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中国南方晚二叠世生物礁分布广泛，但绝大多数属于海绵礁．湖南慈利晚二叠世除发育有海绵礁外，还有至今为止发现的世界上发育最好的古代珊瑚礁，而且海绵礁与珊瑚礁在同一条带上连续分布；因此是研究海绵礁与珊瑚礁古生态关系十分理想的场所．通过对慈利晚二叠世海绵礁及珊瑚礁内部造礁生物群落、沉积相特征、礁体演化序列及成岩作用特征等的分析和对比来研究它们之间的生态关系，发现其中的海绵礁为台地边缘礁，而珊瑚礁则应属于岸礁
Late Permian reefs are widespread in southern China, but the vast majority belong to sponge reefs. In addition to the development of sponge reefs in the late Permian of Cili, Hunan Province, there are still the best developed ancient coral reefs found in the world so far, and the sponge reefs and coral reefs are continuously distributed on the same belt; therefore, Ecological relations is a very ideal place. By analyzing and comparing the characteristics of reef-forming biota, sedimentary facies, reef evolution sequences and diagenesis in the spontaneous reefs and coral reefs of Cili in the late 21st century, the ecological relationships among them were studied, and the sponge reefs were found to be The edge of reefs, while coral reefs should belong to shore reefs