作　　者： ; ; (余克服）; (袁家义）;

机构地区： 中国科学院南海海洋研究所

出　　处： 《海洋通报》 1994年第5期44-56,共13页

摘　　要： 永兴岛和石岛同在一个礁盘上.永兴岛是全新世晚期形成的新灰沙岛.石岛原是晚更新世晚期形成的古沙山,今是一个全新世中期后被现代礁坪包围的岩石岛(老灰沙岛).本区属热带海洋季风气候,海中热带海洋生物繁多,岛上热带植物繁茂,鸟类也多,土壤为磷质石灰土.自然资源丰富,人们需要作出长期的开发规划,加强管理和自然环境保护. Both the Yongxing Island and the Shi Island are situated together on the same top of a coral reef in northeastern Xisha Islands. The Yongxing Island is a new lime-sand in constituent and was formed in the late Holocene. The Shi Island used to be a sand-hill in late Epipleistocene, but now it is a rocky islet (an old lime-sand islet) that has been surrounded by modern coral reefs since middle Holocene. After middle Tertiary, this region has always had tropical marine monsoon climate. In seas tropical marine organisms abound, while on land tropical plants are luxuriant, with many bird species. The soil of both islands is of phosphatic lime type. In long term development planning,efforts must be made on appropriate regulation and management in order to protect natural environment and optimum exploitation of the affluent natural resources on the two islands.

关 键 词： 西沙群岛 自然地理 自然资源 永兴岛 石岛

领　　域： [天文地球] [天文地球]