| 摘要: |
| 自2007年以来,黄海海域每年的5月初-7月底浒苔会周期性的爆发与消亡,严重导致海洋生态环境的破坏以及经济的损失。该文利用2014年的HJ-1A/1B遥感影像,利用神经网络监督分类及RULE规则影像重分类动态阈值法,对浒苔的漂移路径、各时期影响的海域面积、分布面积以及爆发高峰期的最大面积进行了动态监测。结果表明：2014年浒苔持续时间为101天,5月中旬开始在江苏省盐城市近海出现零星斑点,分布面积为2.299km2,影响面积1744.799 km2； 6月初到6月中旬浒苔广泛分布于黄海海域,分布面积扩大至1367.145km2,达到2014年的峰值；从6月下旬开始,浒苔进入衰退期,浒苔分布面积、相对聚集密度均急剧缩小,但影响面积的峰值出现在该时期； 8月初消亡于青岛附近海岸,8月20日遥感影像已难以监测到浒苔的存在。2014年黄海海域浒苔经过了“出现—发展—爆发—衰退—消亡”五个发展阶段。 |
| 关键词: 黄海 浒苔 漂移路径 HJ-1A/1B |
| DOI： |
| 分类号:P76 |
| 基金项目:山东省自然基金（ZR2015DM015）；烟台市科技项目（2013ZH094）；国家自然基金（41471223） |
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| Spatial and temporal variability of Ulva. prolifera in the Yellow Sea of China in 2014 |
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XUE Rui,WU Mengquan,LIU Yang and SUN Xiao
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Institute of Geography and Planning,Ludong University,Shandong Yantai,Institute of Geography and Planning,Ludong University,Shandong Yantai,Institute of Geography and Planning,Ludong University,Shandong Yantai,Institute of Geography and Planning,Ludong University,Shandong Yantai
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| Abstract: |
| A recurrent floating green algae bloom was detected in the Yellow Sea since 2007. The Ulva. prolifera is non-toxic, but the massive accumulations can result in significant environmental damage and cause economic loss to marine industries. In this study, we investigate the spatial and temporal patterns of Ulva. prolifera green tides in the Yellow Sea during 2014 using HJ-1A/1B satellite images by means of Neural Network Supervised Classification (NNSC) and RULE Image classification threshold segmentation. Results show that a little Ulva. prolifera was discovered in adjacent sea of Yan Cheng, Jiang Su province in middle May with distribution area 2.299km2, influence area 1744.799 km2. The bloom reached a maximum, 1367.145km2, until middle June and were widely distributed in the Yellow Sea. Distribution area and relative aggregation density decreased rapidly since end-June, however, influential area reached a peak value. In early August Ulva. Prolifera died out around coastal of Qing Tao, and Ulva. Prolifera had not been monitored from remote images on August 20. It existed about 101 days. The Ulva. Prolifera bloom experienced successively five stages, i.e. appearance, development, outbreak, recession and demise. In another sense, Ulva. Prolifera in the Yellow Sea drifted subsequently from Yancheng coast of Jiangsu province to Qingdao coast of Shandong province, and reached Yantai the farthest coast. |
| Key words: Yellow Sea Ulva. prolifera floating path HJ-1A/1B |