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Faunistic review of Polish Platypodinae and Scolytinae (Coleoptera: Curculionidae)Based on a survey of the literature and collections, the distributions of the Platypodinae and Scolytinae (Curculionidae) within the present-day borders of Poland are summarized. An updated and annotated checklist is given of Polish pinhole borers (1 genus, 1 species) and bark beetles (35 genera, 110 species).Carphoborus cholodkovskyiSpessivtsev has been removed from the list; the presence ofHylastinus obscurus(Marsham),Pteleobius kraatzii(Eichhoff),Pityophthorus exsculptus(Ratzeburg),Cryphalus saltuariusWeise,Thamnurgus kaltenbachii(Bach),T. varipesEichhoff,Pityogenes irkutensis monacensisFuchs,P. saalasiEggers,Xyleborus eurygraphus(Ratzeburg) andX. pfeilii(Ratzeburg), reported by previous authors, needs to be confirmed by new findings.Pitophthorus carniolicusWichmann,Xylosandrus germanus(Blandford) andCrypturgus subcribrosusEggers were recorded generally from Poland.Hylastes plumbeusBlandford,Phloeosinus aubei(Perris),Gnathotrichus materiarius(Fitch),Orthotomicus erosus(Wollaston),Scolytus sulcifronsRey andTrypodendron laeveEggers (Knížek 2011) were erroneously recorded from Poland.

The quality of surface water in watercourses in the region of Lublin agglomeration was studied in 2012-2014. Biological and chemical indicators of the study for various sampling sites were detected and the resulting values of the indicators were processed statistically. Rivers characterized by small size and the flow and modification of the riverbed. The resulting low values of macrophyte river index and infusorial index pointed to a poor quality of surface waters. Chemical indicators of the quality of surface waters reached low values, only BOD and phosphates reached high values. The river is located outside the city and it is characterized by moderate potential ecological (III quality class), and the river within Lublin is insufficiently potential ecological (IV quality class). Statistical analysis showed high variability index values between the studied positions.

The purpose of the work was to determine the surface and subsurface water runoff and selected constituents of the matter contained and carried out from the eroded loess slope used as arable land. The research was carried out in 2008–2011 on the Lublin Upland. The quantity of water flowing out of the slope was measured and samples were collected in order to determine the concentration of the soil suspension of nitrogen and its forms as well as phosphorus and potassium. Soil tests were also carried out and the rainfall amount and intensity was monitored. The research results show that the amount of precipitation was significantly statistically correlated with the quantity of surface and subsurface water runoff and with the precipitation and surface runoff erosion indicator EI30 (correlations at the level of r = 0.75–0.78). In addition, the mass of eroded soil was strongly correlated with the erosion indicator of rain and surface runoff EI30 (r = 0.86). The annual soil losses were from 21.1 to 173.1 Mg ha−1. The concentration of chemical components dissolved in the surface and subsurface runoff water in most cases proved to be negatively statistically correlated with the amount of precipitation and indicator EI30. The correlation coefficients (r) were at levels from −0.32 to −0.52. The annual loss of nutrients caused by chemical erosion was: nitrogen 7.210–29.949 kg ha−1, phosphorus 0.846–5.279 kg ha−1 and potassium 7.065–21.660 kg ha−1. The highest intensity of water erosion was recorded in 2010, when root crops were grown in the field.

Gnathotrichus materiarius is listed as an alien ambrosia beetle in European fauna. This is an invasive species from North America, which was found in Europe (France) in the 1930s. In Poland, it was recorded in 2015. Already in 2017 numerous infestations of G. materiarius on lying Pinus sylvestris wood were obsereved. G. materairius is a xylomycophagous species and wood damage to its feeding is similar to that caused by striped ambrosia beetle Trypodendron lineatum. The paper presents sites of G. materairius occurrence found in 2016 and 2017. These include 15 sites located in managed forests (5 forest districts) as well as in 2 national parks situated along south-western border of Poland. G. materairius beetles were found in pheromone-baited traps used to monitor Ips duplicatus and I. amitinus or collected from infested Scots pine wood. The paper presents the description and characteristics of wood damage due to G. materiarius as well as its distinguishing features.

Abstract. This study suggests a method of valuation for wood coming from dead trees which was applied for pricing of such wood found in Polish forests. This study shows that in Polish forest there are approx. 52 million m 3 biocenotic wood coming from dead or dying trees with an estimated value of 1.5 billion PLN/10 years.

The paper estimates the possibility of obtaining solid biomass for energy purposes in the Biała Podlaska County (Lublin Voivodeship, Poland). The estimates were based on data on: forest area, orchards and tree stands, land use, crop structure, animal population, and marginal land area in the County. It was found that in most communes, there are great possibilities of obtaining biomass for energy purposes. The largest resource is straw (243,501 Mg per year), which should first be used in agriculture as animal litter and organic fertilizer. Only its surplus can be intended for the combustion and production of pellets and briquettes. In the County, large areas of poor quality land were inventoried, on which perennial energy plants with low requirements can be grown. Up to 113,595 Mg of biomass can be obtained there. The basic condition for the development of targeted energy crops is the emergence of a biomass market: installations that convert biomass into fuels or produce energy on a local scale and sell it to power plants. Currently, a commonly used resource is wood biomass from forests and wood processing, which is used as fuel in domestic boilers, as well as for the production of pellets and briquettes.