China`s biggest ever algal bloom turns Yellow sea green

Last Updated: Friday, July 5, 2013 - 10:13

Zee Media Bureau

Qingdao: China’s Yellow sea has been hit by the largest ever growth of alga with vast waves of green growth washing onto it`s shores. It is the largest ever recorded Algal bloom recorded in China.

Pictures coming from China showed beachgoers swimming and playing in the green tide in the eastern city of Qingdao, while bulldozers shovelled up tonnes of algae from the sand. Qingdao officials said they had removed around 7,335 tonnes of algae, the official Xinhua news agency reported.

The State Oceanic Administration said on its website that the algae, enteromorpha prolifera, started to appear a week ago and had spread across an area of 28,900 square kilometres.Earlier the same incident had occurred in 2008 which affected around 13,000 square kilometres.

This phenomenon is usually caused by an abundance of nutrients in the water, especially phosphorus, although the triggers for the enormous blooms which began to appear in the Yellow Sea in 2007 remain uncertain.

The China Daily quoted professor Bao Xianwen, of the Qingdao-based Ocean University of China, as saying: "It must have something to do with the change in the environment, but we are not scientifically sure about the reasons."

The algae are not toxic nor detrimental to water quality, but lead to extreme imbalances in marine ecosystems by consuming large quantities of oxygen and creating hydrogen sulphide.

First Published: Friday, July 5, 2013 - 10:08

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