鸟类和珊瑚鱼很好地证明了东部物种多样性的退化。
This easterly decline in species diversity is well demonstrated by birds and coral fish.
作者提到了各种海洋岛屿上鸟类和珊瑚鱼物种的预估数量，以显示已经积累了多少关于海洋物种的知识。
The author mentions the estimated numbers of birds and coral fish species on various Oceanic islands in order to demonstrate how much knowledge about Oceanic species has been accumulated.
依靠阳光生长的海藻和珊瑚聚集在沉船上。
Seaweeds and corals, which need light to grow, colonise them.
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