广西田林龙江垌上石炭统黄龙组珊瑚礁古生态

广西田林县龙江垌见晚石炭世的珊瑚格架礁，分三层旋回式生长于海百合碎屑滩上。造礁生物为丛状群体珊瑚Diphyphyllum sp.，附礁生物主要是海百合、腕足动物、藻类和有孔虫。造礁生物种群间仅是共同栖息生存，缺乏长期、稳定、复杂的生态关系，礁体生物群落成熟度低，除Diphyphyllum sp.搭建格架外，缺少其他造礁方式，在当时多变的水动力条件下，只形成了未成熟的层礁。对于龙江垌珊瑚礁生态特征形成原因归纳为以下几点:石炭纪中期全球地质构造变化影响、微生物群团和藻类造礁作用不明显、海百合的强大竞争作用使底栖生物群落受到抑制、Diphyphyllum sp.生态特点使其造礁能力差。

Longjiangdong Coral Reef Palaeoecology of the Upper Carboniferous Huanglong Formation in Tianlin County, Guangxi Province

 A Late Carboniferous coral frame reef developes in Longjiangdong village, Tianlin County, Guangxi Province. The reef basing on the crinoid fragments beach has three separate cycles. The reef builder is the fasciculate Diphyphyllum sp. and the reef adherers mainly are crinoids, brachiopods, some kinds of algaes and foraminifers. Reef building communities which just commonly grow together are lack of long term, stable, complex ecological relationships. The maturity of reef biomes is poor and other reef building ways are absence except Diphyphyllum sp. building the frame. It is formatted only immature stratigraphic reef under polytropic hydrodynamic conditions. The reasons why the Longjiangdong coral reef express such a distinctive characteristic are summarized as the following: the impacts of global geological structure changes in the Middle Carboniferous, the effects of microfloras and algaes in reef building are not obvious, the benthic community is suppressed by crinoids, the reef building capacity of Diphyphyllum sp. is poor for its ecological characteristics.