CPH Post

Sci/Tech

The blue-green algae threat to Danish beaches

Take a deep dive in the blue ocean before it turns green


Blue-green algae looks set to infest beaches all over Zealand (Photo: Andreas Jakobsen)

July 11, 2014
12:36

by Andreas Jakobsen


Algae is one of Denmark's worst summer paradoxes. As soon as the sea gets warm enough to swim in, there's a risk that the crystal clear water will turn into a thick, greenish soup.

Poisonous cyanobacteria, commonly known as blue-green algae, is about to bloom in the northern Baltic Sea and may spoil the fun at the beaches of Bornholm and Zealand if the summer weather stays hot, Videnskab reports.

Øjvind Moestrup, a biology professor at the University of Copenhagen, said the hot weather and sunlight will make the blue-green algae grow and multiply. 

"Right now there is a large blossoming of blue-green algae near the Gulf of Finland down along the south coast to Poland. If it keeps developing like this, there's a major risk that we will get problems in Denmark," he told Videnskab.

Dogs get killed
Bathers are advised to stay out of the water when the blue-green algae hits the shores. While humans often react to blue-green algae by getting ill, there have been several cases in which dogs have died after drinking algae-infested waters.

However, it's still to early to predict how bad it is going to be.

"It depends on the wind, when the algae will reach Denmark. If the wind blows from the east, it will be here in a short time, but if it blows from the west, we may even avoid it," Moestrup said.



Related stories



Latest Comments

What about the French?

(William Harvey on December 19, 2014 13:00)

I should tell my cow sister-in-law who hasn`t worked in 26 years.

(Jon Paris King on December 19, 2014 12:43)

Super ! Now I can get a red passport to compliment my blue one.

(Tom Therkelsen on December 19, 2014 05:40)

Vivo en Argentina y nunca pude lograr la doble ciudadanía ya que mi padre...

(Patricia Thomassen on December 18, 2014 19:38)

Danish team deserved this cruel lesson, because the Danish handball community...

(Szalay Gergely on December 18, 2014 15:49)

Do these municipalities understand the geopolitical situation of western...

(Jaou Ad on December 18, 2014 13:54)

For god sake, not again. Academic career is a very risky path with no real...

(Andrei Shchebet on December 18, 2014 13:26)

"In the north-Canadian hamlet of Arviat, an organised polar bear patrol,...

(Aleksander Pruitt on December 18, 2014 10:11)

Customers from all most all parts of USA and Canada purchase from us without...

(Jhon Donald on December 18, 2014 10:10)

Moose can be dangerous. https://www.youtube.com/watch?v=p9LTjhGvxxg "A class...

(William Harvey on December 17, 2014 18:27)