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High temperatures causing thermal stress on coral reefs islandwide

High temperatures causing thermal stress on coral reefs islandwide

2022-07-18

It was a sizzling hot day islandwide on Monday, with the highest temperature recorded at 38.4 degrees in Hualien’s Fuyuan Township. In Taipei, temperatures have soared to 38 degrees for three days in a row now. And it’s not looking like the heat is going to go anytime soon, with high temps expected until the weekend. The constant heat and absence of typhoons is causing coral reefs around the island to suffer from thermal stress. Experts say if things don’t change, coral bleaching could start occurring by mid-August.

Kuo Chao-yang
Academia Sinica Biodiversity Research Center
Typhoons can help bring down the temperature in coral reefs. Lowering the water temperature can alleviate thermal stress for the coral. Without typhoons, that means the coral is being cooked in water that’s hotter than what it can tolerate. The bleaching would start from the south, Kenting, Liuqiu Island, Green Island and Orchid Island. then it could spread to the northeast coast. It’s a higher latitude, so the heat builds up more slowly there.

The expert says bleached coral reefs take seven to 10 years to recover. If the hot weather persists and the bleaching takes foot, recovery could take even longer.

熱!北市連3天飆38度 海中珊瑚也被燙傷

2022-07-18

全台熱烘烘,今天各地依舊高溫炎熱,最高溫出現在花蓮富源38.4度,而台北市已經連續3天飆到38度,這樣炎熱的天氣將持續到週末,然而高溫不斷加上沒有颱風,台灣週邊海域的珊瑚也被燙傷,專家預估8月中珊瑚將開始白化。

[[中研院生物多樣性中心博士 郭兆揚]]
“颱風的話可以幫助珊瑚降溫,幫海水降溫,然後降低珊瑚的熱壓力,那所以既然一直都沒有颱風,那表示說珊瑚其實一直被超過牠耐受溫度的熱水來煮,基本上(白化)應該都是在南邊先開始,墾丁、小琉球或是綠島、蘭嶼,然後東北角的話,因為他緯度比較高,所以它的熱的累積比較慢”

專家推估,白化的珊瑚礁要7到10年才恢復,天氣再持續熱下去,恢復時間恐怕會拖更長。

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