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| Investigation and Analysis on Death of Marine Life in Local Area of Dalian Shallow Sea in Spring 2020 |
| WU Jinhao1,2, SONG Guangjun2, SONG Lun2, WANG Bai2, ZHANG Yimin1, YIN Minghao3, WANG Zhaohui2, ZHOU Zunchun2 |
1. Nanjing University of Information Science & Technology, Nanjing 210044, China;
2. Liaoning Ocean andFisheries Science Research Institute, Dalian 116023, China;
3. Department of Agriculture and Rural Affairs of Dalian,Dalian 116011, China |
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Abstract The field investigation and sample collection were carried out after the death of marine life in Dalian shallow sea area. Through the statistics and analysis of species identification, the causes of death of marine life were discussed from several aspects. The results showed that there were 52 species of marine organisms in 10 categories to be collected from 4 locations, showing mollusks (16 species)> arthropods (15 species)> annelids (7 species)> echinoderms (5 species)> chordates (4 species)> other phyla (1 species each). There were 38 dead species, among which the death amount of Protankyra bidentata, Upogebia major and Solen stritus was particularly obvious. According to the analysis, water pollution, disease and low oxygen level were unlikely to lead to the massive death of marine organisms. The extreme sea conditions under strong wind conditions had changed the habitat environment of marine organisms, making them unable to escape. The joint action of large-scale cooling and snowfall in a short time led to the occurrence of the disaster event. The findings can provide a technical reference for the government to carry out the prevention and treatment of similar sudden ecological environment disasters.
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Received: 06 March 2020
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