Wyniki wyszukiwania - AGRO

1

The vertical distribution of Collembola in an agricultural landscape

100%

Filser J., Fromm H.

Polskie Pismo Entomologiczne

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1995

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tom 64

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nr 1-4

2

Notes on the owls of the Polish Tatra Mountains, Southern Poland

100%

Cichocki W., Slizowski J., Bochenski Z. M.

Acta Zoologica Cracoviensia

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2004

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tom 47

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nr 1-2

Qualitative observations of owls were carried out in the Polish Tatra Mts, S Poland in the years 1998-2003. The following six species were recorded: Eagle Owl, Tawny Owl, Ural Owl, Pygmy Owl, Tengmalm’s Owl and Long-eared Owl. The distribution of particular owl species in the Tatra Mts is clearly associated with changes in the habitat according to the altitude. Records of the Tawny Owl predominate in the lower montane zone, those of Tengmalm’s Owl in the upper montane zone, and of Long-eared Owl at higher altitudes (timberline and above).

3

Analysis of the composition and vertical distribution of the macroalgae in Western part of the Gulf of Gdansk in 1979 and 1980

86%

Plinski M., Florczyk I.

Oceanologia

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1984

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tom 19

4

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The evaluation of soil seed bank in two Arrhenatherion meadow habitats in central Poland

86%

Janicka M.

Acta Scientiarum Polonorum. Agricultura

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2016

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tom 15

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nr 4

Too intensive management by mowing or grazing or cessation of management both lead to the floristic impoverishment of meadow communities. Soil seed bank can play an essential role in the ecological restoration of species-rich semi-natural grasslands. In Poland, little research has been conducted in this area, particularly refers to Arrhenatherion meadows. The aim of the studies was to determine the density and species composition of the soil seed bank of Arrhenatheretum elatioris meadows as well as the distribution of seeds across four soil levels. The studies were carried out in two habitats: Arrhenatheretum elatioris (code 6510-1) and Poa pratensis – Festuca rubra (code 6510-2). Soil samples were collected up to a depth of 20 cm, divided into four levels: 0-5 cm, 5-10 cm, 10-15 cm 15-20 cm. The size and species composition of the seed bank was determined by extracting seeds from the soil samples. The number of diaspores (seeds and fruits) in the topsoil (0-20 cm) layer was 56,430 seeds·mˉ² (Arrhenatheretum elatioris) and 118,510 seeds·mˉ² (Poa pratensis – Festuca rubra). The soil seed banks were dominated by diaspores of annual dicotyledonous species (above 80%) which were mainly seeds of arable weeds or ruderal plants. The assessed soil seed banks were dominated by Chenopodium album and Stellaria media. In both grasslands, the quantity of Poaceae and Fabaceae diaspores were very low. These results confirmed that most mesic grassland species did not form persistent seed banks and reintroduction of target species seeds is necessary in order to restore the species-rich Arrhenatherion elatioris meadows.

5

Comparison of two spectrophotometric methods of chlorophyll “a” determination in the sea water samples

86%

Bekasova O. D., Konovalov B. V., Kosakowska A., Kaczmarek S.

Oceanologia

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1990

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tom 28

6

Spirostomum teres: a long term study of an anoxic-hypolimnion population feeding upon photosynthesizing microorganisms

86%

Macek M., Sanchez Medina X., Picazo A., Pestova D., Bautista Reyes F., Montiel Hernandez J. R., Alcocer J., Merino Ibarra M., Camacho A.

Acta Protozoologica

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2020

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tom 59

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nr 1

7

Remote sensing of vertical phytoplankton pigment distributions in the Baltic: new mathematical expressions. Part 1: Total chlorophyll a distribution

86%

Ostrowska M., Majchrowski R., Ston-Egiert J., Wozniak B., Ficek D., Dera J.

Oceanologia

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2007

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tom 49

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nr 4

This article is the first in a series of three describing the modelling of the vertical different photosynthetic and photoprotecting phytoplankton pigments concentration distributions in the Baltic and their interrelations described by the so-called non-photosynthetic pigment factor. The model formulas yielded by this research are an integral part of the algorithms used in the remote sensing of the Baltic ecosystem. Algorithms of this kind have already been developed by our team from data relating mainly to oceanic Case 1 waters (WC1) and have produced good results for these waters. But their application to Baltic waters, i.e., Case 2 waters, was not so successful. On the basis of empirical data for the Baltic Sea, we therefore derived new mathematical expressions for the spatial distribution of Baltic phytoplankton pigments. They are discussed in this series of articles. This first article presents a statistical model for determining the total concentration of chlorophyll a (i.e., the sum of chlorophylls a+pheo derived spectrophotometrically) at different depths in the Baltic Sea Ca(z) on the basis of its surface concentration Ca(0), which can be determined by remote sensing. This model accounts for the principal features of the vertical distributions of chlorophyll concentrations characteristic of the Baltic Sea. The model’s precision was verified empirically: it was found suitable for application in the efficient monitoring of the Baltic Sea. The modified mathematical descriptions of the concentrations of accessory pigments (photosynthetic and photoprotecting) in Baltic phytoplankton and selected relationships between them are given in the other two articles in this series (Majchrowski et al. 2007, Woźniak et al. 2007b, both in this volume).

8

Vertical variation of phytoplankton structure in the Owinska gravel pit lake in 2004

86%

Szelag-Wasielewska E., Goldyn R.

Oceanological and Hydrobiological Studies

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2005

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tom 34

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nr Suppl.3

9

Remote sensing of vertical phytoplankton pigment distributions in the Baltic: new mathematical expressions. Part 3: Non-phytosynthetic pigment absorption factor

86%

Wozniak B., Majchrowski R., Ostrowska M., Ficek D., Kunicka J., Dera J.

Oceanologia

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2007

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tom 49

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nr 4

This paper, part 3 of the description of vertical pigment distributions in the Baltic Sea, discusses the mathematical expression enabling the vertical distributions of the non-photosynthetic pigment absorption factor fa to be estimated. The factor fa is directly related to concentrations of the several groups of phytoplankton pigments and describes quantitatively the ratio of the light energy absorbed at given depths by photosynthetic pigments to the light energy absorbed by all the phytoplankton pigments together (photosynthetic and photoprotecting). Knowledge of this factor is highly desirable in the construction of state-of-the-art ‘light-photosynthesis’ models for remote-sensing purposes. The expression enables fa to be estimated with considerable precision on the basis of two surface parameters (available from satellite observations): the total chlorophyll a concentration at the surface Ca(0) and the spectral downward irradiance Ed(λ, 0) just below the sea surface. The expression is applicable to Baltic waters from the surface down to an optical depth of τ ≈5. The verification of the model description of fa was based on 400 quasi-empirical values of this factor which were calculated on the basis of empirical values of the following parameters measured at the same depths: Ed(λ, z) (or also PAR(z)), apl(λ, z), and the concentrations of all the groups of phytoplankton pigments Ca(z) and Cj(z) (where j denotes in turn chl b, chl c, PSC, phyc, PPC). The verification shows that the errors in the values of the non-photosynthetic pigment absorption factor fa estimated using the model developed in this work are small: in practice they do not exceed 4%. Besides the mathematical description of the vertical distribution of fa, this paper also discusses the range of variation of its values measured in the Baltic and its dependence on the trophic index of a basin and depth in the sea. In addition, the similarities and differences in the behaviour of fa in Baltic and oceanic basins are compared.

10

Vertical distribution of benthic macrofauna in sandy sediments of the Pomeranian Bay [Southern Baltic]

86%

Maslowski J.

Acta Scientiarum Polonorum. Piscaria

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2004

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tom 03

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nr 1-2

11

The size structure of the Mesodinium rubrum population in the Gdańsk Basin

86%

Rychert K.

Oceanologia

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2004

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tom 46

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nr 3

The ciliate Mesodinium rubrum Lohmann 1908 (= Myrionecta rubra Jankowski 1976) is an important phototrophic organismin the Gdańsk Basin. In June 2002 the vertical distribution and size structure of the M. rubrum population were studied. Its presence was generally observed in the whole water column (one exception was the anoxic near-bottom zone in the Gdańsk Deep) at all stations studied. Maximum abundance (18 300 cells dm−3) was recorded at 26 m depth at the station located in the inner Gulf of Gdańsk. Analysis of the size structure of the counted organisms demonstrated the co-existence of small and large cells of M. rubrum in the upper layer of the water column and a gradual increase with depth of the prevalence of large specimens. This shows that at least two forms of M. rubrum exist in the region studied. Deep migrations are probably undertaken only by relatively large organisms.

12

Nematode fauna of a cultivated peat meadow in relation to soil depth

86%

Ilieva-Makulec K.

Annales Zoologici

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2000

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tom 50

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nr 2

Vertical distribution of nematodes down to a depth of 50 cm was studied in a peat, meadow soil in north-eastern part of Poland. The abundance and generic composition of nematode fauna in five soil layers (0-10, 10-20, 20-30, and 40-50 cm) were analysed. It was found that total numbers of nematodes and their generic diversity decreased with increasing soil depth. Out of all nematodes, 65% (in May) and 72% (in September) were found down to a depth of 20 cm. The proportion of nematodes in the deepest studied soil layer (40-50 cm) was the lowest, about 9% in spring samples and only 1.3% in autumn samples. Nematode fauna of the studied site was represented by 43 genera from 27 families. The most common genera in both sampling occasions were Acrobeloides, Aglenchus, Cephalobus, Filenchus, Helicotylenchus, Rotylenchus and Rhabdolaimus. Considerable differences in vertical distribution of some genera were also found. An attempt was made to use some soil characteristics of the studied site in interpretation of the results.

13

Thin chlorophyll layer concomitant of the thermohaline intrusion in the confluence of the Gulf Stream and Labrador Current (a case study)

72%

Karabashev G. S.

Oceanologia

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2019

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tom 61

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nr 4

14

Krill distributions and their diurnal changes (Elephant Island, South Orkney Islands, December 1988, January 1989)

72%

Godlewska M., Klusek Z.

Oceanologia

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1991

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tom 31

15

Summer mesozooplankton community of Moller Bay (Novaya Zemlya Archipelago, Barents Sea)

72%

Dvoretsky V. G., Dvoretsky A. G.

Oceanologia

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2013

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tom 55

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nr 1

16

Distribution and population structure of pelagic Ostracoda near the sea-ice edge in the Scotia Sea and off the King George Island [December 1988 - January 1989]

72%

Blachowiak-Samolyk K., Osowiecki A.

Polish Polar Research

|

2002

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tom 23

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nr 2

135-152

17

Spatial separation of terrestrial ciliates and testaceans (Protozoa): a contribution to soil ciliatostasis

72%

Petz W.

Acta Protozoologica

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1988

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tom 27

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nr 3-4

18

Sowing Scots pine seed with a modified single-seed seeder under controlled conditions

72%

Walczyk J., Tylek P.

Electronic Journal of Polish Agricultural Universities. Series: Forestry

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2004

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tom 07

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nr 2

19

Effect of shrub microhabitats on aboveground and belowground arthropod distribution in a desertified steppe ecosystem

72%

Liu R., Zhu F., Steinberger Y.

Polish Journal of Ecology

|

2015

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tom 63

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nr 4

The influence of the shrub canopy on the spatial distribution of above and below ground arthropod communities in desertified ecosystems is largely unknown. Using the shrubs Hedysarum scoparium (H. scoparium) and Artemisia ordosica (A. ordosica) as model systems, the above and belowground arthropod communities were sampled by using pitfall trapping and hand-sorting, in order to examine the linkage between above and belowground arthropods across shrub microhabitats. Different profile layers harboured mostly distinct arthropod taxon and trophic groups that preferred specific microhabitats. Even the common taxa, including the Carabidae and Formicidae families, were found to have different abundance distributions in above and belowground soil layers across shrub microhabitats. Total abundance distribution was found to differ, while taxon-richness and Shannon-index distributions were similar in above and belowground parts across the shrub microhabitats. Markedly higher taxon-richness and Shannon-index values were found beneath the shrub canopy compared to the open spaces, particularly beneath the A. ordosica shrub canopy. The abundance distribution in above and below ground arthropod communities were affected by the shrub microhabitats along vertical and horizontal axes more than the richness and diversity of these communities. The A. ordosica shrub canopy (compared with the H. scoparium shrub) was found to have greater ecological implications on the spatial distribution of the arthropod communities. All these findings were expected to be helpful for the conservation of biodiversity, shrub plantation management, and desertification control.

20

Vertical distributions of phosphorus fractions in sediments of three typical shallow urban lakes in P.R. China

72%

Chao W., Jin Q., Zhi-yong G., Li Z., Xiao-chen L.

Polish Journal of Environmental Studies

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2008

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tom 17

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nr 1

155-162

Sediment cores were sampled from three typical shallow urban lakes in China. The Standards, Measurements and Testing (SMT) programme, proposed by the European Commission, was employed to characterize the vertical distributions of phosphorus fractions in sediment profiles. The results showed that TP contents ranged from 1,198.9 to 1,897.3, 1,289.1 to 1,652.1, and 611.7 to 760.3 mg kg⁻¹ in sediment profiles of Daming Lake, Mochou Lake, and Xuanwu Lake, respectively. Within the 50-cm sediment profiles, phosphorus distributed mainly in IP, and the OP contents only accounted for 9.7%-16.3% of TP. For IP in sediments, the AP was the predominant fraction for Daming Lake and Mochou Lake, accounting for 92.8%, and 71.4%, respectively. While for Xuanwu Lake the proportion of NAIP to IP was higher than that of AP (41.7%±6.0%), indicating that the Xuanwu Lake was polluted more heavily than the other two lakes. The phosphorus concentration in pore-water (TDP) correlated significantly to the P fractions in sediments, especially to the OP and NAIP contents, which could be predicted by: TDP (mg L⁻¹) = 0.005 OP (mg kg⁻¹) – 0.001 NAIP (mg kg⁻¹) + 0.138 (R² = 0.836, P<0.01). The physicochemical properties of sediments presented significant correlation to the contents of P fractions, highlighting the importance of the physicochemical properties of sediments for the phosphorus fraction distributions in lake sediments.

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