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The floral research on bryophytes was conducted in 2010 and 2011 in the area of three graduation towers in the Spa Park, as well as in the nature reserve of halophytes in Ciechocinek, in the Kujawy region. The research revealed the presence of numerous moss species - 84 species, including five partially protected and three strictly protected ones. Nine species were recognized as the most frequent taxa within the research area, including 4 species of orthotropic mosses and 5 species of plagiotropic mosses.
The floral and phytosociological research conducted between 1998-2001 in the area of the artillery range shows that there are 460 different species, including 363 vascular plants and 96 algae, bryophytes and lichens. The aforementioned count includes 45 taxa that are fully or partially protected. In the investigated area there are 30 species of vascular plants and 13 lichen species endangered to a different extent, referring to the scale of the whole region, for example: Aster amellus, Prunella grandiflora, Bryoria fuscescens, B. subcana, Peltigera praetextata and Ramalina fraxinea.Out of 335 species recorded in the same area by German researchers in the late 19th century and the early 20th century, the occurrence of 270 species was confirmed by our research, which constitutes 80.6%. The following species are considered as extinct, since they were not found again in the area: Adenophora liliifolia, Cephalanthera damasonium, C. rubra, Dracocephalum ruyschiana and Gladiolus paluster. During the one hundred years, which separate the two research projects, 95 new species appeared in the studied area, mostly archaeophytes and kenophytes. According to the phytosociological research, there are 8 plant associations and one plant community in the unforested part of the range. Among the most rare associations, the following should be mentioned: Caricetum arenariae, Caricetum ligericae and Festuco-Koelerietum glaucae. Calamagrostietum epigeji, Corniculario-Corynephoretum, Arctostaphylo-Callunetum are typical associations of this area. The association Scorzonero purpureae-Stipetum joannis and the community of Salix acutifolia-Epipactis atrorubens are the most valuable ones. They will become the most endangered associations if the excessive pressure by the army or the highway construction should cease in the future. To preserve the particularly valuable species and plant associations, new active preservation forms should be introduced in the whole area of the artillery range, especially after cessation of the excessive military exploitation. A part of the artillery range called "Piaski" should be protected as a sanctuary because of the association Scorzonero purpureae-Stipetum joannis, which occurs only here.
Opisano nowe stanowisko wyblinu jednolistnego Malaxis monophyllos (L.) Sw. (Orchidaceae) w Polsce północno-zachodniej, na obszarze, na którym gatunek ten uznawany był za wymarły. Nowo odkryte stanowisko położone jest w Borach Tucholskich, na terenie rezerwatu przyrody „Miedzno” (ATPOL CB69). Niewielką populację tego gatunku stwierdzono w olsie porzeczkowym Ribeso nigri-Alnetum. Skład florystyczny fitocenozy, w której rośnie wyblin, udokumentowano zdjęciem fitosocjologicznym
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Vaccinium ×intermedium Ruthe, the hybrid of V. myrtillus and V. vitis-idaea, by contrast with the parental species is very rare plant and has a discontinuous geographical range in north-western Europe. This paper describes the morphology of V. ×intermedium from Polish populations occurring in part of Pomeranian Lakeland in comparison with both parent species. The results presented here confirm the suggestions of earlier research that V. ×intermedium displays intermediate characteristics of leaf and floral morphology concordant with hybrid status. Also, is discussed the problem of the isolating mechanisms between parent species and hybrid's ecology.
A sample of Betula nana from the Linie reserve near Dąbrowa Chełmińska, have been fingerprinted using random amplified polymorphic DNA (RAPD). The high level of genetic variation was detected. All individuals had unique genotypes, supporting the generally high resolving power of RAPD’s. For the conservation strategy, information about the distribution of the genetic variation within and among populations plays very important role. Thus, extensive study in other populations of dwarf birch is needed.
The relief of the Zadroże Dune was described, as well as the comparison was done on its vegetation cover and the flora in its two phases of the development, i.e. before the afforestation of the dune and approximately 60 years after reconstruction of the forest. The first state was described in the paper dated 1949. During that period the dune constituted the first common study area for the research team consisting of ecologists and geographers from the Nicolaus Copernicus University. Our contemporary scientific studies were carried out in 2009. In the comparative analysis, a particular attention was paid to the distribution, the number and the size of heath patches with Arctostaphylos uva-ursi. In the description of the contemporary state of vegetation, the structure and the biomass of tree stands were included. The GIS and GPS technologies were applied in the comparative analysis of the vegetation, in the comparison of the former and contemporary cartographic materials, aerial and satellite images, as well as in the development of a digital elevation model. As a result of comparisons of the vegetation cover, it was found that the surface area of heaths decreased from 59.21 ares in 1948 to 2.96 ares in 2009. As a result of comparisons of the flora, it was found that 7 and 26 species of lichens occurred in 1948 and 2009 respectively, 5 and 42 species of mosses, 0 and 7 species of liverworts, as well as 102 and 204 species of vascular plants. The number of families, within which the species of vascular plants are classified, increased from 31 to 52. The compared floras have only 66 species in common. The percentage contribution of geographical and historical groups has undergone only inconsiderable changes during the 60-year period. Contribution proportions of non-synanthropic spontaneophytes and apophytes has changed slightly. Whereas, the contribution of alien species, mainly kenophytes and ergasiophytes significantly increased. This paper discuss the significance of natural and anthropogenic factors, which brought about this considerable range of transformations in the species composition and in the contribution of alien species.
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