Honorable Mention
2023 Skyscraper Competition
Liu Shijia, Liu Jieyao, Dou Han
China
Ocean acidification is the loss of pH value caused by the absorption of excessive carbon dioxide from the air. The change of atmospheric carbon is mainly caused by natural factors, which lead to natural fluctuations of global climate. Affected by the wind, the atmosphere first melted to the ocean surface hundreds of feet deep, and in the next few centuries, it gradually spread to all corners of the sea floor. Therefore, human activities are intensifying ocean acidification. Ocean acidification threatens biological and ecosystem services, which in turn threatens food security, tourism, coastal protection and people’s livelihoods.
When coral is under the pressure of environmental change, coral bleaching will occur. These corals expel symbiotic algae from their tissues, so that their tissues become transparent, exposing the white limestone skeleton below. Other effects of coral bleaching include thinning of coral tissue, reduction of mucus, and inhibition of sexual reproduction. The increase of ocean acidity and pollution are the main factors leading to bleaching phenomenon. Due to the effects of ocean acidification caused by climate change, global warming and the increase of carbon dioxide content in the atmosphere, coral bleaching in the Earth’s oceans is becoming more frequent and serious. By 2050, more than 30% to 50% of the global coral species may be extinct. Read the rest of this entry »