Abstract
The peatbogs and natural upper sections of streams in national parks in southeastern Poland represent unique study areas for research on freshwater diatom diversity. During studies conducted on diatoms in three Polish national parks, many little-known, very rare, and endangered species were noted. For most of the taxa presented in this article, especially from the <em>Adlafia</em>, <em>Eunotia</em>, and <em>Placogeia</em> genera, only single individuals have been observed, and only from a few localities worldwide. Moreover, this is the first presentation of SEM photodocumentation and descriptions for <em>Eunotia minutula</em> Grunow and <em>Fallacia sublucidula</em> (Hustedt) D. G. Mann. Based on both light and scanning electron microscopy, detailed descriptions of morphological characteristics, ecological notes, and new localities are presented for the following species: <em>Adlafia langebertalotii</em> Monnier &amp; Ector, <em>Caloneis undulata</em> (Gregory) Krammer, <em>Eunotia fennica</em> (Hustedt) Lange-Bertalot, <em>E. glacialifalsa</em> Lange-Bertalot, <em>E. groenlandica</em> (Grunow) Nörpel-Schempp &amp; Lange-Bertalot, <em>E. minutula</em> Grunow, <em>E. neocompacta</em> Mayama var. <em>neocompacta</em>, <em>E. superpaludosa</em> Lange-Bertalot, <em>Fallacia sublucidula</em> (Hustedt) D. G. Mann, <em>Pinnularia rhombarea</em> Krammer, <em>P. similiformis</em> Krammer, <em>Placogeia gereckei</em> (Cantonati &amp; Lange-Bertalot) Bukhtiyarova, and <em>Sellaphora vitabunda</em> (Hustedt) D. G. Mann.
Highlights
Most diatoms have been described as cosmopolitan species [1], the biogeographic distribution of several species has been defined [2,3]
The studies were conducted within the boundaries of three national parks (Fig. 1): the Bieszczady National Park (BdNP), Magura National Park (MNP), and Roztocze
The studies were conducted in two different oligotrophic habitats in southern Poland – the upper sections of watercourses and shallow depressions in peatbogs
Summary
Most diatoms have been described as cosmopolitan species [1], the biogeographic distribution of several species has been defined [2,3]. Many new rare, invasive, exotic species with very limited distribution were described in Europe, and globally [4,5,6,7]. Southeastern Poland comprises different geographical regions: lowlands in the north, low hills in the central region, and mountainous areas in the south. This part of Poland is characterized by a large variety of habitats, i.e., mountain and submountain valleys with streams (often forested), medium and large rivers (meandering, oxbow lakes), lakes, ponds, peatbogs, and swamps. Many protected areas are often home to rare and endangered species
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
