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WEDNESDAY February 5, 2014 |0 041 503 6111 | Email express@media24.com | peexpress.mobi | www.peexpress.co.za
NMMU EXPERT:
Red tide worst ever in province
EDITOR: BETTIE GILIOMEE
Tell us your love story and win!
LIZEKA TANDWA
bloom dies and the decomposition uses up the oxygen in the water, killing fish, which is LOCAL Marine Biologist said happening in PE,” she added. She said there was no way of knowing how the red tide, which is currently stretching along the Eastern long this tide would be in the EC coastal waCape Coast from Port Alfred to ters. “We just have to wait for the bloom to Tsikitsikamma, is the worst red run its course naturally. It is a natural event tide in the Eastern Cape and the first to have that could pass with minimal impact or cause a large scale bloom of a rare species called major fish kills when it dies off.” Strydom said the worst that could happen Lingulodinium polyhedral. is that major fish kills could follow when the Residents have been advised to stay clear red tide organisms start dying off and decomof seafood and even swimming in the water, posing. This would have huge implications for the metro as they would have to clean till the tide clears. Senior Lecturer and Marine Biologist at beaches of decomposing fish posing a health NMMU Zoology Department, Dr Nadine Stry- hazard with bacteria and flies. Fish have aldom, warned that it was not advisable to ready started washing out at local beaches. Strydom explained that there was nothing swim in the red bloom as water may be swalthat people could do other than watch the lowed. “There are always many species of dino- show at night. “Both Noctiluca and Linflagellate present at any one time in the bloom. It is a natural event gulodinium fluoresce at night when agitated. This When a red tide bloom is that could pass is clearly seen in breaking around; often there are waves along PE shores at more bacteria in the wawith minimal the moment.” ter too as a result of deimpact or cause “There has been speculacomposition and this can tion that this tide came make people sick. It is major fish kills from passing ships releassafest to just avoid all when it dies off ing ballast water collected seafood during red tides, off the Cape and others including fish.” DR NADINE STRYDOM, speculate that the Seismic Strydom said the tide MARINE BIOLOGIST testing could have caused travels as far as ocean the red tide. These are yet currents and winds blow the water and the perfect conditions remain unfounded speculations. The Lingulodinium for the cells to keep dividing and blooming. species does occur in our waters but in very “These organisms need sunlight, nutrients low numbers. “It just so happens that we had upwelling and warm water to flourish. The rare species found in the current red tide, Lingulodinium of cold water during easterly winds and this polyhedral, is only mildly toxic but kills fish water brought up cysts of this species along and other marine life when the bloom dies off with other species of dinoflagellate into the and takes away the oxygen out of the water surface of the ocean where conditions were – the ensuing anoxic conditions is called a just right for a bloom of Lingulodinium. “It is an unusual event but nevertheless ‘black tide’. “Sometimes the non-toxic ones cause death anomalies occur in nature. Our climate is in marine life because the bloom is so concen- changing and we are going to see unusual trated that it can clog fish gills or when the events like this occurring more often,” she bloom runs out of nutrients to survive, the said.
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The Boardwalk, who will play host to couples on Valentine’s Day with a night filled with great food, live entertainment and decadent treats, are one of the prize sponsors in the PE Express readers’ competition for Valentine’s Day in which fantastic prizes are up for grabs. To enter, simply share your love story on our website (more info on page 6). The Board walk will also have specials on offer and lots of prizes up for grabs this Valentine’s Day. Looking forward to spending the day at the Boardwalk are Bulelani Bandi and local musician Cayce Fielding. PHOTO:LIZEKA TANDWA
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