Northern Poland Research Articles

How Does Blue Infrastructure Affect the Attractiveness Rating of Residential Areas? Case Study of Olsztyn City, Poland

Blue Infrastructure (BI) is a system of water-based ecological and engineering interactions that provides multiple social and ecosystem benefits in an urbanized environment. The study answers the questions: (1) Can the assessment of the attractiveness of residential areas be influenced by the availability of water reservoirs with a specific functionality? (2) What are the indicators that determine this impact? The research aimed to develop a methodology for the evaluation of residential neighborhood spaces, considering the indicator of the functional value of water bodies and their accessibility. The following research hypothesis, that the recreational and esthetic functions of water bodies along with the accompanying infrastructure are the most attractive features that hold the greatest significance in evaluating residential areas close to them, was verified. Cartographic and field inventory studies were conducted to prove this. An inventory form was applied along with social research using a geo-survey to determine the ranking of individual water bodies. As part of the test of the developed method, all water bodies in the city of Olsztyn (northern Poland) were evaluated. The test revealed that the indicators related to the functional value of water bodies and their accessibility influence the assessment of the residential neighborhoods’ attractiveness. Therefore, they should be considered in the assessment of cities containing both natural and anthropogenic water bodies.

Reconnaissance archaeomagnetic study of ancient bricks from Northern Poland

In total, 24 brick samples for archaeomagnetic studies were taken from ten historical buildings constructed between c.1280 AD and 1630 AD in northern Poland. Eight of them are from the gothic period. The Thellier–Thellier archaeointensity protocol was used in order to determine the ancient intensity and inclination registered by the bricks. In total, 28 representative specimens from 16 bricks gave successful archaeointensity determination with category B of results quality. For 25 of them the corrections for anisotropy of thermoremanent magnetization and cooling rate were introduced. A large number of specimens classified as category C (48%) is due to a high value of relative additivity check error d(AC) caused most probably by the presence of multi-domain magnetite. The curvature parameter k exceeds the limit value in 11 specimens. However, in the same sample specimens with k higher than 0.270 have provided very similar values of archaeointensity than those with k below this limit. Corrected data are convergent with the Central European master curve of archaeointensity. The corrections of raw data reduce their dispersion at specimen/sample level in most of sites.

Rozmieszczenie form żelaza w różnych typach czarnych ziem Pojezierza Chełmińskiego jako wskaźnik procesu glebotwórczego

Rozmieszczenie form żelaza w różnych typach czarnych ziem Pojezierza Chełmińskiego jako wskaźnik procesu glebotwórczego

Factors Influencing the Tendency of Young People to Migrate Abroad – An Example From Northern Poland

Abstract Subject and purpose of work Determining the directions of foreign migration of students of management of the University of Warmia and Mazury (UWM) in Olsztyn and the factors encouraging young people to emigrate. Materials and methods A diagnostic survey method was used. This paper presents part of the results of a wider survey of young people conducted in early 2021. Participation in the study was anonymous and voluntary. A non-probabilistic sampling technique known as convenience sampling was used. The survey covered the entire population of management students at UWM in Olsztyn. 93 questionnaires were returned. Correspondence analysis was used to verify the hypotheses. Results Economic factors proved to be the most important factors for respondents: higher wages, greater job and promotion opportunities abroad. Conclusions Young people show a high tendency to migrate abroad, with Germany and the UK being the main destinations. They see foreign migration as a way to improve their life situation. In order to keep them on the domestic labour market, competition regarding wages should be increased and flexible work should be allowed.

Assessment of Early, Mid-Early, and Mid-Late Soybean (Glycine max) Varieties in Northern Poland

Assessment of Early, Mid-Early, and Mid-Late Soybean (Glycine max) Varieties in Northern Poland

Comparing Object-Based and Pixel-Based Machine Learning Models for Tree-Cutting Detection with PlanetScope Satellite Images: Exploring Model Generalization

Despite utilizing various remote sensing datasets, precise tree-cutting detection remains challenging due to spatial and spectral resolution constraints in satellite imagery, complex landscapes, data integration issues, and the need for accurate multi-temporal reference datasets. This study investigates the utilization of PlanetScope (PS) satellite images, along with pixel-based (PBIA) and object-based (OBIA) image analysis, for accurate mapping of forest cover and detection of tree cuttings. Detailed multi-temporal reference datasets were collected based on airborne laser scanning (ALS)-derived canopy height models (CHM) and very high-resolution (VHR) aerial orthomosaics. Reference datasets were used to train three machine learning (ML) models: random forest (RF), support vector machine (SVM), and feed-forward neural network (Nnet) in two forest districts located in Western and Northern Poland. The study also assessed the generalization capabilities of the best model in both local and temporal contexts. Regarding forest cover mapping, the OBIA RF classifier outperformed all other models with an overall accuracy (OA) of 99.27 % and Kappa of 98.18 %, while the PBIA SVM model showed the lowest (OA = 97.18 %, Kappa = 94.35 %). The testing of the model's generalization confirmed the performance of the OBIA RF model, with the Dice Coefficient ranging from 95.86 % to 96.74 %. The methodology's effectiveness in tree-cutting detection was demonstrated, with the detection rate ranging from 96.20 % to 99.39 % for the total number of cuttings, and from 99.45 % to 99.86 % for the total volume. In conclusion, the integration of PS satellite images, spectral-textural features, and generalized ML models proves to be effective for tree-cutting detection.

An integrated archaeo-palaeoenvironmental approach to the study of human-environment relationships in the Wierzchowo Lake microregion (Northern Poland) during the Mid- to Late Holocene

The area surrounding Wierzchowo Lake, located in the central part of Pomerania (Northern Poland), is of particular interest from the point of view of the development of past settlements. Archaeological data have revealed human activity during various periods, ranging from the Palaeolithic through the Modern Period. This may suggest the relative and long-term attractiveness of this area. Among archaeological sites from this microregion, a monumental, well-preserved hillfort located in the Wierzchowo Lake peninsula stands out. Although limited excavations were carried out and numerous archaeological materials were collected, its origin remains unclear. Unfortunately, this hillfort could not be properly investigated during the excavations, due to the conservation conditions resulting in a high level of administrative protection. Having these limitations in mind, it was decided to conduct a palaeoenvironmental investigation in the vicinity of this hillfort and correlate its results with the extensive archaeological information available for this area. An investigation based on pollen, charcoal, and geochemical analysis of the lake sediments and their juxtaposition with the available archaeological record, a broad insight into the past of this region, and the nature of the relationship between people and the natural environment were revealed. The first traces of permanent settlement have been linked to the Funnel Beaker culture. A strong increase in human impact within the microregion and important changes in local vegetation (e.g., deforestation, the spread of ruderal habitats) have been associated with the activities of Lusatian culture groups at the end of the Late Bronze Age. A significant transformation of the natural environment and modification of farming practices has been recorded during the Roman Period (Wielbark culture communities) and Medieval Times (Slavic culture). Changes in vegetation composition have also been related to climatic fluctuations around 850 BCE, during the Migration Period and Little Ice Age, when temporary settlement regressions were observed.

The genomic response to urbanization in the damselfly Ischnura elegans.

The complex and rapid environmental changes brought about by urbanization pose significant challenges to organisms. The multifaceted effects of urbanization often make it difficult to define and pinpoint the very nature of adaptive urban phenotypes. In such situations, scanning genomes for regions differentiated between urban and non-urban populations may be an attractive approach. Here, we investigated the genomic signatures of adaptation to urbanization in the damselfly Ischnura elegans sampled from 31 rural and urban localities in three geographic regions: southern and northern Poland, and southern Sweden. Genome-wide variation was assessed using more than 370,000 single nucleotide polymorphisms (SNPs) genotyped by ddRADseq. Associations between SNPs and the level of urbanization were tested using two genetic environment association methods: Latent Factors Mixed Models and BayPass. While we found numerous candidate SNPs and a highly significant overlap between candidates identified by the two methods within the geographic regions, there was a distinctive lack of repeatability between the geographic regions both at the level of individual SNPs and of genomic regions. However, we found "synapse organization" at the top of the functional categories enriched among the genes located in the proximity of the candidate urbanization SNPs. Interestingly, the overall significance of "synapse organization" was built up by the accretion of different genes associated with candidate SNPs in different geographic regions. This finding is consistent with the highly polygenic nature of adaptation, where the response may be achieved through a subtle adjustment of allele frequencies in different genes that contribute to adaptive phenotypes. Taken together, our results point to a polygenic adaptive response in the nervous system, specifically implicating genes involved in synapse organization, which mirrors the findings from several genomic and behavioral studies of adaptation to urbanization in other taxa.

The presence of wolves leads to spatial differentiation in deer browsing pressure on forest regeneration

With the recent return of large carnivores to forest ecosystems, an important issue for forest owners and managers is how large predators influence the behaviour of their natural prey and, consequently, cervid browsing pressure on forest regeneration. To investigate this issue, we analysed deer pressure on Scots pine and European beech plantations in northern Poland's ecosystems with and without permanent wolf populations. Two characteristics were used to describe deer browsing patterns in plantations: distance from the forest edge (spatial pattern of browsing) and number of saplings browsed (browsing intensity). Beech saplings were more intensively browsed by deer compared to pine saplings. In a forest ecosystem not inhabited by wolves, spatial variation in browsing patterns on small-sized beech plantations was the same between the edge and the center. In contrast, browsing pressure by deer was greater at the edges on large-sized pine plantations. The presence of wolves reduced deer browsing on beech and increased browsing on pine saplings. In addition, deer foraging behaviour changed in large-sized pine plantations, and browsing pressure increased only in the central areas of the plantations. We assume that the presence of wolves in a forest landscape is an important factor that alters browsing pressure on the youngest stands and their spatial pattern, and that this may be a major factor in stand regeneration, especially in small forest patches.

The molecular population structure of Swertia perennis (Gentianaceae) in Central Europe

Phylogeographic analysis of Swertia perennis, a typical European subalpine springtime species, revealed the existence of at least five major phylogenetic lineages. A large phylogeographic separation exists among these geographical regions, which confirms the existence of glacial refugia in the Pyrenees, but also in the Eastern and Central Alps. The results obtained from the analyzes indicate the existence of three major differences between the populations of the Alps and the Pyrenees, but also between the populations of the Alps and those of other geographical regions (Carpathians, southern Czech Republic, Sudetes and northern Poland). The studied populations from the Black Forest and from north-eastern and southern Poland are a relic of the former wider distribution of these (periglacial) genetic groups within Swertia perennis. Our results also confirm the existence of biogeographical links between the Carpathians and the Hercynian Range and the Alps. Certainly, there was an exchange of genes between populations located in the eastern Alps, the Carpathians and the Hercynian ranges (Czech Republic, Jeseníky, Sudetes, Ore Mountains). This confirms previous results of comparative studies on the genetic diversity of populations of other vascular plant species.

Viscoelastic Strains of Palaeozoic Shales under the Burger’s Model Description

This article presents the results of creep studies of Palaeozoic shales from the Baltic Basin in which the exploitation of shale gas in Poland was planned. Knowledge of instantaneous and long-term properties investigated in triaxial stress conditions is important from the point of view of exploitation techniques related to hydraulic fracturing. Rheological phenomena also play an important role in the analysis of the initial stress in shales, the knowledge of which is indispensable in the hydraulic fracturing process. The tests were carried out on samples representing four siltstone–claystone lithostratigraphic units occurring in the Baltic Basin. The studies and analyses were aimed at determining the character of creep in shales, selection of the appropriate rheological model for the analyzed rocks, and determination of the threshold of the linear creep under triaxial compression conditions. An original approach together with analysis results are presented here, which enable the separation and monitoring of shear and volume creep effects, and on this basis, the determination of the significance of the contribution of volume creep in the entire creep process. A relatively simple methodology for determination of the parameters of the Burgers model using this division is presented. The original value of the article is also due to the test results themselves and the parameter values of the analyzed model for triaxial creep of shales, which are not numerous in the literature. The investigations were performed at various loading levels in relation to the triaxial strength of the shales. Depending on the load, at its low values up to 0.7 (σ1 − σ3)max, creep had a determined character and did not show features of progressive creep. The linear creep threshold was also analyzed in this range. The loading level of 0.7 (σ1 − σ3)max was the limit of linear creep. Exceeding this load resulted in the loss of the linear character of creep, which in consequence lead to the subsequent third creep phase ending with rock damage. Parameters of the Burger’s model for gas shales from the Baltic Basin (northern Poland) were identified. There are significant differences in the behavior of shales depending on the lithostratigraphic unit from which the samples were collected. The mineral composition of the shales also influenced their behavior.

Origin and post‐glacial evolution of surface cracks: A case study from the area of the Last Glaciation, north‐eastern Poland

AbstractThe analysis of LiDAR‐based digital elevation models revealed the existence of groups of longitudinal fractures in the ground in northern Poland at the limit of the ice sheet's extent during its last maximum. Our research on the closed elongated depressions (CEDs) of the Jedwabno test field (Szuć site, north‐east Poland) focuses on explaining their origins and their post‐glacial history. This region was covered by an ice sheet and glacitectonically active during the Vistulian, and at least some surface fractures are possible witnesses to this activity. Using geomorphological mapping, sedimentological and geophysical research, we assumed it was related that the origin of these features here is associated with groundwater migration at the end of the Vistulian glaciation or later when groundwater flow intensified due to a rapid climate warming that caused permafrost to melt. The thawing of permafrost caused to transition from continuous permafrost to discontinuous, which in turn created groundwater flow that was probably responsible for the development of the surface cracks (fractures). Radiocarbon, palaeobiological (pollen, Cladocera) and geochemical studies allowed for an estimation of the formation time of these unique surface cracks in the Older Dryas. Prevailing conditions were also reconstructed for the later dynamic changes of the end of the Late Vistulian glaciation and in the Late Holocene until the Subatlantic Period (Megalayan stage). The surface cracks with steep slopes, despite their small area, are extraordinary sedimentation traps that have, in a special way, retained an almost complete record of the environmental and climate changes of the Late Glacial. There are sedimentological gaps in the Holocene, especially after the Preboreal (old part of the Greenlandian Stage), caused by changes in water levels, aeolian processes and human activity.

Genetic diversity and population structure of the endangered Rubus chamaemorus populations in Poland

Rubus chamaemorus in Europe is currently only found in scattered sites in Central Europe, mainly in mountainous areas but also in lowlands, probably reflecting its relict nature. Unfortunately, so far, there is little information on the genetic diversity of R. chamaemorus populations in Central Europe. Therefore, in this study, we used genetic markers to investigate variation in 21 of its European populations. Using a Bayesian approach, STRUCTURE software analysis was applied to the six clusters that best represented the genetic structure of the cloudberry populations. The results indicated the presence of low genetic diversity between populations in geographical groups, but high diversity between geographical regions. These results were somewhat predictable because the vast lowlands that separate the mountains in Poland from the population of R. chamaemorus in the north are a significant geographical barrier to gene flow over long geographical distances. Isolation by distance may also explain the genetic distinctness between populations found in the various regions in Poland and populations found in Scandinavia. It is likely that there is a genetic melting pot for R. chamaemorus in the region of northern Poland. This is often the case in small areas where populations from different geographic regions meet. It is often difficult to indicate the migration routes of species and to confirm where individual populations come from, but their occurrence is favored by isolation in mountain valleys and in forests, which are a barrier to the spread of pollen.

Mass-Movement Causes and Landslide Susceptibility in River Valleys of Lowland Areas: A Case Study in the Central Radunia Valley, Northern Poland

This work aims to analyse the mechanisms and factors contributing to shallow soil landslides in river valleys entrenched in lowlands on the example of the Central Radunia Valley. The combination of susceptibility analysis using geographic-information-system-based statistical models, field surveys, analysis of archival materials, and numerical modelling for the analysis of slope stability and hydrogeological processes allows for comprehensive landslide reconstruction, mass movement mechanism description, and an explanation of the role of triggering and causal factors. The results emphasise the need for cross-disciplinary studies of shallow soil landslides. The identification and prioritisation of the causal factors indicate that geomorphological conditions play a particularly important role. The current study shows that the greatest influence on landslide formation in the Central Radunia Valley is slope angle, as determined using a high-resolution digital elevation model. The slope angle factor is sufficient to produce a reliable susceptibility map (the areas under the curve of the success rate and prediction rate curves are 87.84% and 85.34%, respectively). However, numerical modelling of slope failure also clearly indicated that there was a significant influence of anthropogenic impacts on the landslide process. We determined that the main triggering factor causing the January 2019 Rutki landslide was related to the drilling of a borehole on 10 January 2019. The water used for drilling hydrated the soil and thus weakened the stability conditions.

Small Modular Reactors (SMRs) as a Solution for Renewable Energy Gaps: Spatial Analysis for Polish Strategy

The integration of Small Modular Reactors (SMRs) into energy systems requires a meticulous assessment of various factors, spanning renewable energy potential, legal frameworks, technical considerations, community engagement, and consumer preferences. This article synthesizes a multifaceted discussion on the subject, focusing on the need for comprehensive analyses before deciding to implement SMRs. Drawing insights from geographic information systems (GIS) and lessons from renewable energy development in Poland, this paper underscores the significance of aligning energy strategies with local needs, emphasizing stakeholder participation. This study examines the factors influencing location attractiveness for various energy technologies, including small modular nuclear reactors (SMRs), wind, solar, and hydroelectric power plants, within Poland. Employing 17 indicators sourced from Statistics Poland and URE, coupled with the application of the k-means algorithm, we outline four distinct clusters that delineate the zones of location attractiveness for SMRs and other renewable energy sources. While large and medium-sized cities exhibit optimal location attractiveness, coastal counties in northern Poland emerge as more suitable for renewable energy sources than for SMRs. The study outlines four distinct energy development strategies based on typologies of regions, each tailored to maximize the utility of available resources and minimize environmental impact. The strategies encompass renewable energy utilization, energy efficiency enhancement, energy diversification, and adaptation through innovation. Emphasizing the interplay between renewable energy potential, energy demand, and local conditions, the research suggests the strategic deployment of SMRs as part of an energy mix in areas where renewable energy resources are limited. By leveraging SMRs’ continuous energy production, these reactors can complement intermittent renewables, bolstering energy security.

Organic Inputs Positively Alter the Bacteriome of Post-Agricultural Soils

Agriculture can degrade soils and reduce microbial diversity. The reduction in microbial diversity of degraded soils is due to their long-term agricultural use. In most cases, such areas are afforested but rarely succeed in converting them into first-generation pine forests without adequately revitalizing the soils and restoring the natural relationships characteristic of forest habitats. This is possible thanks to the positive changes in soil biodiversity. To facilitate and enhance this phenomenon in the present experiment, various forms of organic matter were added to the soil: pine bark compost scattered on the soil surface (BCS) or placed under the roots of the seedlings at planting (BCR), woody debris (WW) and sawdust (S), while the control plot was not treated. The studies started in 2001 on two experimental plots, a poorer one in Bielsk and a more fertile one in Czarne Człuchowskie (eastern and northern Poland, respectively). The following year, 2-year-old pine seedlings (Pinus sylvestris L.) were planted on the plots. After 20 years, the physicochemical properties of the soil and its microbial composition were determined and compared with the control. The results encourage the use of organic matter for established pine forest crops on post-agricultural land for revitalization: C, N, and P content increased both in the organic layer and in the topsoil (up to 40 cm), where most fine roots are located. The total content of exchangeable base cations (Ca, Mg, K) and the sorption capacity of the soils (a measure of the ion binding capacity of the soil) also improved. The genetic analyses carried out using the molecular method (NGS) showed positive changes in the composition of the soil microbiome. Compared to poorer soil conditions in richer habitats, the number of taxa increases when organic matter is added, leading to significant qualitative changes in the bacteriome. The addition of organic material from the forest had a positive effect on the bacterial communities, which in turn accelerated the changes in the diversity of bacteriomes characteristic of agricultural soils and brought them closer to the forest ecosystem. The organic horizon was restored, and at the same time, the biodiversity of the soil microbiome increased, which is important for the health and sustainability of pine stands on formerly agricultural land.

Ericoid shrub encroachment shifts aboveground-belowground linkages in three peatlands across Europe and Western Siberia.

In northern peatlands, reduction of Sphagnum dominance in favour of vascular vegetation is likely to influence biogeochemical processes. Such vegetation changes occur as the water table lowers and temperatures rise. To test which of these factors has a significant influence on peatland vegetation, we conducted a 3-year manipulative field experiment in Linje mire (northern Poland). We manipulated the peatland water table level (wet, intermediate and dry; on average the depth of the water table was 17.4, 21.2 and 25.3 cm respectively), and we used open-top chambers (OTCs) to create warmer conditions (on average increase of 1.2°C in OTC plots compared to control plots). Peat drying through water table lowering at this local scale had a larger effect than OTC warming treatment per see on Sphagnum mosses and vascular plants. In particular, ericoid shrubs increased with a lower water table level, while Sphagnum decreased. Microclimatic measurements at the plot scale indicated that both water-level and temperature, represented by heating degree days (HDDs), can have significant effects on the vegetation. In a large-scale complementary vegetation gradient survey replicated in three peatlands positioned along a transitional oceanic-continental and temperate-boreal (subarctic) gradient (France-Poland-Western Siberia), an increase in ericoid shrubs was marked by an increase in phenols in peat pore water, resulting from higher phenol concentrations in vascular plant biomass. Our results suggest a shift in functioning from a mineral-N-driven to a fungi-mediated organic-N nutrient acquisition with shrub encroachment. Both ericoid shrub encroachment and higher mean annual temperature in the three sites triggered greater vascular plant biomass and consequently the dominance of decomposers (especially fungi), which led to a feeding community dominated by nematodes. This contributed to lower enzymatic multifunctionality. Our findings illustrate mechanisms by which plants influence ecosystem responses to climate change, through their effect on microbial trophic interactions.

Human Impact on Water Circulation Patterns in Raised Bogs of the Baltic Type, Northern Poland

Raised bogs of the Baltic type are unique because of their geomorphologic structure and hydrologic conditions. There are about 80 bogs of this type in Poland. All are affected by human impact, and their water circulation patterns are disrupted by artificial outflows. The aim of the study was to show the effects of human impact on water circulation patterns in raised bog on an example of the Wielkie Bagno peat bog. The main work consisted of field studies, during which measurements of groundwater fluctuations, flows at main outflows, and hydrographic mapping were performed. Data on precipitation and evaporation were also obtained from state institutions. Research has shown that fluctuations in groundwater levels in the Wielkie Bagno bog average 78 cm per year (hydrological years 2018–2019) and the bog is in poor condition. This is mainly due to climate change, which manifests itself in too little precipitation in summer and an increase in evaporation, a too dense drainage network causing the lowering of the groundwater level in the peat bog, and the close proximity of a peat mine causing significant drainage of water from the examined peat bog, as well as too large fluctuations of groundwater during the year and in individual months. In some areas, a near-surface layer of the bog was also detected, about 30 cm thick, which is a sign of bog desiccation (especially in summer). Water balance data were used to show that the quantity of water available in the bog is determined by atmospheric precipitation, which is too small in the warm period. As a consequence, there are months with a negative climatic balance. It was also observed that factors such as physical location in different parts of the bog and the degree of degradation also affect water circulation patterns in the study area. At the moment, the most important task in the peat bog is to raise the groundwater level, reduce its fluctuations, and reduce human pressure on the bog.

Reference evapotranspiration during the growing season in Poland (central Europe) in response to ongoing climate changes (1966–2020)

AbstractEvapotranspiration is an important part of the water cycle and influences, for example, water management and agricultural production. The article presents temporal and spatial changes in reference evapotranspiration (ETo) in the growing season (April–September) against the background of climatic conditions in Poland in the years 1966–2020. ETo was calculated using the Penman–Monteith method using data from 37 meteorological stations in the network of the Institute of Meteorology and Water Management‐National Research Institute. For the growing season of April–September, the average sum of ETo for Poland was 529 mm. In terms of spatial distribution, the values were lowest in northern Poland (Kołobrzeg, 480 mm; Lębork, 488 mm) and highest in the central lowlands (Warsaw, 570 mm; Poznań, 566 mm). For individual months, the average sum of ETo ranged from 53 to 63 mm in April and September to 108–112 mm in June and July. In Poland, in the years 1966–2020, ETo showed a statistically significant upward trend of 16.4 mm/10 year. This is the result of, inter alia, statistically significant increases in sunshine duration and air temperature and a decrease in relative humidity (respectively: 62 h/10 year, 0.40°C/10 year and −1%/10 year) during the growing season in Poland. Within the multiyear study period, the maximum ETo values occurred in 2018, reaching values of >700 mm. At that time, Poland was under the influence of very intense anticyclonic circulation. This is confirmed by the relationship between ETo and the anticyclonic circulation index for central Poland, which is statistically significant for the 55 study years.

The Late Palaeolithic in Toruń Basin in the light of the latest research in Brzoza, Site 50

Abstract This paper The data from the article was presented by the author during 16th SKAM Lithic Workshop (“Fossil Directeur”. A Phenomenon over Time and Space), 21–23 October 2019, Nitra, Slovak Republic, presentation: The Late Palaeolithic in Toruń Basin in the light of the latest research in Brzoza, site 50 (poster session). presents the preliminary findings related to the excavations in Brzoza site 50, commune Wielka Nieszawka, Kuyavian-Pomeranian Voivodeship (Poland). The Late Palaeolithic site complex in Brzoza – until the end of 1990s known as Toruń-Rudak – is located it Toruń Basin (Poland), in the grounds of a military shooting range on the left bank of Vistula south of the city. According to the Kuyavian-Pomeranian Voivodeship Monuments Conservator the whole complex was defined as one, site no. 50. Rescue excavations in Brzoza in years 2015–2018 were conducted by the District Museum in Toruń. In total 276 m2 were excavated, resulting in documentation of over 11 000 flint products. The research was funded from the Kuyavian-Pomeranian Voivode budget via the Kuyavian-Pomeranian Voivodeship Monuments Conservator and the District Museum in Toruń. The research consisted of archaeological exploration at the remains of the dune embankment, to locate and document undisturbed (in situ) cultural features (flint concentrations). In order to capture the stratigraphic situation in the vicinity of the planned research excavations and to locate the cultural layer with the flint materials linked to the Late Palaeolithic surveys were conducted by means of drillings. The following specialist examinations and consultations were carried out: geological and geomorphological documentation; analyzes of the geographical environment and pedostratigraphy of the research area; from selected profiles soil samples were taken for TL and OSL method analyses. Against the background of other well-known sites with tanged points in northern Poland, the area under study stands out both in terms of the number of flint products obtained and the documented flint concentrations. It must be emphasized that the context of new flint concentrations discovered in Brzoza in the years 2015–2018 is different than that of earlier investigations. Flint products were discovered in a preserved planigraphic and stratigraphic layout; not on a secondary deposit, as was the case, among others in the 1970s. New concentrations discovered in 2015–2018 are related to the Late Palaeolithic technocomplex with tanged points. Amongst flint tools there are elements typologically characteristic to Ahrensburg and Swiderian culture, and individual finds that can be associated with Bromme assemblages. At the present stage of research the acquired flint materials can be linked to the Late Palaeolithic communities present in the area presumably in the younger Dryas. Brzoza site complex occupies an important place in the research of the Late Palaeolithic of northern Poland.