Wyniki wyszukiwania

1

Environmental factors shaping ungulate abundances in Poland

100%

Borowik T., Cornulier T., Jedrzejewska B.

Acta Theriologica

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2013

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tom 58

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nr 4

Population densities of large herbivores are determined by the diverse effects of density-dependent and independent environmental factors. In this study, we used the official 1998–2003 inventory data on ungulate numbers from 462 forest districts and 23 national parks across Poland to determine the roles of various environmental factors in shaping country-wide spatial patterns of ungulate abundances. Spatially explicit generalized additive mixed models showed that different sets of environmental variables explained 39 to 50 % of the variation in red deer Cervus elaphus, wild boar Sus scrofa, and roe deer Capreolus capreolus abundances. For all of the studied species, low forest cover and the mean January temperature were the most important factors limiting their numbers. Woodland cover above 40–50 % held the highest densities for these species. Wild boar and roe deer were more numerous in deciduous or mixed woodlands within a matrix of arable land. Furthermore, we found significant positive effects of marshes and water bodies on wild boar abundances. A juxtaposition of obtained results with ongoing environmental changes (global warming, increase in forest cover) may indicate future growth in ungulate distributions and numbers.

2

Effect of ethanol on lipid bilayer relaxation kinetics

100%

Przybylo M., Borowik T., Kraszewski S., Langner M.

Cellular and Molecular Biology Letters

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2005

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tom 10

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nr Suppl.

3

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Influence of management and biological factors on the spread of parasitic infection in the wild - a case of blood sucking nematode Ashworthius sidemi invasion in European bison (Bison bonasus) in the Bialowieza Primeval Forest, Poland

88%

Kolodziej-Sobocinska M., Demiaszkiewicz A. W., Lachowicz J., Borowik T., Kowalczyk R.

Annals of Parasitology

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2016

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tom 62

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nr Suppl.

4

Analyses of least cost paths for determining effects of habitat types on landscape permeability: wolves in Poland

76%

Huck M., Jedrzejewski W., Borowik T., Jedrzejewska B., Nowak S., Myslajek R. W.

Acta Theriologica

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2011

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tom 56

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nr 1

Determining ecological corridors is crucial for conservation efforts in fragmented habitats. Commonly employed least cost path (LCP) analysis relies on the underlying cost matrix. By using Ecological Niche Factor Analysis, we minimized the problems connected with subjective cost assessment or the use of presence/absence data. We used data on the wolf presence/absence in Poland to identify LCPs connecting patches of suitable wolf habitat, factors that influence patch occupancy, and compare LCPs between different genetic subpopulations. We found that a lower proportion of cities and roads surrounds the most densely populated patches. Least cost paths between areas where little dispersal takes place (i.e., leading to unpopulated patches or between different genetic subpopulations) ran through a higher proportion of roads and human settlements. They also crossed larger maximal distances over deforested areas. We propose that, apart from supplying the basis for direct conservation efforts, LCPs can be used to determine what factors might facilitate or hinder dispersal by comparing different subsets of LCPs. The methods employed can be widely applicable to gain more in-depth information on potential dispersal barriers for large carnivores.

5

The effect of the lipid-binding site of the ankyrin-binding domain of erythroid beta-spectrin on the properties of natural membranes and skeletal structures

64%

Chorzalska A., Lach A., Borowik T., Wolny M., Hryniewicz-Jankowska A., Kolondra A., Langner M., Sikorski A. F.

Cellular and Molecular Biology Letters

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2010

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tom 15

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nr 3

406-423

It was previously shown that the beta-spectrin ankyrin-binding domain binds lipid domains rich in PE in an ankyrin-dependent manner, and that its N-terminal sequence is crucial in interactions with phospholipids. In this study, the effect of the full-length ankyrin-binding domain of β-spectrin on natural erythrocyte and HeLa cell membranes was tested. It was found that, when encapsulated in resealed erythrocyte ghosts, the protein representing the full-length ankyrin-binding domain strongly affected the shape and barrier properties of the erythrocyte membrane, and induced partial spectrin release from the membrane, while truncated mutants had no effect. As found previously (Bok et al. Cell Biol. Int. 31 (2007) 1482–94), overexpression of the full-length GFP-tagged ankyrin-binding domain aggregated and induced aggregation of endogenous spectrin, but this was not the case with overexpression of proteins truncated at their N-terminus. Here, we show that the aggregation of spectrin was accompanied by the aggregation of integral membrane proteins that are known to be connected to spectrin via ankyrin, i.e. Na+K+ATP-ase, IP3 receptor protein and L1 CAM. By contrast, the morphology of the actin cytoskeleton remained unchanged and aggregation of cadherin E or N did not occur upon the overexpression of either full-length or truncated ankyrin-binding domain proteins. The obtained results indicate a substantial role of the lipid-binding part of the β-spectrin ankyrin-binding domain in the determination of the membrane and spectrin-based skeleton functional properties.

6

Habitat suitability, corridors and dispersal barriers for large carnivores in Poland

64%

Huck M., Jedrzejewski W., Borowik T., Milosz-Cielma M., Schmidt K., Jedrzejewska B., Nowak S., Myslajek R. W.

Acta Theriologica

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2010

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tom 55

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nr 2

177-192

Carnivores are often particularly sensitive to landscape fragmentation. Ecological corridors may help to connect local populations, ensuring gene flow and retaining viable meta-populations. We aimed to establish habitat suitability models for two large carnivores in Poland, the grey wolf Canis lupus Linnaeus, 1758 and the Eurasian lynx Lynx lynx Linnaeus, 1758, based on ecological niche factor analysis (ENFA). Secondly, we calculated least cost paths (LCPs) based on cost values obtained from ENFA. Thirdly, we determined structures that might act as barriers, thus diminishing the value of the corridor unless appropriate conservation measures are taken. We compared some of the results with actual dispersal data of four lynx in eastern Poland. Results indicate that both species are highly marginalised. Less habitat that is currently available in Poland is suitable for lynx than for wolves. We determined a total of 76 LCPs. Comparison of these theoretical corridors with actual dispersal routes suggests that the traits of calculated LCPs are mostly within the range of those of real routes. We highlight a variety of features that might act as barriers, such as major roads (including planned highways), urbanized areas, and large un-forested areas. We give suggestions where concerted conservation efforts (eg wildlife passages) might be particularly well-directed.

7

Molecular biogeography of red deer Cervus elaphus from eastern Europe: insights from mitochondrial DNA sequences

52%

Niedzialkowska M., Jedrzejewska B., Honnen A.-C., Otto T., Sidorovich V. E., Perzanowski K., Skog A., Hartl G. B., Borowik T., Bunevich A. N., Lang J., Zachos F. E.

Acta Theriologica

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2011

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tom 56

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nr 1

European red deer are known to show a conspicuous phylogeographic pattern with three distinct mtDNA lineages (western, eastern and North-African/Sardinian). The western lineage, believed to be indicative of a southwestern glacial refuge in Iberia and southern France, nowadays covers large areas of the continent including the British Isles, Scandinavia and parts of central Europe, while the eastern lineage is primarily found in southeast-central Europe, the Carpathians and the Balkans. However, large parts of central Europe and the whole northeast of the continent were not covered by previous analyses. To close this gap, we produced mtDNA control region sequences from more than 500 red deer from Denmark, Germany, Poland, Lithuania, Belarus, Ukraine and western Russia and combined our data with sequences available from earlier studies to an overall sample size of almost 1,100. Our results show that the western lineage extends far into the European east and is prominent in all eastern countries except for the Polish Carpathians, Ukraine and Russia where only eastern haplotypes occurred. While the latter may actually reflect the natural northward expansion of the eastern lineage after the last ice age, the present distribution of the western lineage in eastern Europe may in large parts be artificial and a result of translocations and reintroduction of red deer into areas where the species became extinct in historical times.

Ograniczanie wyników

Environmental factors shaping ungulate abundances in Poland

Effect of ethanol on lipid bilayer relaxation kinetics

Influence of management and biological factors on the spread of parasitic infection in the wild - a case of blood sucking nematode Ashworthius sidemi invasion in European bison (Bison bonasus) in the Bialowieza Primeval Forest, Poland

Analyses of least cost paths for determining effects of habitat types on landscape permeability: wolves in Poland

The effect of the lipid-binding site of the ankyrin-binding domain of erythroid beta-spectrin on the properties of natural membranes and skeletal structures

Habitat suitability, corridors and dispersal barriers for large carnivores in Poland

Molecular biogeography of red deer Cervus elaphus from eastern Europe: insights from mitochondrial DNA sequences