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Dynamics of potentially harmful microalgae in a confined Mediterranean Gulf-Assessing the risk of bloom formation

机译：密闭地中海海湾中潜在有害微藻的动态-评估水华形成的风险

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摘要

The population dynamics of potentially harmful microalgae was investigated in the semi-enclosed shallow Gulf of Kalloni, Greece (Aegean Sea, Eastern Mediterranean), during a 2-year period from August 2004 to March 2006. A total of 21 potentially harmful microalgae (bloom-forming and/or toxic) were identified including 3 diatoms and 18 dinoflagellates. The densities of each species were analyzed in time and space and in relation to environmental parameters. Some species such as Alexandrium insuetum, Heterocapsa circularisquama, Karlodinium veneficum, Scrippsiella trochoidea, and Ceratium spp. developed high cell concentrations, particularly during a Pseudo-nitzschia calliantha winter bloom. Other species such as Dinophysis caudata, Ostreopsis ovata, Prorocentrum minimum, and Protoperidinium crassipes were rare or appeared in small numbers. Densities of the most abundant species were closely associated with freshwater nutrient-rich inputs during winter, being negatively correlated with temperature and salinity and positively correlated with nitrogen. The spatial distribution of the abundant species exhibited a marked increase towards the inner part of the gulf, close to the main freshwater inputs, whereas some species were mainly concentrated in the dilute surface layer (1 m depth). Examination of the abundance-occupancy relationship revealed that the species more prone to bloom are those with wide spatial distribution and frequent presence throughout the year such as the diatom P. calliantha. Although blooms of cyst-forming species are rarer, an increased risk can be foreseen under favorable resource supply and environmental conditions during winter.
机译：在2004年8月至2006年3月的2年中，对半封闭的希腊卡洛尼湾（东地中海爱琴海）浅海中潜在有害微藻的种群动态进行了调查。总共有21种潜在有害微藻（水华） （形成和/或有毒）被鉴定为包括3个硅藻和18个鞭毛藻。在时间，空间和环境参数方面分析了每个物种的密度。一些物种，如山毛榉，轮叶杂鳞鳞茎，香叶Karlodinium v​​eneficum，Scripsipsiella trochoidea和Ceratium spp。产生了高浓度的细胞，尤其是在假奈瑟菌calliantha冬季开花期间。其他物种，例如Dinophysis caudata，Ostreopsis ovata，Prorocentrum minimum和Protoperidinium crassipes很少见或数量很少。冬季，最丰富物种的密度与淡水富含营养的投入密切相关，与温度和盐度呈负相关，与氮呈正相关。丰富物种的空间分布向海湾内部显着增加，接近主要淡水输入，而一些物种则主要集中在稀表层（1 m深度）。对丰度-占有率关系的研究表明，更容易开花的物种是那些空间分布广泛且常年存在的物种，例如硅藻P. calliantha。尽管形成囊肿的物种很少见，但在冬季有利的资源供应和环境条件下，可以预见到风险会增加。

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  • 来源
    《Harmful Algae》 |2009年第5期|736-743|共8页
  • 作者

    Sofie Spatharis; Nicolas P. Dolapsakis; Athena Economou-Amilli; George Tsirtsis; Daniel B. Danielidis;

  • 作者单位

    University of the Aegean, Department of Marine Sciences, University Hill, 81100 Mytilene, Greece;

    University of Athens, Faculty of Biology, Department of Ecology and Systematics, Panepistimiopolis, 15784 Athens, Greece;

    University of Athens, Faculty of Biology, Department of Ecology and Systematics, Panepistimiopolis, 15784 Athens, Greece;

    University of the Aegean, Department of Marine Sciences, University Hill, 81100 Mytilene, Greece;

    University of Athens, Faculty of Biology, Department of Ecology and Systematics, Panepistimiopolis, 15784 Athens, Greece;

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  • 正文语种 eng
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  • 关键词

    abundance-occupancy; hetemcapsa; karlodinium; scrippsiella; toxic microalgae;

    机译：丰满度cap karlodinium;链球菌有毒微藻;

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