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Detection of coral distribution change in recent decades with satellite remote sensing

机译：使用卫星遥感检测近几十年来的珊瑚分布变化

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摘要

Coral reef is a very important ecosystem in Sanya Bay and it has been studied for years only with in situ observations. However, these in situ observations generally have point information and lack the spatial resolution. Recently in order to make clear coral reef spatial distribution and variation in Sanya Bay, Hainan, satellite data of Landsat, QuickBird, CBERS (China-Brazil Earth Resources Satellite program) and historical in situ observation data are used to retrieve and validate the information of coral reef. Based on the retrieved information, coral reef coverage and variation were studied in the paper. Satellite remote sensing results showed that area of coral reef distribution along coast of Dongmao (east) Islands and Ximao (west) islands in Sanya Bay reduced greatly in recent years, which coincides with variation trends of in situ observation data in the whole Sanya Bay. While analyzing the reason for coral reduction it was found that coral distribution in Sanya Bay conversely correlated with anthropic activities, such as digging coral reef for making lime and land use change. These activities change the water quality and sediment type which lead to the change in coral distribution.
机译：珊瑚礁是三亚湾一个非常重要的生态系统，仅通过实地观测已经研究了多年。然而，这些原位观测通常具有点信息并且缺乏空间分辨率。最近，为了弄清楚海南三亚湾的珊瑚礁空间分布和变化，利用Landsat，QuickBird，CBERS（中国-巴西地球资源卫星计划）的卫星数据以及历史实地观测数据来检索并验证了该卫星的信息。珊瑚礁。基于检索到的信息，本文研究了珊瑚礁的覆盖范围和变化。卫星遥感结果表明，近年来三亚湾东毛岛（东）群岛沿岸和西毛岛（西）沿岸珊瑚礁分布面积大大减少，这与整个三亚湾的实地观测数据变化趋势相吻合。在分析减少珊瑚的原因时，发现三亚湾的珊瑚分布与人类活动相反，例如挖珊瑚礁以制造石灰和改变土地用途。这些活动改变了水质和沉积物类型，从而导致了珊瑚分布的变化。

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