The aim of the study was to compare the content of some chemical substances in a bark of about 3-year-old fast-growing poplars Populus deltoides × maximowiczii and Populus trichocarpa with literature data on the chemical composition of a bark of older deciduous trees. The Populus deltoides × ...

The article discusses gaseous air pollutants that have the greatest impact on forest ecosystems. This group of pollutants includes sulfur dioxide (SO₂), nitric oxides (NO and NO₂) and ozone (O₃). In the 20th century, the major contributor to forest degradation was sulfur dioxide, a gaseous...

The aim of the study was to determine the effect of small forest water reservoirs on the radial increment of Scots pine and Norway spruce. We selected four small water reservoirs that were reconstructed in autumn 2006 in the Maskulińskie Forest District (northern Poland). Around each reservoir we...

The aim of this study is to present the research results on the water retention of green roof on the example of a facility located in the district of Ursynów, Capital City Warsaw. The experimental site was a fragment of green patio of 25 cm substrate thickness which is a mixture of peat, sand and...

The main subject of research in this paper is the cost of cultivation in chosen forestry divisions which are based in the area of Regional Directorate of State Forests Szczecinek in years 2011-2015. The aim was to verify if the relationship between amount of costs incurred and if the fertility of...

Red osier dogwood Cornus sericea L. is a species native to North America, but spreading in Europe. It has been classified a kenophyte in Poland and is considered invasive. However, knowledge on its distribution is insufficient and lacking entirely for many parts of the country. Therefore, the aims...

Ca. 400 new records of Cerylonidae in Poland is reported. The only record of Cerylon bescidicum in Poland was based on misidentification and the species should not be included on lists of beetles of Poland. Cerylon fagi, C. ferrugineum, and C. histeroides are common in Poland, C. deplanatum and C....

The new chorological data concerning 25 species of the subfamily Cerambycinae are presented. The provided data come from observations and field research conducted in Western Poland over the last few decades as well as from historical materials.

New records of 14 species of longhorn beetles are presented, of which 6 taxa are recorded for the first time from the city of Warsaw. The necessity of Cerambyx cerdo L. active protection is emphasised. New host plants for two species are given. New abberation of Clytus arietis is described.

The main aim of this study was to analyze the variability of width as well as content of stable oxygen and carbon isotopes, and radiocarbon in Pinus sylvestris L. tree rings. Analysed Scots pine stand grew on the fresh mixed coniferous forest habitat type on site located in the vicinity of the...