【作者】 禚鹏基；

【导师】 赵卫红；

【作者基本信息】 中国科学院研究生院（海洋研究所） ， 海洋生态学， 2008， 硕士

【摘要】 本论文通过2007年科学院创新项目KC2007-3航次现场调查和实验室微藻培养实验,研究了多胺对几种赤潮藻生长的影响,不同赤潮水体对几种赤潮藻生长的影响,硅藻赤潮消亡后海水几种溶解有机物的空间分布和时间变化及其与赤潮演替的关系,对实验室和现场观察到的现象进行了深入分析,得到了以下结论:较低浓度的多胺对东海原甲藻和塔玛亚历山大藻等甲藻的促进作用要高于对中肋骨条藻的促进作用。多胺可能在硅藻赤潮向甲藻赤潮的演替中起了一定推进作用。东海赤潮演替过程中典型的赤潮水体滤液对培养藻种生长的抑制或促进作用与现场演替过程相契合,化感物质是硅藻赤潮演替的影响因素之一。东海硅藻赤潮消亡后的海水有较强的类蛋白荧光,主要荧光峰是类酪氨酸B峰。在赤潮消亡主要海区FIB/FIs较大,这表明类蛋白溶解有机物主要是由赤潮藻破碎分解产生的类酪氨酸。S峰、A峰和C峰三者之间互相呈较好的正相关,且3者的荧光强度与盐度都呈显著的线性负相关,其分布均呈现出近岸高远岸低的特点,这表明江浙沿岸水的输入是其共同的重要来源。单糖、多糖、总糖和DOC与真光层生物活动密切相关。局部高值是之前赤潮高发的藻类产生的。B峰强度与叶绿素a之间存在一定的负相关,类酪氨酸可能在pico-flagellates暴发过程中作为营养源或生长刺激物。更多还原

【Abstract】 Based on the survey of KC2007-3 and algae cultivation experiment, the effects of allelopathy on the succession of the Red-tide in the East China Sea in 2007 were studied. Effects of exogenous polyamines and red-tide seawater filtration on growth of Prorocentrum donghaiense, Alexandrium tamarense and Skeletonema costatum were studied, and the distributing and variation characteristics of dissolved organic during the Red Tide were also discussed.Putrescine, spermine and spermidine were added to cultivation of P. donghaiense, A. tamarense and S. costatum respectively. Low concentration polyamines promoted P. donghaiense, A. tamarense more than S. costatum, which indicated that polyamines might advance the succession from diatom bloom to dinoflagellate bloom.The effect of cultivation with the seawater filtration in different phases of the red-tide was consistent with the process of succession of the red-tide in the East China Sea, which suggested allelochemical in seawater might play a part role in the succession of the red-tide.High tyrosine-like intensity was observed in diatom red tide dispersion area. High FIB/FIS showed that diatom bloom produced much tyrosine-like matter during dispersion. Peak S, peak A and peak C had positive correlation with one another, and their distributions were similar, which decreased with distance increasing away from the shore. Good negative correlations between peak S, peak A and peak C with salinity, which suggested that Jiangsu-Zhejiang Coastal Water was the same source of them.MCHO, PCHO, TCHO and DOC seemed to have something to do with phytoplankton in the euphotic zone, but did not have remarkable correlation with Chla. High concentration carbohydrate and DOC might derive from the secretion or decomposition of the diatom bloom.The intensity of protein-like fluorescence matter had reverse trend to the density of pico-flagellates, which suggested that those matter might act as nutrient resource or stimulative to pico-flagallates.更多还原