PNRP 34(1) – 2015 r.

Vascular plants of the ‘‘Dąbrowa Krzymowska’’ nature reserve
(Pojezierze Myśliborskie, north-west Poland)

SUMMARY

The Dąbrowa Krzymowska nature reserve is one of the best preserved acidophilous oak forests Calamagrostio-Quercetum in Poland (ZARĘBA 1979, 1986; PAWLACZYK, KUJAWA-PAWLACZYK 1999). The oldest oaks are about 380 years. Vascular flora of the reserve contains 99 species. Most of them are common in polish flora (ZAJĄC A., ZAJĄC M. 2001). One species Veronica montana is endangered (‘‘V'') in West Pomerania (ŻUKOWSKI, JACKOWIAK 1995). Alien species are represented by 4 tree taxa (Aesculus hippocastanum, Pseudotsuga menziesii, Padus serotina, Robinia pseudoacaccia), 1 shrub (Ribes uva-crispa) and 1 herb species (Solanum nigrum).

Ladybird beetles (Coleoptera: Coccinellidae) of Wigry National Park

SUMMARY

This study's objective was a preliminary evaluation of the species composition of ladybird beetles (Coccinellidae) occurring in the area of Wigry National Park (NE Poland). Altogether, we recorded 38 species, which constitutes about 51% of the Polish fauna of Coccinellidae. Some of the species registered in this study are considered relatively rare in Poland. Most of these uncommon species are humid habitat specialists (Nephus redtenbacheri, Calvia quindecimguttata, Ceratomegilla notata, Hippodamia septemmaculata, Sospita vigintiguttata), although rare species associated with dry and warm sites (Scymnus femoralis, S. schmidti) and spruce forests (Scymnus abietis) were also found.

We failed to find several ladybird species relatively common throughout Poland, which certainly occur also in Wigry National Park. Further investigations in this area of unique natural value should allow their discovery as well as the discovery of some other, less common species.

Syrphidae (Diptera) of Trojmiejski Landscape Park
and nearby areas (northern Poland)

SUMMARY

Within Trójmiejski Landscape Park (TPK) and adjacent areas, a long-term study of the hoverflies (Diptera: Syrphidae) has been conducted, mainly in the years 1995 - 2000, 2003 - 2004, 2009 - 2014. The aim was to create a list of species occurring nowadays in this area and compare that with other regions of Poland.
This work is the first comprehensive study on Syrphid flies in Eastern Pomerania (northern Poland) for 100 years. As a result of the field study and revision of available material, 192 species were found, including 151 species within the administrative area of TPK, and 171 species in the immediate vicinity of the TPK, mainly in the valley of the River Reda. This represents a total of 46% of the fauna of Polish Syrphidae.
Four species new to the Polish fauna are discovered: Cheilosia alba, Chrysogaster virescens, Sphegina clavata, Xylota caeruleiventris as well as 13 species which are placed on the "Red list of threatened animals in Poland".
The large number of species recorded is evidence of high species diversity of Syrphidae in northern Poland. The proportion of rare species is 22%.
The authors provide a catalogue of all 192 species found during the study, supplemented with a further 23 Syrphidae species known from the literature in the nineteenth and first half of the twentieth centuries, but not found in the study area today. Taking into account the old records that cannot be confirmed, the list of Syrphidae of TPK and adjacent area contains a total of 215 species. It means TPK is now one of the most studied areas in Poland regarding this family of Diptera. Comparable numbers of species have been recorded only in the Bialowieża Forest and Bieszczady Mountains.
The analysis of species composition of Syrphidae between the study area and other parts of Poland show highest similarity to the Sudety Mountains and Lodz area, lowest similarity to other mountain regions: Tatra, Pieniny and Bieszczady, as well as to the valley of the River Nida.
Compared to the whole Polish fauna of hoverflies, TPK is characterized by a significantly lower share of phyto-, myco- and cambiopheges, which is compensated by a higher share of predators. The structure of trophic groups on the study area is very similar to Finnish fauna of Syrphidae.
The pressure of urbanization of Trojmiasto is the biggest threat to the Syrphid fauna of the area. Due to the fact that the protection of flies relies on the protection of their habitat, TPK and Valley Reda are jointly key areas for the conservation of the biodiversity of species in Eastern Pomerania in Poland.

SHORT FLORISTIC, FAUNISTIC AND MICOBIOTIC NOTES 

Nitelletum capillaris Corillion 1957
(Charetea fragilis Fukarek 1961 ex Krausch 1964)
in the buffer zone of the Biebrza National Park

SUMMARY

In April 2014, Nitelletum capillaris plant community was recorded in the Narew valley near Zajki village, in the buffer zone of the Biebrza National Park. Plant association was documented in a small pool (probably remnant of an oxbow lake) in the sandy floodplain. Together with the abundant Nitella capillaris occurred other macrophytes, e.g. Hottonia palustris, Batrachium aquatile, Rorippa amphibia, Sparganium erectum, Carex vesicaria and Callitriche sp. The Nitelletum capillaris plant association has not been phytosociologically documented and published in Poland until now - only few unpublished data are known. Both the species and its community are among the rarest and most endangered elements of the plant cover of Poland. Hirudo medicinalis (Hirudinea) has been also recorded. This is probably the result of continuing cattle grazing in the area around the oxbow lake.
The newly discovered site of Nitelletum capillaris does not seem to be endangered and the Nitelletum capillaris plant association can be more widespread in the Biebrza Basin, where numerous shallow and ephemeral water bodies in the floodplain zone still occur.

New localities of Marsh Angelica Ostericum palustre (Apiaceae)
in Kuyavian-Pomeranian region (north-central Poland)

SUMMARY

The March Angelica Ostericum palustre is an endangered and protected species in Poland (ZARZYCKI, SZELĄG 2006; CZARNA et al. 2014, ROZPORZĄDZENIE... 2014). In recent years several populations of this species were found in the Toruń city vicinity, and Grabie village near Służewo, near A1 highway in Kopanino village east of Toruń city, next to the Drwęca River between Golub-Dobrzyń and Brodnica town and in Zabłocie near Czernikowo village. Population size varies between several to more than 1000 individuals. All sites were found outside the protected areas.
Survival of a species is dependent mainly on the mowing of meadows and maintained groundwater levels. This species is probably more abundant in Poland than previously thought.