Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 21

Liczba wyników na stronie
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych:  struktura zbiorowisk
help Sortuj według:

help Ogranicz wyniki do:
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
1

Klonalnosc u roslin naczyniowych

100%
Stanislawski K.
Aura
|
2007
|
nr 12
14-15
2

Struktura i zmiany skladu gatunkowego mieszanek trawiastych w procesie biologicznej rekultywacji skladowiska odpadow komunalnych

100%
Kiryluk A.
Roczniki Gleboznawcze
|
2004
|
tom 55
|
nr 2
219-229
3

Struktura roslinnosci starorzeczy jako wyraz dynamiki warunkow siedliskowych

100%
Ratynska H., Szwed W.
Przegląd Przyrodniczy
|
1999
|
tom 10
|
nr 3-4
33-48
4
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Struktura zbiorowisk fitoplanktonu w strefie szuwaru i pelagialu w Jeziorze Budzynskim

100%
Celewicz S., Messyasz B., Burchardt L.
Roczniki Akademii Rolniczej w Poznaniu. Botanika
|
2001
|
tom 04
3-11
The research of the qualitative and quantitative phytoplankton structure of the rush and open water zones of two basins of the Budzynskie Lake differing in the presence of submerged macrophytes was conducted. A greater variety of phytoplankton species was present in the overgrow basin, as a result of enrichment of the zone of open water above submerged macrophytes by periphyton taxa. In the same basin the reduction of phytoplankton taxa numbers and biomass appeared, that can be connected with pressure of zooplankton grazing and with repressing influence of macrophytes.
5

Ksztaltowanie sie lesnych zbiorowisk zastepczych na obszarach uzytkowanych rolniczo

100%
Laska G.
Przegląd Przyrodniczy
|
1997
|
tom 08
|
nr 1-2
77-86
6
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Struktura ugrupowan peryfitonowych Jeziora Wielkowiejskiego

84%
Kuczynska-Kippen N., Messyasz B., Nagengast B.
Roczniki Akademii Rolniczej w Poznaniu. Botanika
|
2004
|
tom 07
175-191
The work presents the results of the research carried out on epiphytic communities in two macrophyte habitats – Chara tomentosa and Typha angustifolia. The different architecture of both aquatic substrata led to the differentiation of the taxonomical and quantity structure of periphyton.
7

Zroznicowanie roslinnosci i wtorna sukcesja w murawowo-lesnym rezerwacie Skolczanka kolo Krakowa

84%
Dzwonko Z., Loster S.
Ochrona Przyrody
|
1992
|
tom 50
|
nr 1
33-64
8

Struktura zbiorowisk grzybow ryzosferowych z sadzonek debu szypulkowego i debu czerwonego w zaleznosci od metody izolacji

84%
Manka M., Kacprzak M.
Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa
|
1999
|
tom 63
119-127
9

Tendencje dynamiczne roslinnosci lesnej Drawienskiego Parku Narodowego jako postulowana podstawa lesnej gospodarki rezerwatowej

84%
Pawlaczyk P.
Przegląd Przyrodniczy
|
1994
|
tom 05
|
nr 3-4
139-165
10
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Zastosowanie regionu ITS1/2 rDNA i 18S rDNA do badania mykobioty gleby leśnej

84%
Behnke-Borowczyk J., Kwasna H.
Sylwan
|
2016
|
tom 160
|
nr 07
The aim of the studies was to check the usefulness of ITS1/2 rDNA and 18S rDNA regions in the molecular investigation of forest soil microbiota structure. Soil studied, originated from a 1−year−old plantation and a 40−year old stand of Scots pine located in Bierzwnik and Międzychów forest districts located 200 km apart. The hypothesis assumed that both approaches lead to the discovery of abundant microbiota communities with different structures and with rare common species. The environmental DNA was extracted with a Power Soil ® DNA Isolation Kit from two soil samples in each site. The ITS1/2 rDNA was amplified with specific primers ITS1 and ewfitsrev 1, and 18S rDNA with universal primers NS1 and NS2. PCR products were cloned into pGEM−T Easy. Inserts were primarily selected in blue/white screening on a X−gal medium. Representative clones were further selected in two separate RFLP analyses with HhaI and BsuRI restriction enzymes. Representative clones purified and sequenced using the Sanger Method in the DNA Research Centre (Poznań). Each sequence was identified to the lowest taxonomic rank. Ninety to 233 clones with DNA of 5−44 taxa including 3−37 taxa of fungi were obtained from 4 samples of soil. After application of ITS1/2 rDNA and 18S rDNA, the fungal DNA was detected respectively in 89,60−100,00% and 11,77−64,8% clones and the number of fungal species detected was respectively 12−37 and 3−19. Fungi were represented by four orders: Chytridiomycota, Zygomycota, Ascomycota and Basidiomycota. Both primers also amplified also DNA of other organisms (mostly from Animalia and Protista Kingdom) represented by 0−9 taxa. If compared, the application of forest soil microbiota structure with ITS1/2 rDNA and 18S rDNA led to detect a lower abundance of fungi and a bigger abundance of other organisms. Considering the higher number of clones and taxa recognized, the region of ITS1/2 rDNA was more effective in the studies of the soil microbiota structure. The region of 18S rDNA was efficient in local detection of Chytridiomycota and Zygomycota and of rare species of fungi from Ascomycota and Basidiomycota. Despite the deficiency of NCBI database the use of the 18S rDNA region in studies on fungal community the region should be included in molecular studies of fungal diversity. It is concluded that studies on the biodiversity of soil microorganisms need the application of a few independent methods of detection and identification.
11

The structure of plant communities on the example of an oak-pine forest [Pino-Quercetum] in Ratanica Valley [Carpathian Foothills]. I.

84%
Pancer-Kotejowa E., Rozanski W.
Acta Societatis Botanicorum Poloniae
|
1992
|
tom 61
|
nr 1
45-62
12
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Struktura zbiorowisk grzybów mykoryzowych po pożarze drzewostanu sosny zwyczajnej na siedlisku boru suchego

67%
Hilszczanska D., Gil W., Olszowska G.
Sylwan
|
2019
|
tom 163
|
nr 01
Ectomycorrhizal communities associated with Pinus sylvestris growing on dry coniferous forest habitat after the fire were studied. In order to investigate the fire effect on ectomycorrhizal fungi and changes of soil parameters in the upper (0−15 cm) soil layer three study plots were established: 1 – the control, 2 – fire zone left for artificial renewal (with the economic method of renewal) and 3 – fire zone left for natural renewal. The analysis of mycorrhizae revealed presence of eight mycorrhizal fungi on Scots pine roots and the value of Shannon−Wiener species diversity index H’ equaled to 1.76. The most abundant were mycorrhizae formed by Tomentella feruginea (31.7%) and Hebeloma crustuliniforme (23.3%). The fraction of Paxillus involutus and em>Rhizopogon sp. mycorrhizae was 16.7% and 13.0%, respectively. The lowest was the number of Thelephora terrestris mycorrhizae (only 1.7%). At the site 2, number of mycorrhizal fungi diminished to five and Shannon−Wiener species diversity index was also lower (1.37). The predominant were mycorrhizae of Cenococcum eophilum (26.7%) and P. involutus (21.7%), whilst the lowest were mycorrhizae of Suillus luteus (1.7%). Although at the third site the number of ectomycorrhizal fungi was the same as on the site 2, the dominance of Thelephora terrestris (66.7%) caused that Shannon−Wiener’s species diversity index was the lowest (1.05). Mycorrhizae of Paxillus involutus and Wilcoxina mikolae were characterised by similar abundance (13.3% and 11.7%, respectively). The lowest number of mycorrhizae was observed for Tomentella sp. (3.3%). Analysis of soil parameters showed an increase of pH on burnt sites in comparison to the control. The soil of burnt sites were also characterised by lower value of C and C/N ratio than the soil on the control treatment. The result showed that ubiquitous mycorrhizal fungi, such as T. terrestis, are able to persist on roots in changed soil environment with low content of nutritions.
13

Zaleznosci miedzy stezeniami fosforu i azotu a struktura i liczebnoscia planktonu roslinnego w dwoch stawach debinskich w Poznaniu

67%
Reiter S., Burchardt L.
Badania Fizjograficzne nad Polską Zachodnią. Seria B
|
2005
|
tom 54
143-176
14
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Zbiorowisko z Betula pendula i Populus tremula w zadrzewieniach śródpolnych zachodniej części Pojezierza Drawskiego

67%
Mlynkowiak E., Kutyna I.
Folia Pomeranae Universitatis Technologiae Stetinensis. Agricultura, Alimentaria, Piscaria et Zootechnica
|
2009
|
tom 10
15
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Struktura zbiorowisk grzybów i bakterii w glebie 1-rocznej uprawy i 10-letniego młodnika w zależności od sposobu przygotowania gleby

67%
Kwasna H., Lakomy P., Gornowicz R., Mikicinski A., Borowczyk-Behnke J., Galazka S.
Sylwan
|
2015
|
tom 159
|
nr 01
Effects of post−harvest wood−debris utilization and pre−planting soil preparation in clear−cut forest on the community structure of soil fungi and bacteria and their possible biological activity towards Armillaria and Heterobasidion were studied in 1− and 10−year−old Scots pine plantations in Bierzwnik and Międzychód Forest Districts (W Poland). Post−harvest wood−debris utilization included: (i) removal from the surface, (ii) spread of the coarse or chipped wood−debris on the surface and (iii) mixing of the chipped wood debris with the soil. Pre−planting soil preparation included: (i) deep furrowing, (ii) shallow turning of the topsoil, (iii) ridging and (iv) no ground preparation. The soil−dilution method was used for detection of fungi and bacteria in soil. Morphotyping was used for identification of fungi. Phenotypic traits and biochemical properties were used for identification of bacteria. Molecular method, MID−66 or BIOLOG® systems were additionally applied for identification of the most common bacteria. Removal of post−harvest wood−debris from the surface of the clear−cut land and shallow turning of the topsoil or ridging before planting increased abundance of fungi in soil of 1−year−old Scots pine plantation. Deep furrowing resulted in increased abundance of fungi and no ground preparation in increased abundance of bacteria in soil of 10−year−old Scots pine plantation. Increased abundance of fungi and bacteria was associated with increased abundance of taxa considered as antagonistic to Armillaria and Heterobasidion. Removal of the post−harvest wood debris and moderate or no mechanical intervention into the soil habitat on the clear−cut site before planting of Scots pine seedlings seems to create the habitat, which may be beneficial for the growth of young trees.
16

Zmiany składu i struktury Thalictro-Salvietum pratensis w rezerwacie "Skowronno" na Wyżynie Małopolskiej a problem ochrony muraw kserotermicznych

67%
Poznańska Z.
Parki Narodowe i Rezerwaty Przyrody
|
1991
|
tom 10
|
nr 3-4
17
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Wpływ metodyki badań na ocenę struktury zbiorowisk mikroorganizmów w glebie leśnej

67%
Behnke-Borowczyk J., Kwasna H.
Sylwan
|
2016
|
tom 160
|
nr 06
Two different communities of microorganisms were identified in soils by application of the classical method of fungi isolation (soil dilution, culturing on artificial media, morphotyping) and a molecular method (extraction of the environmental DNA, amplification with universal primers NS1 and NS2, cloning and sequencing of representative clones). No organisms were common to both communities. Apart from rare representatives of the Animalia, communities included single fungus−like Eucarya belonging to the Protista, Class Oomycota, and numerous fungi belonging to Chytridiomycota, Zygomycota, Ascomycota and Basidiomycota orders. In total, 88 species were identified in four soil samples. Fungi were mostly Ascomycota. The classical method was particularly effective in detection of fungi important for creation of phytosanitary conditions of soil, i.e. antagonists (Penicillium, Tolypocladium and Trichoderma) and potential stimulants (dark−pigmented Hormiactis candida, Humicola spp. and Phialophora spp.) of phytopathogens (including the common forest genera Armillaria and Heterobasidion). Application of the classical method allowed the detection of mycorrhizal Ascomycota from the genus Oidiodendron. Application of the molecular method allowed the detection of 13 mycorrhizal Basidiomycota. Although primers NS1 and NS2 were designed from a match with DNA of culturable organisms, they also amplified the DNA of non−culturable organisms. This emphasizes their potential usefulness in studies of the biodiversity of microorganisms in environmental samples. The shortage of reference sequences in the database discourages use of the 18S rDNA region in studies on fungal communities. The studies on the biodiversity of microorganisms need the application of a few independent methods of detection and identification.
18

Porownanie struktury zbiorowisk grzybow z ryzosfery zewnetrznej i ryzoplanu Betula pendula Roth. i Larix decidua Mill. na powierzchni doswiadczalnej w Pniowcu [GOP]

67%
Stepniewska H.
Zeszyty Naukowe Akademii Rolniczej w Krakowie. Sesja Naukowa
|
1999
|
tom 63
167-181
19

Wplyw zroznicowanego wieloletniego nawozenia mineralnego na zbiorowiska lakowe na glebie torfowo-murszowej

67%
Kaminski J.
Woda - Środowisko - Obszary Wiejskie
|
2003
|
tom 03
|
nr 1[07]
53-67
20
Artykuł dostępny w postaci pełnego tekstu - kliknij by otworzyć plik
Content available

Struktura zbiorowisk fitoplanktonu Jeziora Chrzypskiego (Sierakowski Park Krajobrazowy, Wielkopolska)

51%
Celewicz S., Kluza-Wieloch M., Pertek A.
Steciana
|
2021
|
tom 25
|
nr 4
Pierwsza strona wyników Pięć stron wyników wstecz Poprzednia strona wyników Strona / 2 Następna strona wyników Pięć stron wyników wprzód Ostatnia strona wyników
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.