Habitat factors associated with the decline in brown hare abundance in Poland in the beginning of the 21st century

2018 ◽  
Vol 85 ◽  
pp. 915-920
Author(s):  
Marek Panek
2009 ◽  
Vol 13 (1) ◽  
pp. 23-35 ◽  
Author(s):  
Heidi Falkenbach

The Finnish commercial property market internationalised rapidly in the beginning of the 21st century. According to the portfolio theory and previous research on international property investments, the main motivation factor driving international real estate investments is the possibility to reach diversification benefits. The paper discusses the diversification benefits offered by the Finnish property market in its early years of internationalisation. As international real estate investors in the Finnish property market include investors with both real estate only, as well as mixed‐asset portfolios, the diversification benefits are studied both in terms of a Finnish mixed-asset portfolio, as well as international real estate portfolio. Santruka XXI a. pradžioje Suomijos komercinio nekilnojamojo turto rinkoje sparčiai vyko tarptautiniai procesai. Remiantis portfelio teorija ir ankstesniais tyrimais apie tarptautines investicijas i nekilnojamaji turta, pag rindinis veiksnys, kuris skatina tarptautines nekilnojamojo turto investicijas ‐ tai galimybe gauti diversifi kacijos teikiama nauda. Darbe aptariama, kokia nauda siūle Suomijos nekilnojamojo turto rinka ankstyvaisiais internacionalizacijos metais. Kadangi kai kurie Suomijos nekilnojamojo turto rinkoje veikiantys tarptautiniai nekilnojamojo turto investuotojai užsiima tik nekilnojamuoju turtu, o yra ir tokiu, kurie turi mišraus turto portfelius, diversifi kacijos nauda nagrinejama ir pagal Suomijos mišraus turto portfeli, ir pagal tarptautini nekilnojamojo turto portfeli.


Stroke ◽  
2008 ◽  
Vol 39 (1) ◽  
pp. 10-15 ◽  
Author(s):  
Björn Hallström ◽  
Ann-Cathrin Jönsson ◽  
Christina Nerbrand ◽  
Bo Norrving ◽  
Arne Lindgren

2021 ◽  
Vol 25 (4) ◽  
pp. 1-9
Author(s):  
Pavol Eliáš

Invasion ecology was established as a science of invasion of animals and plants in the beginning of the second half of the 20th century by English ecologist Charles Sutherland Elton (1900-1991). Rapid development of the field of ecology is evident since the end of last century and following decades of 21st century. The paper deals with current development, diversity of concepts and hypotheses, including critiques of invasion terminology, invasion species concepts, introduced species as bad species and xenophobe appeared related to aliens as invaders. Invasion biology was an attempt to integrate alien animals and plants research into one science. In last decade new science of invasions is developed, characterised by multi- and interdisicplinarity, supported by social and economy sciences. To facilitate generalisations, and to improve the link between science, policy, and management, numerous frameworks have been developed in an attempt to unify different concepts and definitions.


Author(s):  
Agnieszka Szlauer-Łukaszewska ◽  
Vladimir Pešić

We analysed the occurrence of ostracods in a small river, taking into account all the types of water bodies in the floodplain − these included helocrenes, oxbow lakes, and ponds, as well as the main river channel. The objective of the study was to investigate the variation in ostracod communities and identify those factors determining species distribution. The environmental factors considered were the type of water body, responsible for 17% of the variance, the physical and chemical water properties (29%), and the biotic and abiotic factors associated with the substrate type (23%). Among the factors associated with the substrate, sediment sorting, plant coverage and insolation were the most important. The ostracod fauna of the helocrenes differed from that of the other water bodies in the floodplain. In the water bodies of the Krąpiel valley and in the main river channel, 33 ostracod species were recorded, of which 26 were found in the main river channel. Refugia in the floodplain were the main source of the diversity and abundance of ostracods in the main river channel. The mean density in the main river channel was very low, at 330 indiv. m−2, while in the water bodies of the floodplain it was the greatest, reaching up to 5568 indiv. m−2.


2019 ◽  
Vol 168 (1) ◽  
pp. 28-40 ◽  
Author(s):  
Sahadatou Mama Sambo ◽  
Delano Ronald Togbé ◽  
Antonio A.C. Sinzogan ◽  
Aristide Adomou ◽  
Hippolyte Aimé Bokonon‐Ganta ◽  
...  

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