Seagrass mapping in Greek territorial waters using Landsat-8 satellite images
Seagrass mapping in Greek territorial waters using Landsat-8 satellite images
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使用 Landsat-8 卫星图像绘制希腊领海海草图
DOI：
10.1016/j.jag.2017.12.013
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
S. Katsanevakis
中科院分区：
文献类型：
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作者：
K. Topouzelis;Despina Makri;Nikolaos Stoupas;A. Papakonstantinou;S. Katsanevakis
海草草甸是地球上最有价值的海岸生态系统之一，因为它们在海岸环境中的结构和功能作用。这项研究表明，遥感有能力制作区域范围的海草分布图。这里提供的海草覆盖率地图首次描述和量化了希腊沃茨海草草甸的范围和空间分布。需要这一信息来确定优先养护地点，帮助沿海生态系统管理人员和利益攸关方制定养护战略，并设计一个有复原力的海洋保护区网络。这些结果是根据对50幅Landsat-8卫星图像进行的基于物体的图像分析得出的。图像采集的时间窗为2013年6月至2015年7月。希腊沃茨的海草覆盖面积估计为2 619平方公里。最大的覆盖面积的个别海草草甸周围利姆诺斯岛（124平方公里），科孚岛（46平方公里），和东伯罗奔尼撒半岛（47平方公里）。对探测区域的准确性评估是根据62个Natura 2000站点进行的，这些站点有生境图。所有62个研究中心的平均总准确度估计为76.3%。
Seagrass meadows are among the most valuable coastal ecosystems on earth due to their structural and functional roles in the coastal environment. This study demonstrates remote sensing’s capacity to produce seagrass distribution maps on a regional scale. The seagrass coverage maps provided here describe and quantify for the first time the extent and the spatial distribution of seagrass meadows in Greek waters. This information is needed for identifying priority conservation sites and to help coastal ecosystem managers and stakeholders to develop conservation strategies and design a resilient network of protected marine areas. The results were based on an object-based image analysis of 50 Landsat-8 satellite images. The time window of image acquisition was between June 2013 and July 2015. In total, the seagrass coverage in Greek waters was estimated at 2619 km2. The largest coverages of individual seagrass meadows were found around Lemnos Island (124 km2), Corfu Island (46 km2), and East Peloponnese (47 km2). The accuracy assessment of the detected areas was based on 62 Natura 2000 sites, for which habitat maps were available. The mean total accuracy for all 62 sites was estimated at 76.3%.