Andreja Radović

Ruđer Bošković Institute | RBI

Ornithological data, in comparison to data for other biological groups, is often regarded as one that is most easily obtainable and birds are among best known organisms. Additionally, birds are indicators of environmental changes and good surrogate for ecological value of an area. For that reason, in Europe, data on birds and habitats are used as m...

Question What are the woody vegetation encroachment patterns after agricultural land abandonment? Focusing on two parameters, woody plant species richness and vertical vegetation heterogeneity (number of different vegetation strata and their relative cover), we investigated: i) the effect of forest encroachment following land abandonment, ii) the c...

Very frequently biological databases are used for analysing distribution of different taxa. These databases are usually the result of variable sampling effort and location uncertainty. The aim of this study was to test the influence of geographically biased sampling effort and spatial uncertainty of locations on models of species richness. For this...

Understanding land abandonment and the resulting changes in land cover provides data for suitable reaction to habitat and species losses this process brings. This study aimed to define land-cover types and their biodiversity, record spatio-temporal changes and detect the trajectories and magnitude of these changes. The study was conducted on the is...

Species-specific differences in dynamics of agonistic interactions may influence the outcome of interspecific competition and potentially contribute to competitive advantage of one species over another. In this study, we compared the dynamics of agonistic interactions of one of the most successful crayfish invaders of European freshwater ecosystems...

Agricultural land abandonment is recognized as a major environmental threat in Europe, being particularly pronounced in south-eastern Europe, where knowledge on its effects is limited. Taking the Balkan Peninsula as a case study, we investigated agricultural abandonment impact on passerine communities at regional level. We set up a standard methodo...

Lowland riverine floodplains are among the most dynamic and heterogeneous of ecosystems, but many have been extensively modified. Their provision of important habitats provides a key motivation for restoring natural flow regimes (in terms of magnitude, frequency, duration, timing and rate of change of hydrological conditions). Despite general recog...

Capsule Spatial environmental modelling well predicted nesting distribution of the White stork in Southeast Europe and can be used in conservation planning with respect to climate change. Aims To create spatial models for predicting White Stork presence and densities in the Southeast Europe to identify areas of suitable habitat for White Storks. Me...

An important factor in the evolution of reproductive strategies in birds is the loss of a clutch or a brood. Many avian species produce a replacement clutch following the loss of the first clutch, but additional breeding effort carries physiological costs and can also reduce female fitness. Thus, egg production in replacement clutches is usually re...

Land abandonment is a widespread phenomenon in agricultural systems, especially in former communist countries of Eastern and South-eastern Europe. Moreover, Croatia was affected by acts of war which enhanced the depopulation of marginal areas impelling further land abandonment. Agricultural landscapes in Croatia are highly parcelled with various pr...

Western Capercille (Tetrao urogallus) is bird species with wast distribution across western hemisphere but unsatisfactory conservation status in Croatia. During last century significant decline of population occured. Croatian Book of Birds of Croatia classified status of the national population as endangered. We tried to reconstruct main driving fo...

The abandonment of less productive agricultural land on the one hand and intensification and concentration of parcels on the other are the main characteristics of the Common Agricultural Policy (CAP) that Croatia is going to enforce when entering the EU. Due to demographic changes and the economic transition in Croatia as a consequence of war activ...

In our study we investigated the effect of agricultural land abandonment on the struc- ture of passerine bird communities in the Balkans. We randomly selected an equal number of 1 km 2 study sites for each of four succession stages (with cover of woody vegetation: 0–25%, 25–50%, 50–75% and 75–100%, respectively) in four countries (20 for Bulgaria,...

During the last few decades vegetation changes, especially vegetation succession of open habitats, became a common process on large areas in Croatia. Many plant communities arose and are maintained by some form of agricultural activities (mowing, pasture, cutting, burning etc.). Abandoning such traditional land management practice lead to vegetatio...

A unified bird checklist has been created for the area of Sisačka Posavina. The list summarises the occurrence of a total of 246 species between 1881 and 1998. The list mostly refers to species recorded in Lonjsko Polje Nature Park and the wider geographical area of Lonjsko Polje. Data from recorded published and unpublished papers during the perio...

Agricultural land abandonment is one of the main drivers of land use change, leading to various responses of farmland ecological communities. In an effort to better understand the effect of agricultural land abandonment on passerine bird communities, we sampled 20 randomly selected sites [1 km x 1 km] in remote Greek mountains, reflecting an abando...

The paper describes impacts of the main ecological factors on the development of horse fly populations in the alluvial floodplains of the Danube River in the Pannonian plain. The study has been conducted from 2004-2009 in the four, water dependent, succession stages of alluvial forest communities of Kopacki rit wetlands. In total more than 23 000 a...

The breeding population of Spoonbill Platalea leucorodia in Croatia, estimated at 154-275 breeding pairs, is classified as Endangered. The main reason for the unfavourable status is loss of breeding/feeding habitats. The purpose of the study was to detect changes in the habitat types previously assessed as important for Spoonbill’s feeding. The stu...

The authors researched changes in specific habitat types in areas considered to be the most important in Croatia for protection of endangered bird fauna during the period 1990–2000. The analysis focused on four areas in the continental part of Croatia (Danube and Drava River alluvium, Pokupsko depression, Sava River basin, Upper Drava River basin)...

Changes in habitat suitable for breeding of two sympatric raptor species (Haliaeetus albicilla and Aquila pomarina) were analysed along one of the most important breeding sites in Croatia for both species. The habitat suitability modelling was used to assess the influence of forestry practice during 2000-2006 using the known data on nesting places...

Background and Purpose: No previous field investigations have been conducted on the biology and ecology of the native population of golden jackals (Canis aureus L.) from Dalmatia. The object of this study was to determine the feeding habits of this poorly studied population. Materials and Methods: The diet composition of golden jackals from Dalmati...

A computational framework to map species’ distributions (realized density) using occurrence-only data and environmental predictors is presented and illustrated using a textbook example and two case studies: distribution of root vole (Microtes oeconomus) in the Netherlands, and distribution of white-tailed eagle nests (Haliaeetus albicilla) in Croat...

The purpose of this study was to find out whether a set of habitat characteristics, derived from the National Corine Land Cover (CLC) database of habitat types, could indicate the occurrence of white stork nests in a settlement. The analyses were performed for the settlements closer than 35 km from the Drava River (northern Croatia). Sixteen habita...

From 2003–2006, research on the breeding distribution of the white-tailed eagle (Haliaeetus albicilla) was conducted in Croatia in order to assess the size of the national population. In 125 locations, clear signs of breeding activity were found. An additional 10 presumably active territories were detected but it was not possible to locate the exac...

According to known population parameters, we used software Vortex for simulating long-term population dynamics of white tailed eagles (Haliaeetus albicilla L.) on fourteen management options. The main purpose of the study was the assessment of the dispersion rate detection importance (integrating effects of persecution and permanent dispersion) for...

Authors compared bird communities living in five mountain areas in the northern Croatia (Risnjak, Papuk, Medvednica. Ivanscica and Cesargrad mountain) using multivariate explorative techniques of qualitative and quantitative historical data. Similarity matrices were prepared based on Bray-Courtis similarity among samples. Non-metric multidimensiona...