Macrophyte vegetation of Eastern and North-eastern Bohemia

Černohous, František; Husák, Štěpán

doi:10.1007/bf02854662

Cited by 24 publications

(17 citation statements)

References 2 publications

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“…A rare hybrid taxon, Potamogeton ×angustifolius, formed nearly monodominant submerged stands, adjacent to localities with Potametum lucentis, Potametum graminei, and Polygonetum amphibii. The community was validly described for the first time in a fishpond near the village of Holice in the north-eastern part of the Czech Republic (Černohous & Husák 1986) and it was also reported in other localities of the country (Černohous & Husák l986;Rydlo 2005;Šumberová 2011b). It is also found in localities in Germany (Rennwald 2000), and India, Kashmir (Zutshi 1975).…”

Section: Methodsmentioning

confidence: 53%

“…In the published relevés, other true aquatic species also occurred, e.g. Callitriche palustris, Lemna minor, Myriophyllum spicatum, Potamogeton natans, P. obtusifolius, Sparganium emersum (Černohous & Husák 1986;Nowak et al 2007). Another community, new in the territory of Slovakia, Potametum zizii, was found in the littoral zone of the Oravská priehrada water reservoir.…”

Section: Methodsmentioning

confidence: 99%

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Vegetation of the aquatic and marshland habitats in the Orava region, including the first records of Potametum alpini, Potametum zizii and Ranunculo-Juncetum bulbosi in the territory of Slovakia

2011

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The vegetation of the aquatic and marshland habitats of the Orava region (north of Slovakia) was studied in 2009, using traditional phytosociological methods. Sixteen aquatic and eighteen marsh plant communities were described within 96 phytosociological relevés by using TWINSPAN with the application of the dominance principle. Three associations, Potametum alpini, Potametum zizii and Ranunculo-Juncetum bulbosi, were found as new communities for Slovakia. Myriophylletum verticillati, Potametum nodosi, Potametum graminei and Alisma gramineum community were recorded in the northernmost localities in Slovakia. Among marsh communities, Calletum palustris is very rare, both in the Orava region and in Slovakia as a whole. According to Ellenberg's indicator values (EIV), moisture was evaluated as the main ecological gradient. Plant communities are ordered along the first Detrended Correspodence Analysis (DCA) axis in a typical hydroseries (Potametea → Lemnetea → Phragmition communis → Phalaridion arundinaceae, Oenanthion aquaticae and Sparganio-Glycerion → Magnocaricion elatae). The second DCA axis was most correlated with EIV for nutrients. Among the five directly measured ecological characteristics (temperature, pH and conductivity of water, water depth, and substrate type), conductivity of water (0.44, P < 0.01) and substrate type (0.32, P < 0.05) were the statistically significant variables explaining the variability along the first DCA axis.

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Section: Methodsmentioning

confidence: 53%

Section: Methodsmentioning

confidence: 99%

Vegetation of the aquatic and marshland habitats in the Orava region, including the first records of Potametum alpini, Potametum zizii and Ranunculo-Juncetum bulbosi in the territory of Slovakia

2011

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“…Some species are present in the whole ecosystems, but are more abundant in the boundary zones, as Sparganium emersum or Potamogeton pusillus. Species which are preferently out of the boundary zones can be located mostly downstream, as Lemna trisulca, which is considered as eutraphent species (Wiegleb, 1978;Cernohous & Husak, 1986;Klein & Carbiener, 1989), or upstream, as Veronica beccabunga or Chara sp. A number of species are confined to the adjacent zones.…”

Section: Discussionmentioning

confidence: 99%

“…Some other species (Hippuris vulgaris, Sagittaria sagittifolia, Luronium natans) are strictly limited to the boundary zones. Hippuris vulgaris, which is found in all three boundary zones, is adapted to variations of flow velocity and depth, and grows preferentially on fine sediments and in mesotrophic (with reference to and [N-NH4 + ] enrichment, see Carbiener et al, 1990;Tr6molieres et al, 1991 for further details), cold, stenothermic hardwaters (Haslam et al, 1975;Ortscheit, 1985;Cernohous & Husak, 1986;Mooney & O'Connell, 1990). Sagittaria sagittifolia and Luronium natans are found in the Mant and Vieux-Rh6ne boundaries, and nowhere else along the channels.…”

Section: Discussionmentioning

confidence: 99%

Groundwater-surface water ecotones at the upstream part of confluences in former river channels

Bornette

Large

1995

Hydrobiologia

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Two slow flowing former channels of the Rh6ne River, which are supplied by nutrient-poor groundwater and subject to backflows of nutrient-rich water from the Rhtne, were studied in order to demonstrate the occurrence of an ecotone located upstream to their confluences with the main channel. In one of the channels, the long-term stability of the boundary zone compared to the other sections was investigated by examining floristic changes over the period of a decade, demonstrating its high temporal stability compared to the adjacent systems. This stability is seen to be a result of both external and internal processes: backflows of river water rich in suspended sediment favour alluvial deposition of silt in the ecotone area, which in turn allows the growth of numerous hydrophyte species, many of which have specific environmental requirements. These macrophytes promote sediment retention and deposition (a positive feed-back mechanism), thus acting as a filter for the surface water flow. Finally, flash floods regularly scour fine sediment deposits and rejuvenate these areas on a patch by patch basis. The occurrence of boundary zones is demonstrated in the areas located upstream from the confluence in both channels under study. The seasonal chemical variability of the channels and the RhOne itself, as compared to the backflow area, was analysed using chemical variables that are influenced by water fluxes. The fluctuations of the chemical parameters of the boundaries are seen to be intermediate between those of the adjacent systems in one case and higher in the other. With reference to recent definitions in the scientific literature, the overall characteristics of these boundary areas lead us to conclude that they can be considered as ecotones between two water fluxes.

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“…qualitative changes in the species composition, according to van der Maarel 1988) would occur at an interannual scale. Aquatic vegetation is appropriate for this type of analysis because it integrates both long-term changes (the terrestrialization processes and eutrophic ation; Kohler et al 1974;Wiegleb 1978;Cernohous & Husak 1986;Carbiener et al 1990) and short-term changes (seasonality; Ham et al 1981;Johnson et al 1985;Wiegleb 1988;Wiegleb etal. 1989).…”

Section: Introductionmentioning

confidence: 99%

Succession and fluctuation in the aquatic vegetation of two former Rh�ne River channels

et al. 1994

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The vegetation dynamics in two former braided channels of the Rh6ne River was studied at two time scales in order to test the following hypothesis: fluctuations would occur within seasons (flood disturbances, hydrological fluctuations, phenology) while successions would occur between years. The vegetation was surveyed in 1983, 1988 and 1989 during summer for the interannual investigation, and in spring 1989, summer 1989, winter 1989 and spring 1990 for the seasonal investigation. Terrestrialization, which was observed within the same period in other braided former channels of that river, did not happen here despite the 1989 drought. However, a vegetation zone situated in the upstream part one channel seems to represent some successional trend, resulting in the establishment of Nasturtium officinale and the increasing abundance of Chara vulgaris. In disagreement with the tested hypothesis, only fluctuations are observed at the two temporal scales in the other vegetation zones. The amplitude of cyclic trajectories observed in the seasonal study depends of the degree of hydraulic disturbances (floods, drought) that affects each vegetation zone. The channel that is closer to the river is maintained at a steady state by the periodical inputs of kinetic energy during river overflows and fast floods; the disturbances wash away fine deposits and rejuvenate the vegetation mosaic. In the other former channel that is less disturbed by floods and is characterized by a thick layer of fine sediments, the groundwater inputs from numerous limnocrene springs carry away organic matter and slow down ecological successions. Abbreviations: C.A.: Correspondence Analysis. Species abbreviations used in figures are listed in Table 1. Nomenclature: Corillion, R. 1975. Flore et v6g6tation du massif armoricain: tome IV. Flore des Charophytes (Charac6es) du massif armoricain et des contr6es voisines d'Europe occidentale, Jouve (ed.),

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Macrophyte vegetation of Eastern and North-eastern Bohemia

Cited by 24 publications

References 2 publications

Vegetation of the aquatic and marshland habitats in the Orava region, including the first records of Potametum alpini, Potametum zizii and Ranunculo-Juncetum bulbosi in the territory of Slovakia

Vegetation of the aquatic and marshland habitats in the Orava region, including the first records of Potametum alpini, Potametum zizii and Ranunculo-Juncetum bulbosi in the territory of Slovakia

Groundwater-surface water ecotones at the upstream part of confluences in former river channels

Succession and fluctuation in the aquatic vegetation of two former Rh�ne River channels

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