Determination of the relationships between environmental factors and diatom assemblages is usually made for several hundred lakes spread over a large area. However, the analysis of several lakes located near Lake Wigry also gives interesting results. Lakes in Wigry National Park (Poland) with broad similarity of geological origin show clear limnological, physical, and chemical differences. Here, we report on an investigation into how these dissimilarities influence diatom assemblages. Hierarchical Cluster Analysis showed that the studied lakes can be divided into three groups: (1) disharmonic, (2) harmonious with greater human impact on the environment, and (3) harmonious with a more limited human impact. The harmonious lakes could be divided into two groups that are mainly in line with the contents of the chloride and sulfates ions taken as indicative of human impacts on the environment. Overall, the three groups had different dominance structures, as reference to the Dominance Index (DI) made clear (mean values being: (1) −70.54%, (2) −72%, and (3) −54.58%, Generalized Linear Models with the categorical independent variable (group) showed significant differences between groups (for 1–3, 2–3) p value < 0.05). Lakes impacted by anthropopressure and disharmonic ones had the strongest dominance structure. More broadly, DI differences between the groups are consistent with the Species Pool Hypothesis (SPH), while studied differences can be said to result from natural geological dissimilarities, as well as disparate anthropogenic impacts.

中文翻译：

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波兰东北部湖泊的湖泊学特征和硅藻优势

通常要对分布在大面积上的数百个湖泊确定环境因素与硅藻组合之间的关系。但是，对Wigry湖附近几个湖泊的分析也得出了有趣的结果。威格里国家公园（波兰）的湖泊具有相似的地质起源，在湖泊，物理和化学方面存在明显的差异。在这里，我们报告了有关这些差异如何影响硅藻组装的调查。层次聚类分析表明，所研究的湖泊可分为三类：（1）不和谐；（2）对人类环境影响更大的和谐；（3）对人类影响有限的和谐。和谐的湖水可以分为两组，主要与氯离子和硫酸根离子的含量一致，这表明人类对环境的影响。总体而言，三组具有不同的优势结构，明确的优势指数（DI）表示（平均值为：（1）-70.54％，（2）-72％和（3）-54.58％，广义线性具有分类自变量（组）的模型显示组之间存在显着差异（针对1-3、2-3）p值<0.05）。受人为压力和不和谐影响的湖泊具有最强的优势结构。更广泛地说，各组之间的DI差异与物种库假说（SPH）相一致，而研究的差异可以说是由于自然地质差异和不同的人为影响造成的。