Low Tide Corals
极端的潮汐变化在所谓的春季潮流中每月发生。这个潮汐阶段在每个月球月份发生两倍，潮汐高度的大幅挥杆靠近新月。第二大潮相位发生在满月周围。
在最极端的日子里，一些浅珊瑚礁可以在最低的潮汐中暴露于空气中。在此期间，珊瑚很脆弱，但它们已经适应了这种环境，可以在海浪之上生存。
这些低潮事件暴露于曼卡岛, Sulawesi are any tide below 0m. These pictuwerehere taken one hour after low tide June 15th which was noted as -0.2m.
权衡？
Once the tide comes back in the corals are close to the surface and can soak up all the suns rays needed for photosynthesis. Because of the constant shift in tides, these areas are also subjected to waves, and constant flow as the water moves up and down over the reef.
这有助于确保过渡阶段的水温降低，从而冷却珊瑚的内部发动机，而不是将它们推入超速驱动器，在那里它们容易驱除其光合作用的共生体，从而导致珊瑚漂白。
在这些低潮的阶段，不仅珊瑚不得不担心的是狂暴的阳光，而且还有风，以及雨中的任何淡水。随着潮汐的降低，珊瑚开始产生粘液层以保护自己。息肉将在骨骼内部缩回，粘液覆盖珊瑚。
有风这可能干出粘液laye之类r, and if there is rain it could also wash away the mucus. This could lead to a greater stress on the corals and could result in them dying during these low tides.
对于那些珊瑚书呆子，我发现了interesting paper，关于珊瑚在潮汐下产生的粘液（二甲基磺胺丙酸）的作用，以及在暴露的空气周期内如何增强对氧化应激的珊瑚耐受性。
您可以看到该礁石上的一些巨大的珊瑚在不断暴露在潮汐下的情况下有死斑。较慢的巨大珊瑚无法跟上这种每月压力，而珊瑚的最高点已经死亡。
The faster growingAcroporasdon’t seem to mind whatsoever, and there are several big colonies where the upper half is exposed up to two hours during low tide. These faster-growing corals are able to regrow any branches which might get killed during a low tide even with increases stress of wind and rain.
柔软的皮革珊瑚只是放气和倒塌，而其他柔软的珊瑚也像Xeniaclose up their polyps leaving little grey mushrooms between different coral colonies. We even found a few small clams, tucked between rocks, however none that were completely exposed to the air.
珊瑚are resilient animals, which can adapt to this extreme environments. It’s only when the changes happen too quickly when they are exposed to these extremes for a very long period of time they become stressed and die.
If you are planning a trip to theMurex Hotel on Bangka Island，看看您是否会在新的或满月的围绕那里前往那里，如果是这样，请确保在低潮时散步到潮间带，进行珊瑚斑点冒险，而不会弄湿您的手！
