1.   Leading marine researchers say harmful algae blooms like the ones that cause red tide are on the increase in waters around the world, but nobody is certain why.

2.   A harmful algae bloom occurs when naturally occurring toxic, microscopic algae suddenly reproduce in a large, dense mass in the ocean, upsetting the natural balance.

3.   Eating seafood that has consumed harmful algae can cause one of five types of food poisoning, some of which are life threatening depending on the algae involved.

4.   She said laboratory tests have detected a harmful algae in the water, but that samples were being sent to experts in South Africa for further testing.

5.   The work was ordered because submerged, decaying trees could reduce oxygen levels in the reservoir and promote the growth of harmful algae.