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湛江港浮游植物与赤潮植物的初步研究 总被引:12,自引:1,他引:12
于1987年8月在湛江港设13个点采样。鉴定表明,共有浮游植物37属94种和变种;优势种类有中肋骨条藻、日本星杆藻、佛氏海毛藻等。湛江港浮游植物密度较高,港内外平均达1.3×104cell/L和7.3×105cell/L。经单项营养指数和营养状态结合指数分析表明,除两个点无机氮浓度略超标外,所有站位均未达到富营养化水平。调查期间,共发现赤潮生物31种,其中主要有中肋骨条藻、日本星杯藻、佛氏海毛藻、尖刺菱形藻和夜光藻等,中肋骨条漠和日本星杆藻曾形成水华。 相似文献
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大鹏湾几种赤潮甲藻的分类学研究 总被引:24,自引:3,他引:24
对采自深圳大鹏湾的5种赤潮甲藻进行了分类学研究。其中海洋原甲藻属pro-rocentrum2种:P.micans Ehrenberg,P.minimum(Pavillard)Schiller;亚历山大属Alexandrium2种:Atamarense(Lebour)Balech,A.catenella(Whedon&Kofoid)Ba-lech;施克里普藻属Scrippsiella1种:S.tro 相似文献
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Dinophysis caudata generated lipophilic shellfish toxins in bivalves from the Nanji Islands,East China Sea 总被引:1,自引:0,他引:1
A 12-month program of monitoring potentially toxic microalgae(that produce lipophilic shellfi sh toxins; LSTs) and their toxins in bivalves was conducted from April 2006 to March 2007 in the Nanji Islands, East China Sea. Two Dinophysis species, D. caudata and D. acuminata, were identifi ed, and D. caudat a was found to be the dominant species. D. caudata was detected in water samples between April and June 2006, and between February and March 2007. It reached its highest abundances in May, with a mean abundance of 1.38×10 2 cells/L in surface water and 1.25×10 2 cells/L in bottom water(10 m deep). The temporal distribution of D. caudata was associated with the occurrence of LSTs in bivalve samples, which mostly occurred at the same time as D. caudata blooms, between April and July 2006. All of the cultured bivalves sampled between April and June were contaminated with LSTs, with an average toxicity of 85 μg okadaic acid(OA) eq./100 g meat, which was four times higher than the Chinese regulatory limit(20 μg OA eq./100 g meat). Ten out of fi fteen wild samples(66.7%) collected during the same period were positive for LSTs, and contained an average LST toxicity of 45 μg OA eq./100 g meat(more than twice the regulatory value). Cultured Patinopecten yessoensis collected on 15 May 2006 had the highest toxicity, 320 μg OA eq./100 g meat, and relatively high toxicities(80 to 160 μg OA eq./100 g meat) were found in bivalves until the end of July. 相似文献
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甲藻(Dinophyta)凯伦藻科(Kareniaceae)的分类学研究与展望 总被引:2,自引:0,他引:2
凯伦藻科(Kareniaceae)是甲藻门中较新建立的一个科。凯伦藻科种类广泛分布于全球海域,目前已报道3属30个种。由于该科大部分种类频发藻华,严重威胁近海生态安全和水产养殖,因而备受关注。自20世纪90年代起,我国沿岸也逐渐成为凯伦藻藻华的重灾区,凯伦藻曾引发我国最严重的几次藻华事件。本文对本科种类分类学特征进行详细描述,翻译其中文名,编制属、种分类检索表,以期为我国凯伦藻生物多样性研究以及凯伦藻藻华防治提供基础而必要的种源信息。 相似文献
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紫外光对有毒甲藻塔玛亚历山大藻的生态学效应 总被引:21,自引:1,他引:21
对1991年分离自南海大鹏湾海域的塔玛亚历山大藻单克隆培养林在不同光照条件、辐射强度(9.5,5.9W/m2)(辐射剂量为:95,190,380,760,1520J/m2)和营养盐(N,P)浓度下,进行紫外辐射敏感性的研究。结果表明,紫外辐射可以导致细胞变形、增大和死亡。不论在什么条件下,低剂量的紫外辐射(95J/m2)就能使该藻的存活率和生长率大幅下降。此后,随着辐射剂量的增加,虽然存活率和生长率继续下降,但下降幅度渐缓。充足的营养盐和辐射处理后的连续光照对藻群的恢复有益,但在缺氮和缺磷条件下培养的藻群,可能由于生理活性减弱而导致对紫外辐射敏感性的迟钝。辐射强度对该藻的紫外辐射敏感性的影响十分显著,而且与辐射剂量具有明显的双重效应。 相似文献