Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "morphometric" wg kryterium: Temat

  Lista filtrów
Wyrównaj
Wyświetlanie 1-15 z 16
Tytuł:
Morphometric analysis of Klina River basin using geospatial technology and open access datasets
Autorzy:
Çadraku, Hazir
Hasa, Xhesika
Powiązania:
https://bibliotekanauki.pl/articles/27312608.pdf
Data publikacji:
2023
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
digital elevation model
morphometric analysis
stream
water resources
watershed
Opis:
According to the Water Framework Directive 2000/60 EC, the river basin is the basic unit for integrated water management at the basin level. In this sense, the knowledge of the morphometric parameters of the river takes on special importance. Morphometric analysis helps in understanding the geo-hydrological characteristics of a river basin. Various authors point out that the morphometric analyses of a drainage watershed demonstrate the dynamic equilibrium that has been achieved due to the interaction between matter and energy. The analysis of morphometric parameters also facilitates and helps to understand the hydrological relations of the basin. This paper deals with the morphometric analysis of sub-basins in the Klina River basin which is located in the northeastern part of the Dukagjini depression. To determine the morphometric parameters in the Klina River basin, the digital relief model from the Advanced Land Observation Satellite (ALOS) platform with a resolution of 20 × 20 m and the ArcMap 10.5 software were used. The results reveal that the total number of streams is 753 of which 602 are 1st order streams, 119 - 2nd order, 23 - 3rd order, 6 - 4th order, 2 - 5th order, and 1 - 6th order streams. The mean bifurcation ratio is 3.81, drainage density is 1.52 km∙km-2. The data and information presented in this study will be helpful and interesting in the plan of the management of Klina River basin which covers an area of 477 km2 within which is estimated to live about 100,000 inhabitants.
Źródło:
Journal of Water and Land Development; 2023, 58; 31--41
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Quantitative estimation of 3D cave networks complexity using random walk analysis
Autorzy:
Błachowicz, T.
Andreychouk, V.
Powiązania:
https://bibliotekanauki.pl/articles/294823.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Geomorfologów Polskich
Tematy:
speleomorphogenesis
cave networks
random walk
Hurst exponent
morphometric analysis
Opis:
The paper presents a new method of quantitative parameterization of volumetric-net geomorphological structures with the use of random walk formalism and an analysis of self-similarity exponent distribution derived from random walk experiments. As examples, two American three-dimensional Wind and Lechuguilla cave networks were elaborated. The provided methodology is able to uniquely characterize the morphology of cave systems.
Źródło:
Landform Analysis; 2015, 29; 91-96
1429-799X
Pojawia się w:
Landform Analysis
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of relief development of metal-bonded diamond wheel’s working surface
Ocenka razvitosti relefa rabochejj poverkhnosti almaznykh krugov na metallicheskojj svjazke
Autorzy:
Dobroskok, V.
Shpilka, A.
Morneva, M.
Powiązania:
https://bibliotekanauki.pl/articles/792580.pdf
Data publikacji:
2015
Wydawca:
Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:
wheel
working surface
grinding
3D model
morphometric analysis
triangulation
Źródło:
Teka Komisji Motoryzacji i Energetyki Rolnictwa; 2015, 15, 3
1641-7739
Pojawia się w:
Teka Komisji Motoryzacji i Energetyki Rolnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of 137Cs low level exposure (internal and external) doses on plants
Autorzy:
Marčiulioniene, D.
Kiponas, D.
Lukšiene, B.
Gaina, V.
Powiązania:
https://bibliotekanauki.pl/articles/148666.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radioecology
garden cress
Lepidium sativum L. cells
roots
seeds
morphometric analysis
radiocaesium
Opis:
Effects are described of internal exposure doses of ionizing radiation in above- and underground parts of test plants under natural conditions and in roots of Lepidium sativum L. from accumulated 137Cs under laboratory conditions. In the region most contaminated after the Chernobyl accident, in the tested 10 plant species for 137Cs ionizing radiation the internal exposure doses 3.5 times exceeded those in the Ignalina Nuclear Power Plant environment. Under laboratory conditions the effect of low internal (0.6-600 mSv) and external (40-5500 mSv) exposure doses from 137Cs on garden cress, Lepidium sativum L. roots was, practically, the same. Both internal and external exposure doses stimulated the plant root growth by 12 and 33%, respectively. Different effect of external and internal exposure on the developing plant cells was observed by analyzing the results of morphometric investigations of the primary root cap cells of Lepidium sativum L.
Źródło:
Nukleonika; 2005, 50, 4; 161-166
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphometric analysis and sub-watersheds prioritization of Nagmati River watershed, Kutch District, Gujarat using GIS based approach
Analiza morfometryczna i ustalanie priorytetów dla zlewni rzeki Nagmati, dystryktu Kutch w prowincji Gujarat na podstawie GIS
Autorzy:
Said, S.
Siddique, R.
Shakeel, M.
Powiązania:
https://bibliotekanauki.pl/articles/293152.pdf
Data publikacji:
2018
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
hypsometric analysis
morphometric analysis
Nagmati watershed prioritization
analiza hipsometryczna
analiza morfometryczna
priorytety dla zlewni Nagmati
Opis:
Morphometric analysis of any watershed and its prioritization is one of the important aspects of planning for implementation of management programmes. Present study evaluates the quantitative morphometric characteristics of Nagmati River watershed in Kutch District of Gujarat by utilizing Cartosat-1 data (CartoDEM). In all 19 aerial and 6 linear morphometric parameters of the watershed have been evaluated. Drainage map of the study area reveals a dendritic drainage pattern with sixth order stream network comprising 492 numbers of streams and confining an area of 129.41 km2. Mean bifurcation ratio (Rb) and stream length ratio (RL) of the watershed evaluated are 3.44 and 0.54 respectively which corroborates the fact that drainage pattern is not influenced by the geological evolutions and disturbances in the recent past. The drainage density of 2.68 km∙km–2 indicates impermeable subsoil material with sparse vegetation and moderate to low relief. Elongation ratio of 0.956 infers the basin to be closer to a circular shape. The geologic stage of development and erosion proneness of the watershed is quantified by hypsometric integral (HI) bearing value as 0.5, indicating the landscape to be uniform and in early mature stage. The study prioritizes eight sub-watersheds as high, medium and low for taking up soil and water conservation activities. Hence, remote sensing applications proved to be highly useful in extracting the precise data for the evaluation and analysis of watershed characteristics.
Analiza morfometryczna dowolnej zlewni i ustalanie dla niej priorytetów jest jednym z aspektów planowania podczas wdrażania programów zarządzania zlewnią. W prezentowanych badaniach dokonano oceny ilościowych cech morfometrycznych zlewni rzeki Nagmati w dystrykcie Kutch, prowincja Gujarat, wykorzystując dane Cartosat-1 (CartoDem). Oceniono łącznie 19 powierzchniowych i 6 liniowych parametrów morfometrycznych tej zlewni. Na podstawie mapy obszaru badań można mówić o dendrytowym charakterze drenażu z siecią strumieni szóstego rzędu obejmującą 492 strumienie i pokrywającą obszar 129,41 km2. Średni stosunek bifurkacji (Rb) i stosunek długości strumieni (RL) w zlewni wynoszą odpowiednio 3,44 i 0,54, co potwierdza fakt, że na układ zlewni nie mają wpływu zmiany geologiczne czy zaburzenia w nieodległej przeszłości. Zagęszczenie drenażu równe 2,68 km∙km–2 wskazuje na nieprzepuszczalny materiał podglebia z rzadką roślinnością i urzeźbieniem terenu od umiarkowanego do niewielkiego. Współczynnik wydłużenia 0,956 pozwala wnioskować, że basen ma kształt zbliżony do koła. Geologiczny stan rozwoju i podatność zlewni na erozję wyrażone ilościowo całką hipsometryczną o wartości 0,5 wskazują, że krajobraz jest jednorodny i znajduje się we wczesnym stadium dojrzałości. W badaniach ustalono priorytety dla ośmiu pod-zlewni, nadając priorytet wysoki, średni i niski ze względu na ochronę gleb i wody. Zastosowanie teledetekcji okazało się przydatne w pozyskiwaniu dokładnych danych do oceny i analizy cech zlewni.
Źródło:
Journal of Water and Land Development; 2018, 39; 131-139
1429-7426
2083-4535
Pojawia się w:
Journal of Water and Land Development
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morfometryczna charakterystyka struktury podłoży ogrodniczych
Morphometric characteristic of the structure of horticultural substrates
Autorzy:
Jaroszuk-Sierocinska, M.
Słowinska-Jurkiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/36530.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
podloza ogrodnicze
struktura
analiza morfometryczna
analiza obrazu
horticultural substrate
substrate structure
morphometric analysis
image analysis
Opis:
Przeprowadzono morfometryczną analizę struktury 8 podłoży ogrodniczych wykorzystywanych do uprawy roślin w pojemnikach. Oznaczono podstawowe parametry stosowane w komputerowej analizie obrazu: makroporowatość (powierzchnię względną przekrojów porów o wymiarach powyżej 43 μm), liczebność przekrojów porów, średnią powierzchnię przekrojów porów, długość linii granicznej między przekrojami porów i elementów fazy stałej oraz średni rozmiar przekrojów porów. Wartość makroporowatości pozwala na ocenę zdolności podłoża do retencji wody najłatwiej dostępnej dla roślin.
A morphometric structure analysis was made of 8 horticultural substrates applied for plant cultivation in containers. The basic parameters applied in computer image analysis were investigated, i.e. macroporosity (relative area of cross-section of pores with sizes above 43 μm), number and mean area of pores cross-sections, length of limit line between pore cross-sections and structural elements of solid phase, mean intercept length of pore cross-sections. Value of macroporosity allows the assessment of the substrate ability for retention of easily available water for plants.
Źródło:
Acta Agrophysica; 2011, 17, 1[188]
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological variability of Fraxinus angustifolia Vahl in the north-western Balkans
Autorzy:
Jarni, K.
Westergren, M.
Kraigher, H.
Brus, R.
Powiązania:
https://bibliotekanauki.pl/articles/58877.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Balkans
Fraxinus angustifolia
fruit
morphological variability
morphometric analysis
narrow-leaved ash
plant variation
shaded leaf
plant population
Opis:
Fraxinus angustifolia Vahl is a species native in the north-western Balkans, where it has a divided range. Most of its range is located in flood-prone riparian sites in the Pannonian plain but the species is also found on humid sites along some rivers in the Submediterranean region. We analysed morphologic variation within and between five populations (14 trees/population) located in the Subpannonian and Submediterranean region of Slovenia. Thirty two characters were assessed on ca. 80 leaves from each tree which were divided depending on exposure to sunlight (sun and shade leaves), and 8 traits on each fruit (ca. 50 fruits/tree). A hierarchically designed experiment using analysis of variance confirmed the significant contribution of all the analysed hierarchical levels of variation to the total variation. The results show that the differences between the trees in a single population are the greatest factor of variability of leaves, followed by differences between populations and differences which are the result of variation in exposure to sunlight. Leaves in shade positions are typically larger than those in sunny positions, and they have broader and shorter-pointed leaflets; in this feature they are very similar to the leaves of F. excelsior. Stepwise discriminant analysis showed that the traits which refer to the leaflet number and length are the best differentiating traits between individual populations. The Submediterranean population Dragonja stands out with the smallest leaves and the population Lijak from the same region is the most similar to Dragonja for most morphological traits. In general, phenotypic differences between the Subpannonian and the Submediterranean populations of F. angustifolia are minor and indistinct. Based on the differences ascertained by the study, we can only confirm the presence of F. angustifolia subsp. oxycarpa (Bieb. ex Willd.) Franco et Rocha Alfonso in this part of its natural range.
Źródło:
Acta Societatis Botanicorum Poloniae; 2011, 80, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphometrical and ecological analysis of nematodes of the family Capillariidae (Neveu-Lemaire, 1936) in wild ducks (Anatinae) from the north-western Poland
Autorzy:
Stapf, A.N.
Kavetska, K.M.
Ptak, P.P.
Rzad, I.
Powiązania:
https://bibliotekanauki.pl/articles/5708.pdf
Data publikacji:
2013
Wydawca:
Polskie Towarzystwo Parazytologiczne
Tematy:
morphometric analysis
ecological analysis
nematode
Capillariidae
Capillaria anatis
Eucoleus contortus
Pseudocapillaria mergi
wild duck
Anatinae
ecology
Polska
Źródło:
Annals of Parasitology; 2013, 59, 4
0043-5163
Pojawia się w:
Annals of Parasitology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A comparative cytological and morphometric analysis of vacuolation in central tissue of the effective and ineffective pea [Pisum sativum L.] root nodules
Autorzy:
Borucki, W
Powiązania:
https://bibliotekanauki.pl/articles/56613.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
cytological observation
vacuole
botany
central tissue
vacuolation
pea
infected cell
Pisum sativum
three-dimensional reconstruction
morphometric analysis
root nodule
Opis:
Vacuoles play very important physiological roles in plant cells. Pea root nodules, which exhibit distinct zonation (meristematic zone and central tissue zones), may serve as a good experimental model for the investigations of vacuole development and its importance to cell and tissue functioning. Moreover, the nodule central tissue is composed of both infected and uninfected cells which play different physiological roles and differ in the level of vacuolation. Cytological observations revealed that central vacuoles of the infected cells of the effective nodules expand toward cell walls. Thus only thin layers of the cytoplasm separate each central vacuole from plasma membrane and cell wall. This finding is discussed from the viewpoint of improved exchange of solutes and water between the central vacuole and apoplast of the infected cell. Three-dimensional reconstruction of the vacuoles of infected cells within a fragment of effective nodule central tissue, showed their spatial arrangement. Possible advantages coming from the spatial arrangement of vacuoles within the central tissue are discussed. A comparative study of the central tissue (bacteroidal tissue) and meristem vacuolation of the effective and ineffective pea root nodules is also presented. Morphometric measurements revealed that the effective nodule central tissue was more vacuolated than the ineffective one. It was proved that maturation of the infected cells involves dynamic changes in their vacuolation. Having numerous fixing nitrogen bacteroids, the infected cells of effective central tissue were less vacuolated than uninfected cells. On the other hand, both infected and uninfected cells of the effective central tissue showed a much higher level of vacuolation in nitrogen-fixing zone than cells of the same type in ineffective tissue. These results indicate that vacuolation is an important factor in development and functioning of pea root nodule central tissue.
Źródło:
Acta Societatis Botanicorum Poloniae; 2007, 76, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modification of life history and morphometric traits of montane species as an expression of adaptive abilities to different climatic conditions - a case study of Petasites kablikianus Tausch ex Bercht. (the Babia Gora Mt, Western Carpathians, Poland)
Autorzy:
Uzieblo, A.K.
Powiązania:
https://bibliotekanauki.pl/articles/58757.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Petasites kablikianus
Compositae
modification
life history
morphometric analysis
montane species
adaptive ability
climate condition
Babia Gora Massif
Western Carpathians Mountains
Polska
Opis:
Detailed data on the response of plants to different climatic conditions could gain insight into the early impacts of climate change upon functioning ecosystems especially alpine ones, the most specialized. Petasites kablikianus (Asteraceae) is a species with montane and disjunctive distribution range, and it is one of the best objects to such investigations. In Polish high mountains, it is represented the best on the northern slopes of the Babia Góra massif (the Babiogórski National Park) and it occurs in two, independent zones: subalpine (landslides, rock rubbles) and lower montane zone (gravels on stream banks). The climatic differences between these two zones result in a morphological differentiation of specimens but mainly in differences in the dynamics of the life history of both populations. Detailed phenological observations and biometrical measurements were made on five plots on both gynodynamic and androdynamic shoots in their natural environment and after transplantation. The most important result is a fact that the subalpine population is completely phenologically isolated. Moreover the differences in the dates of beginning vegetation and in the duration and dynamics of particular stages of development and in morphological structure of individuals between the upper and lower populations were also stated. The results show that the adaptability of the species present a great potential to respond to the possible effects of global warming by modifying the life history and extending of distribution range for low-lying areas.
Źródło:
Acta Societatis Botanicorum Poloniae; 2015, 84, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Tapirs from the Pleistocene of Venezuela
Autorzy:
Holanda, E.C.
Rincon, A.D.
Powiązania:
https://bibliotekanauki.pl/articles/20061.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Instytut Paleobiologii PAN
Tematy:
tapir
Tapirus terrestris
Pleistocene
Venezuela
Mammalia
Perissodactyla
Tapirus
El Breal de Orocual
Zumbador Cave
locality
paleontology
remains
systematics
tooth
measurement
morphometric analysis
Opis:
The living tapir Tapirus terrestrisis widely distributed in Venezuela, occurring mainly south of the Orinoco, while being absent from arid, high Andean and insular areas. Here, we describe new material of fossil tapirs from two Pleistocene localities of Venezuela: Zumbador Cave and El Breal de Orocual. Based on its size and morphology, the material from Zumbador Cave (skull, mandible and postcrania) is assigned to the extant T. terrestris, and represents the most northwestern fossil record of this species in South America. By contrast, the remains from the tar seep of El Breal de Orocual are more gracile, and differ from T. terrestris and other fossil and living species from South America in the presence of a metastylid on the lower cheek teeth. We tentatively assign the latter remains to Tapirussp., based on juvenile and isolated dentary material. However, the possibility that these specimens may represent a new species or an immigrant from North America cannot be completely excluded.
Źródło:
Acta Palaeontologica Polonica; 2012, 57, 3
0567-7920
Pojawia się w:
Acta Palaeontologica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza morfometryczna planów miejscowych w Polsce
The morphometric analysis of local spatial development plans in Poland
Autorzy:
Izdebski, W.
Śleszyński, P.
Malinowski, Z.
Kursa, M.
Powiązania:
https://bibliotekanauki.pl/articles/101406.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Stowarzyszenie Infrastruktura i Ekologia Terenów Wiejskich PAN
Tematy:
miejscowy plan zagospodarowania przestrzennego
analiza morfometryczna
chaos przestrzenny
usługi sieciowe
WFS
WMS
local spatial development plan
morphometric analysis
spatial chaos
network services
Opis:
Celem artykułu jest przedstawienie prawidłowości dotyczących wielkości, kształtu oraz cech topologicznych, obowiązujących (uchwalonych) w gminach, miejscowych planów zagospodarowania przestrzennego. Materiał źródłowy do badań stanowiły dokumenty planistyczne, które zostały zinformatyzowane przez firmę Geo-System Sp. z o. o. i udostępnione poprzez usługi sieciowe WMS/WFS. Dzięki temu moż- liwe było pozyskanie informacji o przebiegu granic w terenie, a tym samym analiza prawidłowości, cech struktury, itp. w zakresie powierzchni, kształtu i relacji topologicznych. Analizowano w sumie 15 390 planów miejscowych, czyli 31,2% ich całkowitej liczby w Polsce. Artykuł jest pierwszą w Polsce analizą struktury (powierzchni, granic, kształtu itd.) opartą na tak dużej, wielotysięcznej próbie planów miejscowych. Wnioski z badań dowodzą, że sposób wyboru obszarów do pokrycia planami i określenie ich granic w terenie nie przyczyniają się do poprawy ładu przestrzennego oraz że zasięg przestrzenny oddziaływania tych dokumentów w dużej części nie jest większy, niż w przypadku decyzji lokalizacyjnych (decyzji o warunkach zabudowy i zagospodarowania terenu).
The aim of the article is to present regularities regarding the size, shape and topological characteristics of existing (passed) local spatial development plans in Poland (Polish communes). The source material for the research was planning documents, drawings of which were authorized by Geo-System and made available through WMS/WFS network services. As a result, it was possible to obtain information on the course of boundaries in the field, and thus the analysis of regularity, structure characteristics, etc. in terms of surface, shape and topological relations. Total of 15,390 local plans were analyzed, i.e. 31.2% of their total number in Poland. The article is the first in Poland analysis of the structure (area, boundaries, shape, etc.) based on a large, many thousandth attempt of local documents. The conclusions from the research show that the method of selecting areas to cover plans and defining their boundaries on the ground do not contribute to the improvement of spatial order and that the spatial extent of impact of these documents is not much larger than in the case of location decisions (decision on building conditions and land development).
Źródło:
Infrastruktura i Ekologia Terenów Wiejskich; 2018, II/1; 331-347
1732-5587
Pojawia się w:
Infrastruktura i Ekologia Terenów Wiejskich
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphometric analyses of the leaf variation within Quercus L. Sect. Cerris Loudon in Turkey
Autorzy:
Uslu, E.
Bakis, Y.
Powiązania:
https://bibliotekanauki.pl/articles/41514.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Instytut Dendrologii PAN
Tematy:
morphometric analysis
leaf
variation
Quercus cerris
Turkey oak
Austrian oak zob.Turkey oak
oak
cluster analysis
numerical taxonomy
principal component analysis
Turkey [geogr.]
Opis:
Oaks are classified heavily based on the leaf morphology. However, identification of specimens without acorns is usually controversial in Cerris section. Although members of Cerris section have a broad distribution area, there are only few taxonomic studies. Therefore, the current study is the first to show the discrimination of species in Cerris section based on leaf characters from Turkey. Discrimination among the members of Cerris section over Turkey (Q. cerris L. var. cerris, Q. ithaburensis Decne. subsp. macrolepis (Kotschy) Hedge and Yalt, Q. brantii Lindley, Q. libani Olivier, and Q. trojana P. B. subsp. trojana.) was aimed and variations within and among the species based on 15 qualitative leaf characters was presented. In this work we have studied the natural variability of these species by analysing leaf materials collected from 44 populations around Turkey. Cluster Analysis (CA) and Principal Component Analysis (PCA) were performed to assess intra-specific differentiation and to compare the distribution of variance in the individual and population level. The results showed that the leaf characters presented a good discrimination of five Cerris taxa in PCA at the population level, but the relationships between Q. ithaburensis subsp. macrolepis and Q. brantii showed complex groups in CA. Among the studied taxa, the highest variation was found within Q. cerris populations. In this work, we obtained discrimination of Cerris section species from Turkey based on leaf characters which is quite useful for those herbarium specimens without acorns and in other systematic observations.
Źródło:
Dendrobiology; 2014, 71
1641-1307
Pojawia się w:
Dendrobiology
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
An attempt to characterise soil macroporosity on the basis of structure standards
Autorzy:
Bryk, M
Domzal, H.
Pranagal, J.
Slowinska-Jurkiewicz, A.
Powiązania:
https://bibliotekanauki.pl/articles/1401857.pdf
Data publikacji:
2000
Wydawca:
Polska Akademia Nauk. Instytut Agrofizyki PAN
Tematy:
soil macroporosity
rendzina soil
computer image analysis
structure standard
loess
soil porosity
water property
porosity
macroporosity
morphometric analysis
air property
soil preparation
black earth
Opis:
The aim of this work was to characterise macro porosity of soil preparations by means of image analysis. Preparations were made from the samples taken from 0-20 cm layer of four types of soil: typical soil lessive developed from loess, proper rendzina developed Irom cretaceous marl, chernozemic rendzina developed from chalk and mud-gley soil developed from clayey silt. The values of porosity by image analysis, Pk, (pores of the diameter greater than 200 (µm) were compared with the values of field air capacity, (Ppp, pores greater than 20 µm) and total porosity, determined by classical methods used in soil science. For most of the samples porosity obtained by computer image analysis, Pk, was lower than the values of field air capacity, Ppp„ as expected. For the rest of standards, the values obtained morphometrically, Pk, were higher than Ppp. It probably- resulted fram unequal pore sizes in the dried and moistened soil material and innate altributes of the method of soil water desorption. Statistical analyses revealed strong, statistically valid dependencies, with high values of the correlation coefficients (0.883 - 0.951) between porosity, Pk, total porosity, Po, and field air capacity, Ppp. Moreover, correlation indices calculated for Po and Ppp confirmed the already known relation.
Źródło:
Acta Agrophysica; 2000, 35; 23-30
1234-4125
Pojawia się w:
Acta Agrophysica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genome size and phenotypic variation of Nymphaea (Nymphaeaceae) species from Eastern Europe and temperate Asia
Autorzy:
Dabrowska, M.A.
Rola, K.
Volkova, P.
Suda, J.
Zalewska-Galosz, J.
Powiązania:
https://bibliotekanauki.pl/articles/59355.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
genome size
phenotypic variation
Nymphaea alba
Nymphaea candida
Nymphaea tetragona
Nymphaea x borealis
Nymphaeaceae
morphometric analysis
flow cytometry
interspecies hybridization
Eastern Europe
temperate region
Asia
Opis:
Despite long-term research, the aquatic genus Nymphaea still possesses major taxonomie challenges. High phenotypic plasticity and possible interspecific hybridization often make it impossible to identify individual specimens. The main aim of this study was to assess phenotypic variation in Nymphaea taxa sampled over a wide area of Eastern Europe and temperate Asia. Samples were identified based on species-specific genome sizes and diagnostic morphological characters for each taxon were then selected. A total of 353 specimens from 32 populations in Poland, Russia and Ukraine were studied, with nine biometric traits being examined. Although some specimens morphologically matched N. xborealis (a hybrid between N. alba and N. Candida) according to published determination keys, only one hybrid individual was revealed based on genome size data. Other specimens with intermediate morphology possessed genome size corresponding to N. alba, N. Candida or N. tetragona. This indicates that natural hybridization between N. alba and N. Candida is not as frequent as previously suggested. Our results also revealed a considerably higher variation in the studied morphological traits (especially the quantitative ones) in N. alba and N. Candida than reported in the literature. A determination key for the investigated Nymphaea species is provided, based on taxonomically-informative morphological characters identified in our study.
Źródło:
Acta Societatis Botanicorum Poloniae; 2015, 84, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 16

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies