Wyniki wyszukiwania

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Centropyxis moldavica sp.n. (Rhizopoda, Testacea), eine neue art der Bodentestaceen aus der Tschechoslowakei

100%

Balik V.

Acta Protozoologica

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1988

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tom 27

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nr 2

2

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Preliminary biometric characteristics of Greyster dogs

100%

Frackowiak H., Brylewski M., Pedzinska-Kijak K., Zdun M.

Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego

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2021

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tom 17

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nr 2

3

Preliminary biometric characteristics of Border Collies and their dependence on sport activity

88%

Frackowiak H., Kiryk E., Graczyk S., Zdun M.

Roczniki Naukowe Polskiego Towarzystwa Zootechnicznego

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2021

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tom 17

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nr 4

4

Euploide ciliates in sea ice of the Weddell Sea (Antarctica)

75%

Agatha S., Wilbert N., Spindler M., Elbrachter M.

Acta Protozoologica

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1990

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tom 29

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nr 3

5

The biometric characteristic of the Tufted Duck Aythya fuligula (Linnaeus, 1758) from Western Pomerania (Poland)

75%

Krolaczyk K., Dzierzba E., Kavetska K. M., Zaborski D.

Acta Scientiarum Polonorum. Zootechnica

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2022

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tom 21

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nr 3

6

Timing of autumn migration and biometric characteristics of migrating populations of European Robin (Erithacus rubecula L., 1958) in North-Eastern Poland

63%

Polakowski M., Jankowiak L.

Polish Journal of Ecology

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2012

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tom 60

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nr 4

We studied the autumn migration of the European robin (Erithacus rubecula) through north-eastern Poland. During the study period 2002–2004 we analysed a total of 2375 individuals: 1991 first-year birds and 349 adults. First-year birds had shorter wings than adults. Body condition was influenced by age, year of migration fat content and arrival time. Our results show that first-year birds arrived earlier, had low-fat levels and were in a comparatively poorer body condition to that of the adults and were less effective foragers. Stopover length decreased during the migration season for both age groups as a result of rush to their wintering areas because of winter approach. We found that adult females arrived later than adult males.

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Biometric characterisation of selected seed stands of Picea abies (L.) Karst. of Istebna

51%

Orzel S., Forgiel M.

Dendrobiology

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2004

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tom 51 Supplement

The paper assesses the growth of nine seed stands of Picea abies (L.) Karst. of Istebna. The stands were selected on the basis of the dynamic height growth and good adaptation of their progeny under different site conditions. The d.b.h. increment of trees during the entire lifespan of stands is analysed in detail, especially its magnitude and dynamics during the last twenty years, i.e. from 1982 to 2001.

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Morphological and genetic diversity of Isopyrum thalictroides L. (Ranunculaceae) populations of isolated forest fragments of different sizes in East Central Poland

51%

Skrajna T., Kubicka H., Lugowska M.

Polish Journal of Ecology

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2015

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tom 63

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nr 1

Isopyrum thalictroides is classified as an indicator species of the so-called ‘old-growth forests’. It occurs in shady deciduous forests and is a characteristic species of the order Fagetalia silvaticae. In many parts of Europe and Poland, it is classified in Red Lists of endangered species with different threat levels. Studies of an occurrence of I. thalictroides were carried out in the years 2000–2002 and 2010–2012 to examine changes in the abundance and morphological and genetic diversity of populations inhabiting small mid-field forest fragments (populations 2–4) and a compact forest (1 population), all located in east central Poland. Isopyrum thalictroides cover declined drastically at all isolated sites (from 83 to 93%) whereas the whole species diversity of these phytocenoses increased. By contrast, in the compact forest both, the area occupied by I. thalictroides population and the total community composition only slightly changed over time. When I. thalictroides plants sampled from all studied sites were compared in terms of the biometrical characteristics, populations 3 and 4 were found to be most similar, population 1 was less similar and population 2 was the most different of all populations, probably due to strong anthropogenic pressure. Electrophoretic analysis of seed and leaf storage proteins of Isopyrum thalictroides obtained from the four sites demonstrated that the populations were quite similar genetically, no matter how distant they were from each another. Population 2 was the most diverse, followed by population 1 whereas populations 3 and 4 were the most similar. A decreasing genetic distance in the I. thalictroides population would lead to inbreeding as seed setting by the plants will be poorer and the seeds will be less viable, which will result in a lower number of plants per a given area. The decreased gene pool indicates that the population of I. thalictroides is threatened with extinction in this area. Therefore, it is warranted to undertake some conservation measures to protect the species; hence the need arises to monitor it.

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Biometryczna charakterystyka drzewostanow swierkowych Beskidu Slaskiego na przykladzie lasow poludniowej czesci masywu Skrzyczne

45%

Orzel S., Wronowski J.

Acta Agraria et Silvestria. Series Silvestris

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1992

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tom 30

31-42

It was found on the basis of measurements of material taken in 21 sample plots, established in spruce forests of age classcs IV and V (Table 1), that: 1. The altitude of the stand above sea level decisively affected the formation of valuation traits. Their values (Tables 1 and 2) and (he index of dynamics of diameter increment (Table 4) suggest that the best conditions of growth and development of spruce are found at the altitude of about 900 m. 2. The increment in diameter decreased with the age of stands and also with the altitude, i.e., with the worsening of habitat conditions (Table 3, Fig. 1). 3. The variation in diameter increment increased with the age of stands and decreased with the altitude above sea level (Table 3, Fig.2). This regularity did not concern the other traits (d, h and v) which showed the least variation in stands at 900 m, a greater one at 1100 m, and the greatest variation at 700 m (Table 2).

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