In this study, the field ecology of Kryptoperidinium sp. was examined in two Mediterranean shallow lagoons, Calich (CA) and Santa Giusta (SG) in Sardinia, Italy. Kryptoperidinium cell density and the environmental conditions were examined monthly from 2008 to 2015 in CA and from 2011 to 2016 in SG. Cell morphology was determined by observing specimens taken from the field and from cultures that were established by single-cell isolation from samples collected in the two lagoons. The molecular identity of strains from each lagoon was also ascertained. The growth rates of the strains were determined under three different temperature conditions and six salinity treatments. The two wild populations shared the same morphology and the cultured strains were morphologically and molecularly identical. The SSU and 5.8S phylogenies show the presence of two clusters within the available Kryptoperidinium sequences and the strains obtained in this study clustered with others from the Mediterranean and Baltic. The multiannual dynamics of Kryptoperidinium sp. in the field significantly differed in the two lagoons, showing much higher cell densities in CA than in SG. The presence of Kryptoperidinium sp. was detected throughout the year in CA, with recurrent blooms also affecting the adjacent coastal area. In contrast, Kryptoperidinium sp. was sporadically observed in SG. The variation in the environmental parameters was fairly wide during the presence and blooms of Kryptoperidinium sp., especially in CA. The application of Generalized Linear Models to the field data revealed a significant role of rainfall and dissolved inorganic nitrogen on the presence and blooms of the species. Although growth rates were similar between the two strains, significant differences were detected for the 10 and 40 salinity treatments. The results obtained in this study add to our knowledge about the ecology of a harmful species that is not well understood in transitional ecosystems such as Mediterranean lagoons.

在这项研究中，Kryptoperidinium sp。的田间生态。在意大利撒丁岛的两个地中海浅泻湖卡利奇（CA）和圣朱斯塔（SG）中进行了检查。rypto虫从2008年至2015年，每月在CA和从2011年至2016年在SG每月检查一次细胞密度和环境条件。通过观察从野外采集的标本和从两个泻湖中采集的样品进行单细胞分离而建立的培养物中，确定细胞的形态。还确定了每个泻湖中菌株的分子同一性。在三种不同的温度条件和六种盐度处理下确定菌株的生长速率。这两个野生种群具有相同的形态，并且所培养的菌株在形态和分子上均相同。SSU和5.8S系统发育显示可用的per包膜中存在两个簇在这项研究中获得的序列和菌株与来自地中海和波罗的海的其他物种聚在一起。Kryptoperidinium sp。的多年动态。在两个泻湖中，田间的细胞密度显着不同，显示出CA中的细胞密度比SG中高得多。Kryptoperidinium sp。的存在。全年在加利福尼亚州检测到该病，反复开花也影响了附近的沿海地区。相比之下，Kryptoperidinium sp。在SG中偶尔观察到。rypto idi的存在和开花期间环境参数的变化相当大。sp。，尤其是在CA中。广义线性模型在田间数据中的应用揭示了降雨和溶解的无机氮对物种的存在和开花的重要作用。尽管两个菌株之间的生长速率相似，但是在10和40种盐度处理中检测到显着差异。这项研究获得的结果增加了我们对有害物种生态学的了解，而这些知识在过渡生态系统（如地中海泻湖）中尚未得到很好的理解。