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How Coral Reefs Build Their Calcium Carbonate Skeletons
珊瑚礁如何构建其碳酸钙骨骼
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Coral polyps extract calcium and carbonate ions from seawater to build hard skeletons.珊瑚虫从海水中提取钙离子和碳酸根离子，构建坚硬的骨骼。
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This biomineralization process depends on stable pH, temperature, and sunlight levels.这种生物矿化过程依赖于稳定的pH值、温度和光照水平。
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Zooxanthellae algae living inside corals supply energy through photosynthesis.生活在珊瑚体内的虫黄藻通过光合作用为其提供能量。
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Without these symbiotic algae, corals cannot deposit calcium carbonate efficiently.没有这些共生藻类，珊瑚无法高效沉积碳酸钙。
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Ocean acidification lowers carbonate ion concentration, slowing skeleton growth.海洋酸化降低了碳酸根离子浓度，减缓骨骼生长。
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Each polyp secretes a cup-shaped limestone structure that stacks over centuries.每个珊瑚虫分泌一个杯状石灰石结构，历经数百年层层堆叠。
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New layers form daily, creating growth bands visible under microscopes.新层每日形成，在显微镜下可见清晰的生长纹带。
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Reef-building corals thrive only in warm, clear, shallow tropical waters.造礁珊瑚仅能在温暖、清澈、浅层的热带水域中繁盛。
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Storms and parrotfish grazing help shape reef architecture over time.风暴和鹦嘴鱼啃食随时间推移塑造了珊瑚礁结构。
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Understanding this process reveals why coral health signals broader ocean ecosystem stability.理解这一过程揭示了珊瑚健康为何是整个海洋生态系统稳定性的关键指标。