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首页> 外文期刊>Palaeogeography, Palaeoclimatology, Palaeoecology: An International Journal for the Geo-Sciences >Statistically assessing the correlation between salinity and morphology in cysts produced by the dinoflagellate Protoceratium reticulatum from surface sediments of the North Atlantic Ocean, Mediterranean–Marmara–Black Sea region, and Baltic–Kattegat–Skagerrak estuarine system
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Statistically assessing the correlation between salinity and morphology in cysts produced by the dinoflagellate Protoceratium reticulatum from surface sediments of the North Atlantic Ocean, Mediterranean–Marmara–Black Sea region, and Baltic–Kattegat–Skagerrak estuarine system

机译：从统计学上评估北大西洋，地中海-马尔马拉-黑海地区和波罗的海-卡特加特-Skagerrak河口系统表层沉积物的鞭毛原角网藻产生的囊肿中盐度与形态之间的相关性

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Recent studies have correlated dinoflagellate resting cyst morphology to salinity and density variations in the water column, suggesting that morphology can be used for paleoceanographic reconstructions. However, the univariate statistics used by these studies are appropriate only where morphology is related to a single variable. Density is a function of salinity and temperature, so more advanced statistical methods are needed to understand which parameters affect morphology. In this study based on surface (coretop) sediments, a set of environmental variables (sea-surface salinity, temperature, nitrate, and phosphate) was simultaneously correlated to morphological variations seen in resting cysts produced by the dinoflagellate Protoceratium reticulatum (=Operculodinium centrocarpum sensuWall and Dale). Approximately 3200 measurements were obtained from the North Atlantic Ocean and used to generate a working model based on the Akaike information criterion. Hierarchical partitioning was then applied to establish the independent and joint effects for each predictor variable. Results from these analyses showed that while salinity constitutes the dominant variable affecting process length in the cysts of P. reticulatum in the North Atlantic, it is not the sole explanatory variable and thatmulticollinearity exists. Temperature and nutrients also showed a significant relationship to themorphology, requiringmultiple regression to construct a representative model. The applicability of the North Atlantic working model was finally evaluated by comparing the results to data from the Mediterranean, Marmara, and Black seas, and Baltic–Kattegat–Skagerrak estuarine system. This comparison showed regional differences in morphological–environmental correlation. While salinity constitutes the most important explanatory factor in both the North Atlantic and Baltic–Skagerrak system, this is not so for the Mediterranean–Black Sea region where temperature is the dominant variable. It is concluded that a predictive salinity model based on P. reticulatum cyst morphology has at best a regional application.
机译：最近的研究已经将鞭毛虫的静息囊肿形态与水柱中的盐度和密度变化相关联，这表明形态可用于古海洋学重建。但是，这些研究使用的单变量统计仅在形态与单个变量有关的情况下才适用。密度是盐度和温度的函数，因此需要更高级的统计方法来了解哪些参数会影响形态。在这项基于表层（核心层）沉积物的研究中，一组环境变量（海面盐度，温度，硝酸盐和磷酸盐）同时与网状鞭毛原角藻（Protoceratium reticulatum，= Operculodinium centrocarpum sensuWall）产生的静止囊肿中观察到的形态变化相关。和戴尔）。从北大西洋获得了大约3200个测量值，并根据Akaike信息标准生成了工作模型。然后应用分层划分为每个预测变量建立独立和联合效应。这些分析的结果表明，尽管盐度是影响北大西洋网纹假孢子囊长的主要变量，但它不是唯一的解释变量，并且存在多重共线性。温度和养分也显示出与形态的显着关系，需要进行多元回归以构建代表性模型。最后，通过将结果与地中海，马尔马拉海和黑海以及波罗的海-卡特加特海峡-斯卡格勒克河口系统的数据进行比较，评估了北大西洋工作模型的适用性。这种比较显示了形态与环境相关性的区域差异。尽管盐度是北大西洋和波罗的海-Skagerrak系统中最重要的解释因素，但对于温度是主要变量的地中海-黑海地区却并非如此。结论是，基于网状疟原虫囊肿形态的预测盐度模型充其量在区域性应用。

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