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四川江油渔洞子剖面上二叠统长兴组顶部出现的群体珊瑚Waagenophyllum sp.是我国所发现的最晚的古生代群体四射珊瑚之一,下三叠统飞仙关组底部微生物岩直接覆盖在它上面,二叠系-三叠系界线成为这两种不同的生物沉积的分界线,它们各自具有一个独特而复杂的生态系统,二者之间为突变关系。在珊瑚层生态系统中的群体四射珊瑚及重要成员真核藻类如裸海松藻、假蠕孔藻等在微生物岩生态系统中完全消失,后者以底栖微生物群落为主,共生生物组合面貌与珊瑚层中的生物组合面貌截然不同,微生物岩生态系的生物个体小型化也是主要变化之一。
The coral Waagenophyllum sp. On the top of the Changxing Formation in the Permian Changxing Formation in Jiangyou, Sichuan Province is one of the latest Paleozoic coral corals found in China. The bottom of the Lower Triassic Feixianguan Formation is covered directly by microbial strata In the above, the Permian-Triassic boundary became the dividing line between these two different biological sediments. Each of them had a unique and complex ecosystem, and the relationship between them was abrupt. The coral layer coral ecosystem and its important members of the coral layer of eukaryotic algae such as naked seaweed, pseudomycoides algae in the microbial rock ecosystem completely disappeared, the latter mainly benthic microbial community, symbiotic biological combination of the face In contrast to the biological assemblages in the coral layer, miniaturization of individual organisms in microbial rock ecosystems is also one of the major changes.