ABSTRACT

The French part of the Rhin-Meuse basin is quite heterogeneous due to the broad variability in pH and conductivity ranges of its rivers and streams. Parts of the basin are characterized by the presence of typical natural or anthropogenically induced brackish environments, showing a typical diatom flora. Since many brackish diatom species observed in these particular environments are often only poorly illustrated in literature used for biomonitoring, the present paper tends to fill this gap in our knowledge. Therefore, we illustrate in this work a large number of brackish taxa such as Cyclotella scaldensis, Skeletonema potamos, Thalassiosira gessneri, T. lacustris, T. weissflogii, Achnanthes secretitaeniata, Bacillaria paxillifera, Berkeleya rutilans, Entomoneis paludosa, Halamphora coffeaeformis, Haslea spicula, Nitzschia amplectens, N. aurariae, N. frequens, N. inconspicua and N. thermaloides. Additionally, one new species, Tabularia massenana sp. nov. is described based on detailed LM and SEM observations.

抽象的

Rhin-Meuse盆地的法国部分由于河流和溪流的pH值和电导率范围存在较大差异，因此具有很大的异质性。盆地的某些部分以典型的自然或人为诱发的微咸环境为特征，显示出典型的硅藻群落。由于在这些特定环境中观察到的许多咸淡硅藻物种通常仅在用于生物监测的文献中没有得到很好的说明，因此，本文倾向于填补我们所学知识的空白。因此，我们在这项工作中举例说明了许多咸淡的分类单元，例如小环scaldensis，肋骨potamos，海链gessneri，T.湖生，T. weissflogii，曲壳藻secretitaeniata，Bacillaria paxillifera，Berkeleya rutilans，Entomoneis蚊，Halamphora coffeaeformis，Haslea spicula，菱形amplectens，N. aurariae，N. frequens，N. inconspicua和N.thermooides。此外，一个新的物种，Tabularia massenana SP。十一月 基于详细的LM和SEM观察结果进行了描述。