Dagny Krauze-Gryz

Dagny Krauze-Gryz
Warsaw University of Life Sciences - SGGW | SGGW · Department of Forest Zoology and Game Management

PhD

About

100
Publications
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741
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Publications

Publications (100)
Article
Full-text available
The COVID-19 pandemic, which modified levels of visitor attendance to urban forests and green spaces, provided a unique opportunity to measure the effects of human presence on wild animals and their activity. The aim of our study was to describe how the daily activity pattern of roe deer (i.e. proportion of day- and night-time observations) changed...
Article
1. Cavity-bearing trees are important nesting sites for many birds and mammals but have become rare due to anthropogenic modification of natural environments. Nest boxes are often used to compensate for the loss of these microhabitats. 2. Nest boxes contain amounts of organic debris exploited by a variety of organisms, mainly insects. We studied th...
Article
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Brown hares originated in the open steppe grasslands of Eurasia and have adapted very successfully to a mixed, arable agriculture environment. In the last decades of the 20th century, a decline in brown hare populations has been observed in many European countries. In this study, we documented a long-term (1965–2018) decline in the hare population...
Article
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Looking for an effective method to reduce risk of animal-train collisions, we tested the system of wildlife warning reflectors, a method usually used on roads. The research was conducted in central Poland, along a 2.1 km stretch of the E65 railway line near Warsaw, during eight months, in the years 2010–2011. For six months of a test period, the re...
Article
Full-text available
The method of pellet group count is commonly used for estimating population trends of ungulates; however, in the case of species of similar body size, the misidentification rate can be high. Our aim was to find a metrical threshold between pellet groups of roe deer (native species) and fallow deer (alien species) to be applied during fieldwork. The...
Article
• Cavity-bearing trees are important nesting sites for many birds and mammals but have become rare due to anthropogenic modification of natural environments. Nest boxes are often used to compensate for the loss of these microhabitats. • Nest boxes contain amounts of organic debris exploited by a variety of organisms, mainly insects. We studied the...
Article
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In July 2021 an oxygen deficit occurred in the Biebrza River. Dead fish counting was carried out in the middle part of the river. Along a four kilometre long transect 454 fishes were found. Perch (56.8%) was the dominating species, with chub (10.6%), roach (7%), bream (6.2%) and burbot (5.3%) being less frequent. Overall,15 fish species were fou...
Article
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Linnea borealis L. is a postglacial relict in Poland, where it occurs at the edge of its southern range. It is a moderately heliotropic species, associated with coniferous forests. The aim of this study was to collect, analyse and summarise data on the history of its disappearance in forests complexes near Rogów (central Poland). We reviewed resear...
Article
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Preliminary research conducted in Warsaw in the 1970s and 2000s showed that roe deer (Capreolus capreolus) stayed in forest habitat and avoided anthropogenic areas. Activity and exploration patterns of animals are shaped by indices of anthropogenic disturbances, elevated in large cities. The aims of the study were (1) to compare the presence of roe...
Article
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The red fox is one of the most adaptable carnivores inhabiting cities. The aim of our study was to describe the process of Warsaw colonization by the red fox. We focused on: (1) the fox distribution in Warsaw on the basis of presence-absence data (2005-2012) over a grid of 1 × 1 km 2 , (2) the process of settlement in 29 green areas (study periods...
Article
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We would like to thank the following students of Warsaw University of Life Sciences who were involved in the project and helped with the fieldwork: Wioletta Sitek, Sylwia Rykaczewska, and Kamila Wojciechowska. We would like to thank Peter Lurz and an Anonymous Reviewer for their helpful comments on the manuscript. We would like to thank The Royal Ł...
Article
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The red squirrel typically nests in dreys and tree hollows, but also (when given an opportunity) in large nest boxes. We assessed the occupancy rate of nest boxes by red squirrel and non-target species (120 boxes in the continuous forest, habitat mosaic and urban park, checked annually for eight years). Habitat type explained the variability in the...
Article
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Studies on the contribution of the yellow-necked mouse Apodemus flavicollis and of other vertebrates to the diet of the tawny owl Strix aluco were carried out in Warsaw (central Poland) in the years 1983–2018. The frequency of the yellow-necked mouse in owl pellets increased at the break of the 20th and 21st centuries, particularly in some woodland...
Article
Red squirrels (Sciurus vulgaris) successfully inhabit cities, utilize urban structures and adapt to alternative food sources such as supplemental anthropogenic feeding. Here, we compared two urban populations: one in a busy park and another in an urban forest. The first was expected to be highly influenced by human presence (and food delivered by p...
Article
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Wildlife passages are an important tool to reduce negative effects of transport infrastructure on habitat connectivity and animal population viability. The aim of our study was to evaluate the use of two underpasses by medium-sized mammals. Both underpasses are situated in the area of the Rogów Forests, Central Poland, one of which is located under...
Article
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Food niche overlap statistics are a common way to show competition for food resources in a group of animals. Niche breadths of various species are very variable and their diet composition changes reflecting prey availability. The aim of this study was to evidence the food niche overlap of the whole assemblage of avian predators (eight raptor and ow...
Conference Paper
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Human presence or activities are perceived by animals as those associated with predation risk so activity and exploration patterns of animals should be shaped by indices of anthropogenic disturbances. The high level of human disturbances is noticed in big cities. Therefore, the aim of the study was to determine the occurrence of roe deer in Warsaw...
Article
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We studied beavers’ dietary preferences and the role of several factors (such as plant species, size and anthropopression level) that affect the beavers’ foraging in northern Poland. Woody plants along the river were measured and classified according to species in six 100 m-long transects that were characterized by a diversified human disturbance l...
Article
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A bstract: The aim of the study was to assess species diversity of mammals (other than small rodents) which inhabit Pole Mokotowskie Park in Warsaw. Field study was done in the years 2016–2018, supplemented with the archival data. Standard procedures based on direct observations, snow tracking and detection of any signs of animals (i.e. scats, mole...
Article
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One of the main factors that allow the red squirrel (Sciurus vulgaris) to live in cities may be the availability of supplemental food provided by people. In this article, preferences of red squirrels in relation to supplemental food, how it is handled, and whether change seasonally, is investigated. A cafeteria test was performed, in which squirrel...
Article
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Celem badań było określenie związku (korelacji) pomiędzy głównymi środowiskowymi komponentami terytoriów puszczyków (las, łąki, tereny uprawne, wody, zabudowa itd.) a składem pokarmu sów zbadanym na pod-stawie analizy wypluwek. Badania prowadzono na terenie środkowej Polski (głównie Lasy Rogowskie i Kampinoski Park Narodowy) w latach 2004-2019. Pu...
Article
The total length of railways worldwide exceeds 1 million kilometres and recent railway development directly impacts wildlife because of animal‐train collisions. Few studies, however, have analysed factors driving ungulate‐train collisions. We analysed over 3500 ungulate‐train collisions including roe deer, red deer, wild boar, and moose collected i...
Article
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Our aim was to determine dynamics in a population of tawny owls Strix aluco over 15-year period, in relation to year-to-year variation in environmental conditions. The research was carried out in a habitat mosaic of fields and forest in central Poland, over the 2004−2018 period. Numbers of pairs (territories) were established by the standard playba...
Poster
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Cel badań: Określenie związku pomiędzy składem pokarmu puszczyka a strukturą środowiskową terytoriów. Metody: • analizy wypluwek zebranych w 24 terytoriach puszczyków, łącznie 5200 ofiar kręgowych • założenie, że miejsce gniazdowe stanowi centrum terytorium • analiza struktury środowiskowej terytoriów w dwóch wariantach: 19,6 ha (promień 250 od mie...
Article
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In this study, we focused on a goshawk population in central Poland (study area 105 km2,forests 24 km2, seven small forest complexes) which was monitored long-term (with high densitiesrecorded in the 1980s of 16.3 pairs/100 km2 despite persecution by farmers) to analyse howenvironmental factors (prey availability and changes in the forest structure...
Article
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Common buzzard is the most abundant bird of prey in Europe, and its population has undergone serious changes. In this study, we focused on a population in Central Poland (study area 105 km 2 , forests around 24 km 2 , seven forest complexes) to analyze how certain environmental factors influenced population abundance, breeding parameters, and diet...
Article
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Habitat fragmentation affects bat assemblages living in forests by changing species composition, species richness and population densities. The aim of this paper was to determine the structure of bat assemblages in fragmented forests of central Poland (Experimental Forest Station SGGW in Rogów) based on data concerning bat fauna of this area. Our w...
Article
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Long-term monitoring of raptor populations can serve as a proxy for the evaluation of whole ecosystem health. The aim of the study was to compare the current abundance of the sparrowhawk Accipiter nisus L. with data from past decades. Additionally, we examined the diet of this species in the breeding season and recorded the number of fledglings. Th...
Article
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Carrion plays a crucial role in the raven’s diet. In the past, domestic pig carrion was widely available in Poland. This changed with an African swine fever (ASF) outbreak and the introduction of strict procedures aimed at stopping the virus from spreading. We compared data from Central Poland (field and forest mosaic, study area of 105 km2) for tw...
Article
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The aim of this study was to describe how the diet of tawny owl changed along an urbanisation gradient. The research was conducted from 2003 to 2011 in central Poland. Pellets were collected in the following zones: the center of Warsaw, capital city of Poland (inhabited by approximately 2 million people), its outskirts and rural areas beyond the ci...
Article
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We estimated the predation rate by free ranging domestic cats on vertebrates in rural areas of central Poland. We performed a door-to-door survey on the number of cats owned and type of food provided and combined results of the survey with the previous data on cats’ diet composition, estimated with different methods (prey-brought-home and prey-eate...
Article
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Gryz J., Krauze−Gryz D. 2018. Struktura płci i przyrost populacji jelenia Cervus elaphus w Puszczy Białowieskiej-porównanie dwóch metod oceny. Sylwan 162 (11): 965−968. Data on sex structure and growth of the population is crucial for proper game management. Camera traps, which are of reasonably low cost, but very efficient, can potentially measur...
Article
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The degree of penetration of urban habitats by small ground-dwelling mammals was studied in Warsaw agglomeration and in adjacent areas up to 50 km from the city centre. Study material consisted of pellets of the tawny owl Strix aluco collected in 85 sites, which contained 15,152 remains of individuals of small mammals. The species that penetrated c...
Article
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key words tawny owls Strix aluco onset of laying eggs number of fledglings urban heat island artificial light prey availability ABSTRACT An increasing urbanization of habitats in which birds live influences their populations by modifying behaviour, dietary composition , causes of mortality and variables related to breeding. This study aimed to comp...
Article
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The aim of the study was to describe the species diversity of small mammals in the western part of the Skierniewice Forest District (Central Poland) using tawny owl ( Strix aluco ) pellets. The landscape itself is a field and forest mosaic with small forest complexes. Four forest complexes with an area between 70 and 750 ha and surrounded by arable...
Article
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The development and modernization of railway infrastructures in many countries has increased the frequency of wildlife-train collisions. Our objective was to describe the temporal pattern of train accidents related to wild ungulates (i.e., roe deer [Capreolus capreolus], red deer [Cervus elaphus], moose [Alces alces], and wild boar [Sus scrofa]) to...
Presentation
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Stone marten might be a pest in urban areas, which transfers zoonoses and parasites, and causes material losses (damaged cars or ruined attics), but for wildlife lovers it is a valuable component of urban biodiversity. When it is common, human-marten conflict management may be necessary. Our aim was to determine which habitat stone marten penetrate...
Article
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Understanding how biodiversity, ecosystem function and species conservation are affected by factors such as climate or land use change, disease and pollution is an important aspect of species conservation and a key focus of the field of Conservation Medicine. Mammals such as squirrels can be valuable biological sentinels for environmental pollution...
Article
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The threat that domestic cats pose to wildlife has gained increased recognition by researchers and conservationists, and in this study, we investigated the seasonal variability and the effects of environment type (rural vs. urban) on the prey composition of free-ranging house cats in Poland. We analysed the variability in 307 monthly prey samples o...
Article
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Abundance of red fox (Vulpes vulpes) populations in Poland and Europe have increased in the past decades, especially in the areas of high anthropogenic transformation. The aim of this study was to assess the current density of red fox in natural forests and to analyse changes in its abundance since 1981. The fieldwork was carried out in Polish part...
Article
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The aim of the study was to determine the species richness (S, Chao- 1 index) and diversity (Shannon-Wiener H’ index, diversity profiles) of small mammal assemblages in woodland reserves in an urban agglomeration and to compare the similarity of assemblages (with the use of Ward’s method) in terms of proportions of small mammals connected to the ha...
Article
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The paper presents distribution of the European water vole Arvicola amphibius (Linnaeus, 1758) in Mazowsze and southern Podlasie in areas situated within a 120-kilometer radius from Warsaw. Data published so far and unpublished results from analyses of the diet of three common species of owls were set up. The rodent is rare in the study area, espec...
Article
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Abstract: The diet of three owl species was analysed in 32 sites localised in the Masovian Landscape Park and its outskirts to determine the structure of small mammal communities. Study was done in the years 1993–2016, 5,728 vertebrate prey (including 4,001 mammals) were collected. Five species of soricomorphs, six bats, 14 rodents and one species...
Article
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Kręgowce w pokarmie puszczyka Strix aluco na terenie kompleksu leśnego Lipce (Nadleśnictwo Rogów) Gryz J., Krauze-Gryz D. 2016. Vertebrates in the diet of tawny owl Strix aluco in Lipce Forest (Rogów Forest District). Parki nar. Rez. Przyr. 35(3): 89 – 96. Abstract: The research was carried out in the years 2013 – 2016 in the area of a Lipce forest...
Article
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The aim of the study was to combine and summarize data on rare species of breeding forest birds found in the area of the Experimental Forest District near the Rogów village (Łódź Province). Our study area comprised 230 km2 of field and forest mosaic, where forests accounted for almost 17% of the area (13 forest complexes of 35-1000 ha). The results...
Poster
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Increased speed of trains coupled with higher density of ungulates, results in an increased risk of train derail after collision with large mammals, i.e. moose. Therefore, the aim of this study was to show when the risk of collision is highest. We used data on train-animal collisions from the years 2012-2013 in the whole Poland (made available by P...
Poster
Full-text available
Looking for an effective method to reduce risk of animal-train collisions we tested the system of wildlife warning reflectors, usually used on roads. The research was conducted in central Poland along the E 65 line between Warszawa Wschodnia and Legionowo in the years 2010 – 2011. Digital cameras were used to register animal activity 24h a day in t...
Article
Full-text available
The aim of the study was to characterize the diet composition of tawny owl in relation to environmental variables: season and availability of small rodents. Study area was located in central Poland, in Łódź voivodship, in the area of Rogów Forest District. It comprised of a mosaic of forests and arable lands. The study was done in the years 2003-20...
Chapter
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W trakcie badań prowadzonych w latach 2012-2015 zebrano informacje o 18 ga-tunkach ssaków na terenie Parku Skaryszewskiego: jeżu wschodnim Erinaceus concolor, krecie Talpa europaea, pięciu gatunkach nietoperzy Chiroptera, siedmiu gryzoni Rodentia i czterech drapieżnych Carnivora Większość z tych ssaków jest objęta ochroną ścisłą lub częściową, pięć...
Article
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The diet composition of long-eared owls in central Poland was studied in the years 2004-2010 using standard procedures entailing the analysis of pellets. A total of 2111 prey items were identified in the material analysed, and voles (Microtus spp.) were found to dominate in both the summer (April-September) and winter (October-March) seasons. Never...
Article
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Abstrakt Rozpoczęty w latach 70. i kontynuowany do dnia dzisiejszego monitoring pta-ków szponiastych na terenie Nadleśnictwa Rogów pozwala śledzić trendy liczeb-ności wybranych gatunków. Ostatnia całościowa inwentaryzacja przeprowadzona w latach 2001-2003 ujawniła znaczne zmiany liczebności myszołowa, jastrzębia i kruka. O ile wzrost zagęszczenia m...
Article
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The Eurasian red squirrel (Sciurus vulgaris) has a wide range and inhabits various habitats, both primeval and human-transformed (i.e. city parks). Its diet consists of numerous items, including plants, fungi and animal matter. It can be considered a generalist species, but conifer and broadleaf seeds dominate its diet. In coniferous habitats, coni...
Article
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Notatki florystyczne, faunistyczne i mykobiotyczne 97 JAKUB GRYZ, DAGNY KRAUZE-GRYZ Pierwsze stwierdzenie szopa pracza Procyon lotor na terenie Nadleśnictwa Rogów GRYZ J., KRAUZE-GRYZ D. 2015. First record of the racoon in Rogów Forest District. Par. nar. Rez. Przyr. 34(4): 97 – 98. ABSTRACT: On 17.06.2015, a raccoon (1 ind.) was observed in a fore...
Article
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The aim of this study was to assess the density and diet composition of freeranging dogs in Poland. The study was conducted in a field and forest mosaic in the central part of the country in the years 2005–2011. The density of the free-ranging dogs was assessed during night counts along repeated transect routes. The number of dogs seen and the feas...
Article
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Modernization of railways in Poland should ensure not only safety of passengers, but also limit their negative impact on the environment, especially possibility of train collisions with animals. The aim of the study conducted in the years 2007-2013 on the E20 railway Minsk Mazowiecki-Siedlce were (1) to record places where animals cross the railway...
Article
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Analyses of tawny owl pellets from two locations (Rogów, Kołacin) in the Landscape-Nature Protected Complex ''Mroga Valley'' (Łódź province) revealed the presence of 14 species of small ground-dwelling mammals. Most of them represent common species inhabiting a mosaic landscape containing forests, open fields, water and built-up areas. Relatively v...
Article
Full-text available
Analyses of tawny owl pellets from two locations (Rogów, Kołacin) in the Landscape-Nature Protected Complex ‘‘Mroga Valley’’ (Łódź province) revealed the presence of 14 species of small ground-dwelling mammals. Most of them represent common species inhabiting a mosaic landscape containing forests, open fields, water and built-up areas. Relatively v...
Article
2014. Urządzenia akustyczne UOZ−1 sposobem na ograniczenie kolizji z udziałem zwierząt na liniach kolejowych. Sylwan 158 (2): 143−150. Modernization of railways in Poland should ensure not only safety of passengers, but also limit their negative impact on the environment, especially possibility of train collisions with animals. The aim of the study...
Article
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2013. Występowanie sów Strigiformes na terenie Leśnego Zakładu Doświadczalnego SGGW w Rogowie (środkowa Polska). Sylwan 157 (9): 695−702. Presence of four owl species was confirmed in the area of Forest Experimental Station of WULS−SGGW in Rogów (central Poland) at the beginning of the 2000s. These were tawny owl, long−eared owl, little owl and bar...
Article
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Presence of four owl species was confirmed in the area of Forest Experimental Station of WULS-SGGW in Rogów (central Poland) at the beginning of the 2000s. These were tawny owl, long-eared owl, little owl and barn owl. In the second half of the XX century migratory short-eared owls had also been recorded. Density of tawny owl territories per total...