But in the past three decades,they have been under the threat around the world mainly from increased storms ,a growing number of arown-of-thorns starfish and coral bleaching.
【但在过去的三十年里,他们一直遭受来自世界各地的威胁,主要是不断增多的风暴,以及越来越多的带刺海星和珊瑚白化.】哦，a growing number of arown-of-thorns starfish and coral bleaching.也是from 的宾语呀？！我以为它是谁的同位语。谢谢！三者并列