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1972年8月至11月于东海北部(30°N—32°N,127°E以西)部分海域中所出现的赤潮是由蓝藻门中的三种毛丝藻组成,即(1)汉氏毛丝藻 Trichodesmium Hildebrandtii Gomont(2)薛氏毛丝藻 Trichodesmium Thiebautii Gomont(3)红毛丝藻 Trichodesmium erythraeum Ehr.。其中汉氏毛丝藻为优势种。这次赤潮主要形成于长江口以东外海,9月份后虽扩大分布区,但仍以东部海区最密集。11月后逐渐消失。此次赤潮最明显的危害表现在对饵料基础的破坏上,它能引起鲐、鲹鱼索饵渔场位置的改变和洄游路线的变化,从而促成减产。经分析,此次形成赤潮的原因主要是由于由该年夏季气旋而引起的涌升流和连续的强台风等因素的综合作用结果。以使上、下层搅拌剧烈,营养盐充分溶于水中增加了肥沃度。加上秋季水温偏高和高温水体的出现,也为热带性藻类繁殖提供了有利条件。本文作者建议,今后随着现代工业的发展,应加强对海洋污染和赤潮预报的研究。
The red tides that occur in some sea areas in the northern East China Sea (west of 30 ° N-32 ° N, 127 ° E) from August to November 1972 are composed of three species of filamentous filaments in the Cyanophyta: (1) Trichodesmium Hildebrandtii Gomont (2) Trichodesmium Thiebautii Gomont (3) Trichodesmium erythraeum Ehr. Han albacore was the dominant species. The red tide was mainly formed in the sea to the east of the mouth of the Yangtze River. Although it expanded its distribution area after September, it is still the densest in the eastern sea area. After November gradually disappear. The most obvious harm to the red tide is manifested in the destruction of the basis of the feed, which can cause changes in the location of migratory and migratory flocks, and lead to reduced production. The analysis shows that the reason for the formation of red tides is mainly due to the combined effect of the upwelling caused by the summer cyclone over the year and the continuous strong typhoon. In order to make the upper and lower agitation, salt fully dissolved in water increased fertility. Coupled with the autumn high water temperature and the emergence of hot water, but also for tropical reproduction of algae provides favorable conditions. The author suggests that with the development of modern industry in the future, research on marine pollution and red tide forecast should be strengthened.