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Wyszukujesz frazę "characeae" wg kryterium: Temat


Wyświetlanie 1-8 z 8
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:
Nitella opaca [Bruzelius] Agardh [Characeae] w Wielkopolsce
Autorzy:
Gabka, M
Pelechaty, M.
Pukacz, A.
Powiązania:
https://bibliotekanauki.pl/articles/878202.pdf
Data publikacji:
2003
Wydawca:
Uniwersytet Przyrodniczy w Poznaniu
Tematy:
Wielkopolska
ramienice
wystepowanie
gatunki zagrozone
glony
Characeae
Nitella opaca
nowe stanowiska
Opis:
This paper presents historical and new localities of Nitella opaca, a rare charophyte species whose distribution in the light of published data and herbarium material was restricted to a few localities in the Wielkopolska region. The basic information on the species ecology and detailed characteristics of phytocoenotic interrelation are provided. So far, the occurrence of Nitelletum opacae in the Wielkopolska region has not been reported.
Źródło:
Roczniki Akademii Rolniczej w Poznaniu. Botanika; 2003, 06; 33-38
1508-9193
Pojawia się w:
Roczniki Akademii Rolniczej w Poznaniu. Botanika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nowe dane o rozmieszczeniu i warunkach siedliskowych ramienic (Characeae) Polski (2010–2012) z uwzględnieniem terenów chronionych i objętych programem rolnośrodowiskowym
New data on the distribution and habitat conditions of stoneworts (characeae) in Poland (2010–2012) including protected areas and lands involved in agri-environmental programmes
Autorzy:
Krajewski, Ł.
Pawlikowski, P.
Gutowska, E.
Jarzombkowski, F.
Kauzal, P.
Kotowska, K.
Kowalska, M.
Brzezińska, K.
Dzierża, P.
Powiązania:
https://bibliotekanauki.pl/articles/339061.pdf
Data publikacji:
2015
Wydawca:
Instytut Technologiczno-Przyrodniczy
Tematy:
Chara
Characeae
ekologia
Nitella
Nitellopsis
program rolnośrodowiskowy
ramienice
agri-environmental programme
ecology
stoneworts
Opis:
W artykule przedstawiono wyniki badań rozmieszczenia ramienic, prowadzonych w różnych regionach kraju w latach 2010–2012. Szczegółowo przedstawiono warunki siedliskowe 52 stanowisk, na których występowało 15 gatunków z rodzajów: Chara (12), Nitella (2) i Nitellopsis (1). W analizowanej grupie stanowisk najczęściej notowano Chara vulgaris, Ch. contraria, Ch. globularis i Ch. virgata. W trakcie badań odnaleziono liczne stanowiska gatunków zagrożonych wymarciem w Polsce, takich jak: Ch. aspera, Ch. filiformis, Ch. hispida, Ch. intermedia, Ch. polyacantha, Ch. rudis i Nitella mucronata. Gatunkiem uznawanym za zanikły w kraju jest odnaleziona Ch. connivens. Ramienice zasiedlały głównie wody płytkie i bardzo płytkie (młaki, torfowiska, potorfia, przybrzeżne strefy akwenów), choć w niektórych rozległych zalanych piaskowniach i kamieniołomach występowały także na znacznych głębokościach (do 8,7 m). Ramienice występowały także na obszarach monitorowanych użytków rolnych, objętych programem rolnośrodowiskowym (Chara vulgaris, Ch. globularis, Ch. virgata, Ch. tomentosa, Ch. hispida). W takich miejscach najczęściej występowała Ch. vulgaris var. longibracteata. Na uwagę zasługuje stwierdzenie zdecydowanej większości stanowisk ramienic poza jeziorami polodowcowymi, w Polsce uznawanymi za ich główne siedlisko. Większość danych z Wyżyny Śląsko-Krakowskiej z lat 2010–2012 omówiono w osobnych pracach, niemniej wykorzystano je w zestawieniach, analizach i wnioskach niniejszej pracy, obejmujących łącznie 22 gatunki na 108 stanowiskach (230 notowań).
The paper is a compilation of stonewort records made during the field surveys in various regions of Poland in the years 2010–2012. We present in detail habitat conditions of 52 sites with 15 charophytes representing 3 genera: Chara (12 species), Nitella (2) and Nitellopsis (1). Among them, there are some of the rarest Polish charophytes like Chara connivens considered extinct in Poland and endangered species like: Ch. aspera, Ch. filiformis, Ch. hispida, Ch. intermedia, Ch. polyacantha, Ch. rudis and Nitella mucronata. Chara vulgaris, Ch. contraria, Ch. globularis and Ch. virgata have been the most frequently found species. Numerous records of charophytes outside glacial lakes (in Poland commonly regarded as the main habitat of stoneworts) are particularly noteworthy. Stoneworts were recorded mostly in shallow and very shallow waters. However, in some deep sand- and stone pits they occurred to a depth of 8.7 m. Surprisingly, charophytes were also found in rural landscape areas included in agri-environment schemes (Ch. vulgaris, Ch. globularis, Ch. hispida, Ch. tomentosa, Ch. virgata). The most often recorded species in such habitats was Chara vulgaris var. longibracteata. Chara vulgaris was also the most frequently recorded species in all types of habitats, confirming its wide ecological amplitude and distribution. Most data of Silesia-Cracow Upland of 2010–2012 were published in detail separately, however, we used them in summaries, analysis and conclusions, which cover a total of 22 species in 108 sites (230 records).
Źródło:
Woda-Środowisko-Obszary Wiejskie; 2015, 15, 2; 65-85
1642-8145
Pojawia się w:
Woda-Środowisko-Obszary Wiejskie
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 1-8 z 8

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