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仙掌藻(Halimede)生长在暖水中,在南海珊瑚礁区水深7米以内均可见到。其碎屑是珊瑚礁、礁岩及礁区松散堆积物中的常见组分,因而具有造礁意义。在水动力作用下,它的钙化小节片易于破碎,并进一步粉碎成砂、粉砂或泥。它在一些地区被认为是碳酸盐砂或泥的主要提供者(Cloud,1962;Folk,1969),并沉积于一定的环境中,如礁后泻湖或礁体波影区。由于它们所具有的生物学和地质学意义,已成为海洋生物学和地质工作者所共同注意和研究的对象。
Halimede grows in warm water and can be seen within a depth of 7 meters in the coral reef area of the South China Sea. Its debris is a common component of coral reefs, reefs and loose deposits of reefs, which has the significance of reef building. Under hydrodynamic conditions, its calcified glabra are easily broken and further crushed into sand, silt or mud. It is considered as a major provider of carbonate sand or mud in some areas (Cloud, 1962; Folk, 1969) and is deposited in environments such as reef lagoons or reef waves. Due to their biological and geological significance, they have become the objects of common interest and research by marine biology and geology workers.