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首页> 外文期刊>Harmful Algae >Populations of the red tide forming dinoflagellate Noctiluca scintillans (Macartney): A comparison between the Black Sea and the northern Adriatic Sea
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Populations of the red tide forming dinoflagellate Noctiluca scintillans (Macartney): A comparison between the Black Sea and the northern Adriatic Sea

机译：形成甲藻鞭尾夜蛾（Macartney）的赤潮种群：黑海与亚得里亚海北部之间的比较

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Populations of Noctiluca scintillans (hereafter Noctiluca) were compared from two regions: the northeastern-central Black Sea and the northern Adriatic Sea. In both seas samples were collected in near-shore waters 2-3 times per month during 2004-2012. For analysis of feeding activities and seasonal dynamics additional cruise data on the open waters of the Black Sea were used. Comparison between the two populations shows similarity in size structure with two classes 401 -500 μm and 501 -600 μm being the most numerous. Seasonal changes in cell abundance in both seas demonstrated a regular annual maximum with the peak period of high abundances in May-June with additional sporadic peaks in other seasons. In spring the average number of food vacuoles in the cell (1.78) and the proportion of feeding cells in populations (79%) in the Adriatic Sea were similar to those in the Black Sea (1.58 and 76%). In September-October, these parameters were lower both in the Adriatic Sea (0.69 and 49%) and in the Black Sea (1.46 and 65%) demonstrating that Noctiluca was better provided with food in spring. Among biotic parameters (wet phytoplankton biomass, chlorophyll biomass and zooplankton species) only the concentration of the eggs of Calanus euxinus was significantly positively correlated with abundance of Noctiluca. The possible effect of a high concentration of copepod eggs on the growth of Noctiluca in the peak period is discussed. An obvious negative relationship was observed between Noctiluca cell numbers in the peak period and wind velocity in both seas. The most significant negative correlation was observed between the number of windy hours per month (velocity more than 5-6 ms~(-1)) and cell concentrations in the Black Sea (r= -0.92) and in the northern Adriatic Sea (r= -0.67). On this basis, a new hypothesis has been proposed and discussed: in connection with features of the food behavior of Noctiluca, its outbursts during the peak period are controlled by the wind. An evident positive relationship was observed between the number of Noctiluca in the peak period and its quantity in the preceding months in both seas. Thus, we suggest that abundance data during early spring and weather forecasts (winds) may be used for medium-term prediction of Noctiluca outbursts and red tides.
机译：从以下两个地区比较了夜光藻的种群（以下称夜光藻）：东北中部黑海和北部亚得里亚海。在2004-2012年期间，每月两次在近海水域中采样2-3次。为了分析进食活动和季节动态，使用了黑海露天水域的其他航行数据。两种种群之间的比较显示出大小结构上的相似性，其中最大的两个类别是401 -500μm和501 -600μm。两个海域中细胞丰度的季节性变化均显示出年均最大值，5-6月出现高丰度的高峰期，而其他季节则出现零星的峰值。春季，亚得里亚海的单元中食物液泡的平均数量（1.78）和饲养细胞在人口中的比例（79％）与黑海的相似（1.58和76％）。在9月至10月，亚得里亚海（0.69和49％）和黑海（1.46和65％）的这些参数均较低，这表明Noctiluca在春季可以更好地提供食物。在生物参数（湿性浮游植物生物量，叶绿素生物量和浮游动物种类）中，只有Calanus euxinus的卵浓度与夜光菌的丰度显着正相关。讨论了高峰期高浓度of足类卵对夜光藻生长的可能影响。高峰期的夜光藻细胞数与两海风速之间均存在明显的负相关。在黑海（r = -0.92）和亚得里亚海北部（r = -0.92）的每月大风小时数（速度大于5-6 ms〜（-1））与细胞浓度之间观察到最显着的负相关。 = -0.67）。在此基础上，提出并讨论了一个新的假设：结合夜蛾的食物行为特征，其在高峰期的爆发受到风的控制。在两个海域，旺季的夜光藻数量与前几个月的数量之间存在明显的正相关关系。因此，我们建议早春和天气预报（风）期间的丰度数据可用于夜蛾爆发和赤潮的中期预测。

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