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Scientists solve the mystery of why some corals change color when pressed



Scientists solve the mystery of why some corals change color when pressed

Coral bleaching can damage the coral reef system. That happens when the ocean water gets too warm, encouraging corals to lose algae which gives them a lot of color. Humans are largely to blame for this, because warming of ocean temperatures is directly linked to global warming and the impact of humanity on climate, but I digress.

When scientists have studied coral bleaching for years, tracking how much damage has been done to large and small reef systems and monitoring their recovery, they have seen something strange. Sometimes the bleaching reef system does not turn white as usual. Sometimes it looks like it’s covered in a variety of neon highlighter colors. But why?

As written by researchers Jörg Wiedenmann and Cecilia D’Angelo in conversation, it seems that some corals have very colorful ways to protect themselves to speed up their recovery once the sea water returns to normal temperatures.

Their research began by trying to determine why only a few coral reefs became colored during the bleaching episode while others turned pale. Trials are conducted to see whether they can mimic phenomena in controlled settings but initially appear empty-handed. Not until scientists consider what happened in the stressed reef they found the answer.

“In healthy corals, most of the sun’s rays are absorbed by the photosynthetic pigment of algae,” the researchers explain. “When corals lose algae due to stress, excess light moves back and forth within the coral tissue, reflected by a white skeleton. Algae in the reef can recover after bleaching, after conditions return to normal. But when the coral interior lights up like this, it can be very stressful for algae, potentially delaying or even preventing them from returning. “

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That’s bad news, because permanent bleaching leads to coral degradation and can destroy corals that protect continental coastlines around the world. It is estimated that the cost of damage to coastal areas if we allow coral reefs to die will be greater than the money we have to pay for ensure their survival. They are important.

However, if corals only experience mild bleaching, some species change color in an effort to encourage algae to return sooner than later. There seems to be some kind of natural defense mechanism for rising sea temperatures or poor water conditions, and we see it more often now than before.

“If coral cells can still perform at least some of their normal functions during bleaching, an increase in internal light levels increases the production of colorful pigments that protect corals from light damage, forming a kind of sunscreen that allows algae to return,” explained the researchers. When the recovered algae begins to absorb light for photosynthesis again, the level of light in the reef drops, so the coral stops producing as much of this colorful pigment as possible. “

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Portuguese historical films will premiere on 29 December.



Portuguese historical films will premiere on 29 December.

Method Media Bermuda will present the documentary FABRIC: Portuguese History in Bermuda on Thursday, December 29 at the Underwater Research Institute of Bermuda.

A spokesperson said: “Method Media is proud to bring Bermuda Fabric: Portugal History to Bermuda for its 5th and 6th showing at the Bermuda Underwater Observatory. In November and December 2019, Cloth: A Portuguese Story in Bermuda had four sold-out screenings. Now that Bermuda has reopened after the pandemic, it’s time to bring the film back for at least two screenings.

“There are tickets For $ 20 – sessions at 15:30 and 18:00. Both screenings will be followed by a short Q&A session.

Director and producer Milton Raboso says, “FABRIC is a definitive account of the Portuguese community in Bermuda and its 151 years of history, but it also places Bermuda, Acors and Portugal in the world history and the events that have fueled those 151 years.

“It took more than 10 years to implement FABRIC. The film was supported by the Minister of Culture, the Government of the Azores and private donors.

Bermuda Media Method [MMB] Created in 2011 by producer Milton Raposo. MMB has created content for a wide range of clients: Bermuda’s new hospital renovation, reinsurance, travel campaigns, international sports and more. MMB pays special attention to artistic, cultural and historical content.

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Maestro de Braga is the first Portuguese in the National Symphony Orchestra of Cuba.



Maestro de Braga is the first Portuguese in the National Symphony Orchestra of Cuba.

Maestro Filipe Cunha, Artistic Director of the Philharmonic Orchestra of Braga, has been invited to conduct the Cuban National Symphony Orchestra, as announced today.

According to a statement sent by O MINHO, “he will be the first Portuguese conductor to conduct this orchestra in its entire history.”

In addition to this orchestra, the maestro will also work with the Lyceo Mozarteum de la Habana Symphony Orchestra.

The concerts will take place on 4 and 12 March 2023 at the National Theater of Cuba in Havana.

In the words of the maestro, quoted in the statement, “these will be very beautiful concerts with difficult but very complex pieces” and therefore he feels “very motivated”.

From the very beginning, Rachmaninoff’s Piano Concerto No. 2 will be performed by an Italian pianist (Luigi Borzillo), whom the maestro wants to bring to Portugal later this year. In the same concert, Mendelshon’s First Symphony will be performed.

Then, at the second concert, in the company of the Mexican clarinetist Angel Zedillo, he will perform the Louis Sfora Concerto No. 2. In this concert, the maestro also conducts Tchaikovsky’s Fifth Symphony.

“This is an international recognition of my work. An invitation that I accept with humility and great responsibility. I was surprised to learn that I would be the first Portuguese member of the Cuban National Symphony Orchestra. This is a very great honor,” the maestro said in a statement.

“I take with me the name of the city of Braga and Portugal with all the responsibility that goes with it, and I hope to do a good job there, leaving a good image and putting on great concerts. These will be very special concerts because, in addition to performing pieces that I love, especially Rachmaninov and Tchaikovsky, I will be directing two wonderful soloists who are also my friends. It will be very beautiful,” concludes Filipe Cunha.

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