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Wyszukujesz frazę "wetland vegetation" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Effect of ecological factors on the zonation of wetland vegetation
Autorzy:
Hrivnak, R
Powiązania:
https://bibliotekanauki.pl/articles/58846.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
vegetation zonation
wetland
wetland vegetation
vegetation change
floristic change
hydrology
zonation
species-environment relationship
Opis:
The influence of some ecological factors to aquatic and marsh vegetation was studied during 1998-2000. Three basic vegetation units (Caricetum buekii, Typhetum latifoliae and Ceratophylletum submersi) and three transitional communities were defined in the belt transect, which was established along the moisture gradient. The content of available soil nutrients in individual vegetation types differed only in case of the Ceratophyllum submersum community, where a higher magnesium and nitrogen content accumulated due to specific environmental conditions. Water and marsh vegetation is usually characterised by a pronounced spatial and temporal dynamics. In the studied area, its zonation was dependent from the terrain morphology, and both depth and duration of floods. The fluctuation of ground and surface water table during a three-year period caused changes in the occurrence and cover of several species (e.g. Carex buekii, Typha latifolia, aquatic macrophytes). Pronounced changes in the cover of some species occurred even within a single vegetation season due to the long-term sink of water table below the ground surface.
Źródło:
Acta Societatis Botanicorum Poloniae; 2005, 74, 1
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental gradients across wetland vegetation groups in the arid slopes of Western Alborz Mountains, N. Iran
Autorzy:
Kamrani, A.
Naqinezhad, A.
Jalili, A.
Attar, F.
Powiązania:
https://bibliotekanauki.pl/articles/56569.pdf
Data publikacji:
2010
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
environmental gradient
wetland
mountain wetland
ecosystem
spatial distribution
dry wetland
vegetation group
arid slope
Alborz Mountains
Iran
Opis:
Mountain wetlands are unique ecosystems in the arid southern slopes of Alborz range, the second largest range in Iran. The spatial distribution characteristics of wetland vegetation in the arid region of the Alborz and the main factors affecting their distributional patterns were studied. A classification of vegetation and ecological characteristics were carried out using data extracted from 430 relevés in 90 wetland sites. The data were analyzed using Two Way Indicator Species Analysis (TWINSPAN) and detrended correspondence analysis (DCA). The wetland vegetation of Alborz Mountain was classified into four large groups. The first vegetation group was calcareous rich vegetation, mainly distributed in the river banks and characterized by helophytes such as Bolboschoenus affinis as indicator species. The second group was saline transitional vegetation, distributed in the ecotone areas and dominated by Phragmites australis. The third vegetation group is wet meadow vegetation which mainly consists of geophytes, endemic and Irano-Turanian species, distributed in the higher altitudes. This vegetation is mainly characterized by indicator species such as Carex orbicularis, high level concentration of Fe2+ and percentage of organic matter in the soil. The fourth vegetation group is aquatic vegetation, distributed in the lakeshores. The aquatic group species are mainly hydrophytic such as Batrachium trichophyllum. The TWINSPAN vegetation groups could be also recognized in the DCA graphs and ecologically differentiated by ANOVA of studied variables. Four vegetation groups can be differentiated on two first axes of indirect ordination. There is a gradient of pH, EC and organic matter associated with altitude on the DCA diagram. Correlation analysis between the axes of DCA and environmental factors shows that altitude, soil texture and other dependant environmental variables (e.g. pH) are the main environmental factors affecting the distribution of wetland vegetation groups.
Źródło:
Acta Societatis Botanicorum Poloniae; 2010, 79, 4
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A new marsh plant community of Eleocharito palustris-Alismatetum lanceolati (Eleocharito palustris-Sagittarion sagittifoliae alliance) in Slovakia
Autorzy:
Hrivnak, R.
Slezak, M.
Sumberova, K.
Hroudova, Z.
Powiązania:
https://bibliotekanauki.pl/articles/58759.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Botaniczne
Tematy:
new plant community
marsh
plant community
Alisma lanceolatum
Eleocharito palustris-Sagittarion sagittifoliae alliance
wetland
vegetation
nomenclature
Slovakia
Opis:
Open and species-poor stands with a dominance of Alisma lanceolatum were recorded in periodically flooded habitats of the southern part of central Slovakia (Ipel' River catchment area) during the summer of 2013. Phytosociological relevés correspond to the association Eleocharito palustris-Alismatetum lanceolati (alliance Eleocharito palustris-Sagittarion sagittifoliae), which is reported and documented here for the first time from the territory of Slovakia. It inhabits predominantly temporarily flooded depressions on agricultural land - wet arable fields and extensively used pastures. Detrended correspondence analysis showed that the variability in species composition was most significantly influenced by water depth, the presence of arable fields in the contact area and water conductivity. Special attention was paid to a detailed description of the floristic composition, habitat requirements, distribution patterns and nomenclature of the community.
Źródło:
Acta Societatis Botanicorum Poloniae; 2015, 84, 3
0001-6977
2083-9480
Pojawia się w:
Acta Societatis Botanicorum Poloniae
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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