Wyniki wyszukiwania

1

Distribution patterns in Iberian Peninsula rodents

100%

Palomo L. J., Vargas J. M., Jimenez-Gomez M. P.

Polish Ecological Studies

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1994

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tom 20

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nr 3-4

2

The phytogeography of West Malesian ferns

86%

Parris B. S.

Fragmenta Floristica et Geobotanica. Supplementum

|

1993

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tom 02

|

nr 2

3

F-actin distribution pattern in the nuclei of early mouse embryos

72%

Bogolyubova I.

Folia Histochemica et Cytobiologica

|

2009

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tom 47

|

nr 3

4

Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik

Cultivation and economic prospects of betel nut (Areca catechu Linn.) and coconut (Cocos nucifera Linn.) in rural economy: A case study from Southeastern region of Bangladesh

72%

Rajasree N., Akhter H., Nurul A.

Environment, Earth and Ecology

|

2019

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tom 3

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nr 1

5

Immunohistochemical characteristic of C cells in European bison thyroid gland

72%

Sokolowska J., Berczynska J., Poweska A., Rygiel D., Olbrych K., Urbanska K.

Folia Histochemica et Cytobiologica

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2018

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tom 56

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nr 4

6

Impacts of environmental heterogeneity on distribution pattern of moss crust patches in temperate desert in Central Asia

72%

Ji X.-H., Pang S.-Q., Zheng Q.

Polish Journal of Ecology

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2018

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tom 66

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nr 2

Moss crusts are the highest developmental stage of biological crusts in arid and semiarid ecosystems worldwide. Under natural conditions, elementary functional units of moss crusts are patches. However, to date, the quantitative features, distribution pattern, ecological effect and relationship with environmental factors of moss patches in desert ecosystems remain unclear. In this study, 3303 moss patches in 22 plots and relevant environmental variables were investigated and quantified in the Gurbantunggut Desert, China. Thirty-six patch classes were defined. Moss crusts accounted on average for 11.7% of the plot area, and the mean moss patch area was 23.4 cm². Small patches dominated, indicating a serious fragmentation of moss crusts. Significant density-dependent effects between patch density and size, humped relationships between patch size and moss plant density, and soil water content under moss patches were observed. The overall distribution of moss crusts showed a tendency of moss patch size and moss plant density decreasing from the southeastern part of the desert to the northwestern part, while moss patch density showed the opposite trend. Pearson's correlation analysis and nonmetric multidimensional scaling analysis consistently demonstrated that the distributions of moss patches were dominantly influenced by non-moss crust coverage, sand particle size, latitude, mean annual precipitation (MAP) and mean annual temperature. Of these parameters, fine sand, high MAP and low latitude were beneficial to the development of moss crusts. Consequently, the factors influencing the distribution pattern of moss crusts are complex and contain the soil factor, current climatic conditions and natural and human disturbances.

7

Socioeconomic, physiognomic, and climatic factors determining the distribution pattern of roe deer Capreolus capreolus in Spain

72%

Aragon S., Braza F., San Jose C.

Acta Theriologica

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1995

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tom 40

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nr 1

In Spain, the highest density of roe deer Capreolus capreolus (Linnaeus, 1758) is found in the northern mountains, whereas towards the south, populations are fragmented into isolated nucleii. In order to analyse the distribution patterns of this species in Spain and its variation during the last five years, a multivariate analysis of the influences of several socioeconomic, physiognomic and climatic factors was performed. This species prefers to inhabit damper and colder areas. Its distribution also reflects changes in human population; roe deer are associated with areas of zero growth or an actual decline in population density. An active management is essential to the conservation of the southern populations due to their geographic isolation and the low populational density of each nucleus.

8

Forest patch dynamics initiated by disturbance: distribution pattern of Larix chinensis (Bessen) patches along the altitudinal gradient in relation to light and temperature conditions (Qinling Mts. China)

58%

Duan R.-Y., Huang M.-Y., Wang X.-A.

Polish Journal of Ecology

|

2013

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tom 61

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nr 2

According to the theory of forest growth cycle, forest communities are dynamic mosaic systems composed of patches in different development stages. On basis of measurement of the four patch types [gap phase (G), building phase (B), mature phase (M) and degenerate phase (D)], the distribution pattern of different patch types and heterogeneity of the light and temperature along an altitudinal gradient were analyzed. The study forests were located in Larix chinensis forests in the Taibai Natural Reserve, and the whole forest was divided into three transects, i.e. low altitude (2900–3000 m a.s.l.), middle altitude (3100–3200 m a.s.l.) and high altitude (3300–3400 m a.s.l.). The implications of environmental heterogeneity on species coexistence and maintenance of species diversity were discussed in this paper. Our results were as follows: (1) In different elevation gradient, the proportions of the four patch types were different. Compared with low elevation and high elevation, in middle elevation, the proportions of gap phase and building phase were obviously lower; while the proportions of mature phase and degenerate phase were noticeably higher. In different elevation gradient, the distribution pattern of the four patch types was changed to some extent. (2) The daily change patterns of light and temperature in different patch types in forest cycle were different. The light intensity was much greater in gap phase than in the other three phases. The light intensity and its amplitude of changes in different patch types followed the order of G>D>B≥M. Air temperature in different patch types followed the order of G>B>D≥M. The amplitude of diurnal temperature changes in air and soil surface followed the order of G>D>B>M. (3) With elevation increasing, light intensity, the biggest air temperature, biggest soil temperature and temperature difference in four patch phase increased significantly, and average air temperature and average soil temperature significantly decreased. The spatio-temporal heterogeneity of ecological factors in different patch types in forest cycle provided a basis to maintain the coexistence of different species with different characteristics within forest community.

9

Distribution patterns and habitat preferences of mountain vascular plant species in the Silesian Uplands (Southern Poland)

58%

Nowak T., Urbisz A., Kapusta P., Tokarska-Guzik B.

Polish Journal of Ecology

|

2011

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tom 59

|

nr 2

The descent of some mountain species into the lowlands is an interesting phenomenon in plant geography and ecology. The main purpose of the present study is to update the list of mountain species for the Silesian Uplands and to provide a synthesis of the knowledge accumulated to date on the habitats for their occurrence, a possible origin and their distribution patterns. In the present study, both the authors’ own records and those obtained by other researchers have been used: published, unpublished and herbarium records, and assembled in a form compatible with the Atlas of distribution of vascular plants in Poland (ATPOL) in the ATPOL– Silesia database). A list of mountain species present in the study region (approximately 4000 km2) is provided in relation to their altitudinal groups. For each species, information about its affiliation to geographical elements and the type of habitats in which it has occurred is recorded. The distribution of mountain species in the Silesian Uplands has been investigated by mapping the species onto a grid of 2 × 2 km squares (1040 in total). For ATPOL squares, containing at least one mountain species (N = 647), CORINE land cover data were obtained and used in explaining the distribution of mountain species composition and richness. In the vascular flora of the Silesian Uplands 76 mountain taxa have been noted, including 2 submontane, 41 montane, 1 subalpine and 32 multizonal species. The list of mountain species has been supplemented with Lonicera nigra and Cirsium erisithales. Many mountain species occurring in the Silesian Uplands have localities distributed throughout the whole region and thus they do not represent any particular type of range. Some species show certain patterns of distribution associated with local habitat conditions. Stands of the montane species are concentrated mainly in the western part of the Silesian Uplands, while the multizonal species are concentrated in the eastern and central part of the study area. Most of the mountain species occur in natural habitats, in particular in broadleaved woodlands, even when they have been degraded. However, some of the species prefer strongly degraded habitats, in particular sand- and clay-pits, quarries and industrial spoils which has been confirmed by multivariate (RDA) analysis. Discussing the possible origin of the mountain species in the Silesian Uplands one can consider migration routes from two directions: from the Sudety Mts. or from the Carpathian Mts. (located approximately 400 km south-west from a study area and 50–100 km south, respectively). Another possible explanation is that the species had a wider range during the glaciations and survived here in refugia.

10

Distribution patterns, floristic structure and habitat requirements of the alpine river plant community Stuckenietum amblyphyllae ass. nova (Potametea) in the Pamir Alai Mountains (Tajikistan)

58%

Nowak A. S., Nobis M.

Acta Societatis Botanicorum Poloniae

|

2012

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tom 81

|

nr 2

This paper discusses the floristic structure, distribution and habitat requirements of a new aquatic syntaxon, Stuckenietum amblyphyllae ass. nova. Patches of the Stuckenietum amblyphyllae association occur in the Pamir Alai Mountains in Middle Asia (Tajikistan). The biotope of this community represent high mountain rivers and ponds at the bottom of glacial river valleys situated at elevations between 1900 and 3800 m. Patches of the Stuckenietum amblyphyllae association are characterised by a clear predominance of the typical species, i.e. Stuckenia amblyphylla, which occupies an aerial extent of between near 40 up to 90% of the surface studied. Patches of the community are poor in species, comprising a maximum of five taxa. Among associated species mainly rush, aquatic, meadow and marsh taxa have been noted. The Stuckenietum amblyphyllae community prefers cold, open, alkaline waters with medium flow-rate, ranging in depth from 15 to 75 cm. It is also, but rarely, found in the mountain ponds. Together with the Stuckenia filiformis community it designates in the Pamir Alai Mountains the upper limit of aquatic vegetation.

11

Distribution patterns of three Potamogeton species (P. crispus, P. nodosus and P. pectinatus) along velocity and base richness gradients from a lowland river

58%

Jakubas E., Gabka M.

Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana

|

2013

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tom 17

This study presents distribution and abundance of three Potamogeton species, namely Potamogeton crispus, P. nodosus and P. pectinatus along environmental gradients in the lowland river Wełna (NW Poland). The relationships between 13 environmental factors and the pattern aquatic vegetation distribution along river were investigated. Among ecological factors rarely undertaken in aquatic ecology the light climate was concerned. It is postulated that the Potamogeton communities in the investigated river are strongly connected with water velocity, substrate of bottom and light conditions, in particular dissolved organic matter (DOM). Elodeo-Potametum crispi and algae communities with dominant species Hildenbrandia rivularis were well developed in the places shading by trees, with high velocity and fairly clean water, mostly with stony bottom. Potametum nodosi was noted in mean values of velocity and medium water quality with high content of organic matter in the bottom substrate. The last investigated community Sparganio-Potametum interrupti was found in poor water quality with the highest values of electric conductivity. The obtained results give a new approach of the ecology and abiotic typology of rivers with macrophytes including abundance of Potamogeton species (Nature 2000 habitat, code 3260 – “Water courses of plain to montane levels with the Ranunculion fl uitantis and Callitricho-Batrachion vegetation”).

12

Analysis and distributional patterns of the invasive flora in a protected mountain area - a case study of Medvednica Nature Park (Croatia)

58%

Vukovic N., Bernardic A., Nikolic T., Hrsak V., Plazibat M., Jelaska S. D.

Acta Societatis Botanicorum Poloniae

|

2010

|

tom 79

|

nr 4

In this paper we have analysed invasive flora of Medvednica Nature Park, Croatia with respect to their origins, life forms, systematic positions, types of seed dispersal, Ellenberg indicator values and spatial distributions using MTB 1/64 grid units for analyses. A total of 27 invasive plant species, belonging to 14 families, were recorded with Asteraceae being the most frequently occurring family. Therophytes were the most common life form, as is generally true of Croatian invasive plants; however, hemicryptophytes and geophytes were more frequent in Medvednica. Here, invasive plants originated mainly from both Americas with slightly lower portion in comparison to all Croatian invasive plants, while contrary was the case when comparing those originated from Asia. The most widespread species was Erigeron annuus (L.) Pers., and the species with the lowest occurrence were Chamomilla suaveolens (Pursh.) Rydb and Datura innoxia Mill. A multiple regression model explains 44% of the spatial variability in the invasive plants data per MTB 1/64 unit, using the number of all recorded plant species, the average elevation and the lengths of paths and roads as estimators. The latter two variables also had the most influence on the ordination axes in analyses of the spatial distribution of seed dispersal types present in each MTB 1/64 unit. Anemochory was the most frequent type of seed dispersal.

13

Distribution patterns and interactions of cestodes in the spiral intestine of the narrownose smooth-hound shark, Mustelus schmitti Springer, 1939 [Chondrichthyes, Carcharhiniformes]

58%

Alarcos A. J., Ivanov V. A., Sardella N. H.

Acta Parasitologica

|

2006

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tom 51

|

nr 2

The distribution patterns and the cestode species interactions within the spiral intestine of 20 specimens of Mustelus schmitti from coastal waters off Mar del Plata, Argentina were studied. Six cestode species were found: Tetraphyllideans Calliobothrium barbarae, C. australis, C. lunae and Orygmatobothrium schmittii, diphyllidean Echinobothrium notoguidoi and trypanorhynch Eutetrarhynchus vooremi. The most common number of parasite species per host was 3. Brillouin’s diversity index ranged from 0.1 to 1.2 Berger-Parker dominance index indicated that C. barbarae was the dominant species, followed by O. schmittii and C. australis. Calliobothrium barbarae, C. australis and O. schmittii presented a broad distribution along the spiral intestine, whereas C. lunae, E. notoguidoi and E. vooremi showed a more restricted niche breadth. In general, the Renkonen’s index showed no evidence of niche overlap in the range of distribution of the different species. In most of the infracommunities, intraspecific aggregation was stronger than interspecific aggregation, indicating that competition may play a little role. The distribution patterns of the Calliobothrium specimens concurs with the predictions of attachment sites for Calliobothrium species made by previous authors.

14

Abundance and distribution patterns if Owls in Pieniny National Park, Southern Poland

58%

Ciach M.

Acta Zoologica Cracoviensia. Ser.A Vertebrata

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2005

|

tom 48A

|

nr 1-2

15

Distribution patterns, history, and dynamics of peatland vascular plants in Pomerania (NW Poland)

44%

Sotek Z.

Biodiversity: Research and Conservation

|

2010

|

tom 18

Ograniczanie wyników

Distribution patterns in Iberian Peninsula rodents

The phytogeography of West Malesian ferns

F-actin distribution pattern in the nuclei of early mouse embryos

Cultivation and economic prospects of betel nut (Areca catechu Linn.) and coconut (Cocos nucifera Linn.) in rural economy: A case study from Southeastern region of Bangladesh

Immunohistochemical characteristic of C cells in European bison thyroid gland

Impacts of environmental heterogeneity on distribution pattern of moss crust patches in temperate desert in Central Asia

Socioeconomic, physiognomic, and climatic factors determining the distribution pattern of roe deer Capreolus capreolus in Spain

Forest patch dynamics initiated by disturbance: distribution pattern of Larix chinensis (Bessen) patches along the altitudinal gradient in relation to light and temperature conditions (Qinling Mts. China)

Distribution patterns and habitat preferences of mountain vascular plant species in the Silesian Uplands (Southern Poland)

Distribution patterns, floristic structure and habitat requirements of the alpine river plant community Stuckenietum amblyphyllae ass. nova (Potametea) in the Pamir Alai Mountains (Tajikistan)

Distribution patterns of three Potamogeton species (P. crispus, P. nodosus and P. pectinatus) along velocity and base richness gradients from a lowland river

Analysis and distributional patterns of the invasive flora in a protected mountain area - a case study of Medvednica Nature Park (Croatia)

Distribution patterns and interactions of cestodes in the spiral intestine of the narrownose smooth-hound shark, Mustelus schmitti Springer, 1939 [Chondrichthyes, Carcharhiniformes]

Abundance and distribution patterns if Owls in Pieniny National Park, Southern Poland

Distribution patterns, history, and dynamics of peatland vascular plants in Pomerania (NW Poland)