods in the Coral Triangle.

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