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

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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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Who is Paulo Bento, the Portuguese coach from South Korea who coached Cruzeiro?

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The coach commanded the Portuguese national team at the 2014 World Cup in Brazil and left the South Korean national team after being eliminated in Qatar.

Portuguese coach Paulo Bento qualified South Korea for the playoffs of the World Cup, something the team had not achieved since 2010, when the South Korean team reached the 1/8 finals of this championship. But 4-1 rout against Brazil as a result, shortened the path of the Asian team, as well as put an end to the work of Paulo Sousa in the national team.

Paulo Bento started his career as a coach with the youth team of Sporting Clube Portugal in 2004. At the club, he commanded the youth team for two seasons, winning the junior national tournament in his first year. Incidentally, the coach took over the first team shortly after he announced his retirement as a player.

Given his prominence in the youth categories, Paulo was chosen to replace José Peseiro, who was eliminated in European competition, in the professional team of Sporting CP for the 2005 season./2006.

Professionally, Bento was runner-up for four seasons in a row in the Portuguese Championship. Despite this, the coach won two Portuguese Cups and two Candido de Oliveira Super Cups. On November 6, 2009, the coach resigned.

Having distinguished himself at Sporting, Paulo Bento was announced as Portugal’s coach on 21 September 2010 after the World Cup in South Africa, where the then-champion Spain was selected in the round of 16.

Gettyimages

In qualifying, the coach managed to show good results in the first games, plus, of course, take Portugal to the semi-finals of Euro 2012, taking off from Spain on penalties. Having stood out in competitions, the coach extended the contract until Euro 2016.

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However, after losing to Albania in qualifying for Euro 2016, the coach could not resist and was fired in September 2014. The unsuccessful campaign at the World Cup of the same year in Brazil also affected.

After the Portugal national team, Paulo Bento returned to Brazil in May 2016, but this time to coach the Cruzeiro club. With a contract until December 2017, the coach made his debut in the second round of the Brasileirão the same year.

Paulo Bento Cruzeiro Brazilian Championship in Sao Paulo 05062016Washington Alves/Light Press/Cruzeiro

However, Bento only lasted 17 matches in power with six wins, three draws and eight losses, leaving the team in second-to-last place in the tournament.

On 11 August 2016, the coach was announced as the new commander of Olympiacos, Greece, where he remained until 6 March 2017, winning the Greek title. Following this, Paulo Bento was announced as Chongqing Dangdai of China leading the team for only 15 matches.

20221124 Paulo BentoGetty Images

On August 16, 2018, Paulo Bento was announced as the new coach of South Korea following the departure of Shin Tae-yong, who lost in the group stage of the 2018 World Cup.

As part of the South Korean national team, the coach has 55 wins, 12 draws and eight losses, having won the East Asian Cup title and classified the team at the 2022 World Cup in Qatar. After being knocked out against Brazil in the 1/8 finals, the Portuguese announced his retirement from the national team.

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Pioli ‘pulls’ Leao by the ears and says the Portuguese ‘must make a dash’

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Pioli 'pulls' Leao by the ears and says the Portuguese 'must make a dash'

FROMTefano Pioli, Milan coach, gave an interview on the Italian radio program Sky Calcio Club on Sunday in which he talked about Rafael Leao’s participation in the 2022 Mundial, a test in which the Portuguese striker was a replacement for Fernando Santos. ‘, indicating that he has been talking to his player over the past few days.

“If we talk? They have an obligation to call me at the end of the game. He is happy because Portugal is doing well. It is clear that he would like to play more. I can take advantage of this for a contract extension,” said Pioli, who also spoke about the Portuguese’s renewal process.

“He is fine with us and management and Rafael are talking. We are waiting for good news,” the Transalpine coach fired.

Looking at his player’s short playing time at this 2022 World Cup, Pioli admitted that Rafael Leau would like to have more playing time for the national team, but hinted that the Portuguese striker is not unhappy.

“If he plays a little? It’s hard to judge because Portugal has a very high quality team. Rafael is happy because Portugal is having a good World Cup, but there is a lot of quality and competitiveness in the attacking sector of the Portuguese team. “, – stressed the coach of the Italian, who also left a small warning to Rafael Leau.

“When you see him in training, you immediately understand that he has incredible potential. He has technique and speed that few others have. Over the course of a period, he had to develop and adapt to the reality at Milan, where the pressure is different from what he is. he was in Lille. It took time, but his potential to become a great player was always there. But he still needs to make the leap to become a champion because he can be even more decisive in the opponent’s zone,” he stressed.

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“If you think about Rafael from two years ago, he has made tremendous progress. He’s missing a few things, but he’s smart and approachable. I can give him all the ideas he wants, but his talent must be left free. should improve his heading, given his physique,” he concluded.

Read also: Spaniards say Carlo Ancelotti is “in love” with Rafael Leao

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Portugal, nuts and the Portuguese consumer: a successful trilogy

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Portugal, nuts and the Portuguese consumer: a successful trilogy

Nuts have become part of a limited group of Portuguese agri-food sectors that manage to achieve much-desired food self-sufficiency. In the case of almonds it is 170% and in the case of chestnuts it is 116% in relation to the national consumption.

The value of Portuguese agricultural production in 2021 was 9.6 billion euros, representing a growth rate of 14.6% compared to 2020, and therefore it is fair to say that dried fruits today, with a production of 80,000 tons and exports reaching 100 million euros contributed. to this success.

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