摘要: |
收集了1990~2019年长江口及其邻近海域(29°25′~32°25′N、124°00′E以西)记载的赤潮事件,基于gis软件对所有赤潮事件进行整理,分析了赤潮的时空分布规律,并绘制长江口及邻近海域赤潮分布图。结果表明:①近30年来,长江口及其邻近海域赤潮经历了先升高后下降的过程,赤潮次数共计144次,暴发面积>1000km2有28次。赤潮发生核心区集中在长江口外、花鸟山-嵊泗列岛、岱山岛-中街山列岛、舟山岛-朱家尖岛海域。②长江口及邻近海域赤潮多发期为5~8月,5、6、7、8月发生的赤潮次数分别占总数的28.37%、34.75%、17.78和9.29%。③东海原甲藻、中肋骨条藻是长江口及其临近海域最常见赤潮暴发种,发生次数分别为,55次和40次,占统计总次数的38.19%和27.78%,2000年以来,东海原甲藻赤潮发生频率呈上升态势。 |
关键词: 长江口及邻近海域 赤潮 时空分布 地理信息系统 |
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基金项目:国家重点研发计划项目(2016YFA0600904);国家重点研发计划项目(2017YFC040470002)。*责任作者:副研究员,zhaoym@craes.org.cn , 秦延文, 张雷, 乔飞, 马迎群 |
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Temporal and spatial distribution of red tide in Yangtze River estuary and adjacent waters |
Zhao Yanmin1, Qin Yanwen2,3, Zhanglei2,3, Qiao fei2,3, Ma yingqun2,3
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1.Chinese Research Academy of Environmental Sciences;2.State Environmental Protection Key Laboratory of Estuaries and Coastal Research,Water Environment Research Center,Chinese Research Academy of Environmental Sciences,Beijing,100012;3.China
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Abstract: |
The events of red tide were collected in Yangtze River Estuary and adjacent waters from 1989 to 1990. Geographics information system (GIS) was used to analyze the temporal and spatial distribution of the red tide. The results showed as follows: ①144 times of red tide was counted in total. The number of the red tides that the cover area was larger than 1000km2 was 28. The outside of Yangtze River estuary, Huaniaoshan-Shengsi archipelago and Zhoushan-Zhujiajian island was the red tide-prone areas. ② Most of the occurrence of the red tide was in May to August and the frequency of the red tide in May, June, July and August was 28.37%, 34.75%, 17.78 and 9.29% respectively. ③ Prorocentrum danghaiense, Skeletonema costatum were the dominant species of the red tide in Yangtze River estuary and adjacent sea. |
Key words: Yangtze River Estuary and adjacent sea red tide temporal and spatial distribution geographic information system |