Informacja

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

Wyszukujesz frazę "characeae" wg kryterium: Temat


Wyświetlanie 1-6 z 6
Tytuł:
Methodological add-ons to a non-destructive, micro-CT-based taxonomic/morphometric analysis of characean remains
Autorzy:
Benyó-Korcsmáros, Réka
Gulyás, Sándor
Sebők, Dániel
Benyó, Dániel
Cseh, Péter
Sümegi, Pál
Powiązania:
https://bibliotekanauki.pl/articles/24201075.pdf
Data publikacji:
2023
Wydawca:
Uniwersytet im. Adama Mickiewicza w Poznaniu
Tematy:
characeae
computer tomography
gyrogonite
tomografia komputerowa
gyrogonit
Opis:
Ever since its introduction, computed tomography has come a long way. No longer is it merely a method that is used in clinical diagnostics, but it is becoming more and more popular among palaeontologists because it can be used to analyse both external and internal structures of fossil remains, such as small insects, snail shells and plant remains. The present study describes non-destructive analyses of Late Cretaceous and early Holocene charophyte gyrogonites by using the micro-CT technique, from sample preparation (embedding, fixing) to visualisation and assessment of images obtained. In addition to this non-destructive examination, we wished to test whether or not computed tomography could be used to examine the gyrogonites. Our preliminary results have made it clear that the micro-CT technique is worth employing for further research. It has proved possible to visualise the samples in 3D, rotate them, and observe them from different directions. By using the appropriate parameters, we have also been able to observe density differences between parts of characean remains and to study several important defining features of these.
Źródło:
Geologos; 2023, 29, 2; 69--75
1426-8981
2080-6574
Pojawia się w:
Geologos
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Morphological variability of oospores of Chara baueri A.Braun [Characeae]
Autorzy:
Hutorowicz, A
Powiązania:
https://bibliotekanauki.pl/articles/57169.pdf
Data publikacji:
2007
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
variability
oospore diameter
Characeae
Chara baueri
oospore length
morphology
Opis:
The shape and size of present-day specimens of Chara baueri are described. C. baueri is believed to have practically died out in Europe. Oospores of specimens of C. baueri collected in Kazachstan were subjected to morpholgical analysis. Data recorded included oospore length, oospore diameter, the ratio of length to diameter, the number of lateral convolutions, ridge width, the width of the fossules at the equator, and the diameter of the basal pore. Variation in oospore length and the number of convolutions was higher than had been previously reported in the literature, whereas variation in oospore width was identical to previous reports.
Źródło:
Acta Societatis Botanicorum Poloniae; 2007, 76, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative study of the oospore morphology of two populations of a rare species Chara baueri A. Braun in Cedynia (Poland) and Batzlow (Germany)
Autorzy:
Pukacz, A.
Boszke, P.
Pelechaty, M.J.
Raabe, U.
Powiązania:
https://bibliotekanauki.pl/articles/58067.pdf
Data publikacji:
2012
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
oospore
charophyte
Characeae
morphology
population
rare species
Chara baueri
Cedynia
Polska
Batzlow
Germany
Opis:
Morphological features of oospores of Chara baueri A. Braun, one of the rarest charophyte species worldwide, were studied based on 100 oospores collected from a small and temporarily dried mid-field pond near Cedynia, Western Poland. This is the first Polish and fifth presently known locality of this species. For comparison 67 oospores from a German population (similar pond localized near Batzlow, Germany) were also measured. So far, data on morphology of C. baueri oospores as well as the species ecology are limited. The only more detailed study of oospores for this species was earlier performed on 15 oospores from Kazakhstan. Largest polar axis (LPA, length), largest equatorial diameter (LED, width), isopolarity index (ISI = LPA/LED × 100), number of ridges, width of fossa, distance from apical pole to LED (AND) and anisipolarity index (ANI = AND/LPA × 100) were measured. The comparative analysis revealed that the oospores from Poland are generally bigger and more prolate than the German ones. The differences for most of studied parameters were statistically significant. The finding is discussed in the context of habitat differentiation of both studied sites. Moreover, the results obtained of oospore measurements for both populations differs from most of the data known so far from the literature.
Źródło:
Acta Societatis Botanicorum Poloniae; 2012, 81, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charophytes (Characeae, Charophyta) of the Puszcza Zielonka Landscape Park in Poland: response to the protection and state of catchment areas of the water bodies
Autorzy:
Lisek, D.
Fonfara, P.
Gąbka, M.
Powiązania:
https://bibliotekanauki.pl/articles/2130305.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
Characeae
Chara
Nitella
Chara intermedia
lake
distribution
threatened and rare charophytes
catchment areas
Opis:
This paper presents localities of charophytes in the Puszcza Zielonka Landscape Park (Wielkopolska, Poland). In this area, 16 species of stoneworts occur, constituting 47% of national species from this group. The following are the most frequent species: Chara intermedia, C. tomentosa, C. virgata and Nitellopsis obtusa. Four critically endangered species in Poland (Nitella tenuissima, N. capillaris, N. gracilis and Chara tenuispina) were also recorded. Our research has demonstrated: (1) considerable diversity of charophytes on a relatively small area situated in the vicinity of a large urban centre of Poznań, (2) major importance of protected areas such as nature reserves, landscape parks, or Natura 2000 areas etc. for the preservation of charophyta lake habitats, and (3) the significance of the forms of land use in the catchment areas, where forest vegetation or less dense presence of trees and shrubs prevents eutrophication of the water bodies and thus contributes to the protection of the stonewort species occurring there.
Źródło:
Steciana; 2018, 22, 4; 153-160
1689-653X
Pojawia się w:
Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charophytes of the Lubelszczyzna region (Eastern Poland)
Autorzy:
Urbaniak, J.
Sugier, P.
Gabka, M.
Powiązania:
https://bibliotekanauki.pl/articles/57174.pdf
Data publikacji:
2011
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
Eastern Poland
Chara
Nitella
Lychnothamnus
Nitellopsis
Charophyta
Characeae
species distribution
ecology
Polska
Lublin region
charophyte
Opis:
The distribution and ecology of charophytes in Lubelszczyzna (Eastern Poland) is described based on herbaria collections, literature data, and the author’s own investigations. Maps showing the distribution of all 22 charophyte species identified so far are presented, as well as the details of habitats ecology. Some data on species frequency, conservation, and threats are added.
Źródło:
Acta Societatis Botanicorum Poloniae; 2011, 80, 2
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charophytes (Characeae, Charophyta) of peatland habitats in the vicinity of Drawsko and Mialy (Notec Forest, NW Poland)
Autorzy:
Mroz, P.
Gabka, M.
Powiązania:
https://bibliotekanauki.pl/articles/878280.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
charophyte
Characeae
Charophyta
Chara
Nitella
threatened species
rare species
peatland habitat
vicinity
Drawsko commune
Mialy village
Notecka Forest
Polska
Opis:
This paper presents recent localities of charophytes in the peatland complex of the northern part of Noteć Forest (Wielkopolska, Poland). In alkaline or calcareous fens and shallow waters, seven species of charophytes were found: Chara globularis, C. intermedia, C. virgata, C. vulgaris, Nitella capillaris, N. mucronata and N. syncarpa. Some of the charophytes, which were observed in this area, are regarded as endangered and vulnerable in Poland, especially, C. intermedia, N. capillaris and N. syncarpa. The preliminary research results on the studied charophyte distribution and ecology are presented.
Źródło:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana; 2013, 17
1896-1908
Pojawia się w:
Roczniki Akademii Rolniczej w Poznaniu. Botanika-Steciana
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-6 z 6

    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