Hydrostatischer Druck, Licht und submerse Vegetation im Vrana‐See

Golubić, Stjepko

doi:10.1002/iroh.19630480102

Cited by 14 publications

(3 citation statements)

References 5 publications

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“…Although this depth is impressive, it is not the highest ever reported for this species. Indeed, a maximum growing depth of 37 meters for Nitella opaca has previously been reported in Lake Vrana (Golubić, 1963), of 33 meters in Lake Thingvallavatn (Kairesalo et al 1992) and of 27 meters in Lake Towada (Jimbo et al, 1955). In IVL, Nitella opaca and Chara globularis were the commonest species at high depths, as is generally reported in the northern hemisphere (Kairesalo et al, 1992;Frantz and Cordone, 1967).…”

Section: Resultsmentioning

confidence: 88%

Italian Volcanic lakes: a diversity hotspot and refuge for European charophytes

Azzella

2014

J Limnol

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Macrophytes are one of the most important components of primary producers in lacustrine environments. Charophytes represent the most threatened group of macrophytes and are included in many European Red-Lists. Thus, finding and preserving charophyte diversity hotspots is important for European macrophyte conservation strategies. Within the framework of a general project aimed at investigating aquatic plant diversity of Italian volcanic lakes (IVL), a field survey carried out in 2009-2010 recognized high charophyte diversity. Overall, 17 species of charophytes, which correspond to 50% of Italian stoneworts and 30% of the European species, were recorded. Nevertheless, only four IVL out of the nine lakes investigated can be considered Chara-dominated lakes. Three Chara-vegetation belts characterized the Chara dominated IVL, as in other pristine deep calcareous European lakes. A Chara aspera belt grew at a lower depth, followed by a Chara polyacantha belt at a medium depth and a Chara globularis dominated belt at a higher depth, up to the maximum growing depth. The most common species was Chara globularis, whereas seven species were rare. Sixteen of the 17 species found belong to the IUCN threatened categories throughout Europe. The most interesting taxa are Nitella hyalina, Nitella gracilis and Lychnothamnus barbatus. Nitella hyalina is extinct in Switzerland and Great Britain, critically endangered in the Balkans and in Germany. Nitella gracilis is extinct in Denmark and endangered in the Balkans, Sweden and Switzerland. The Lychnothamnus barbatus population found in Martignano is the only one known in Italy. Lakes Vico, Martignano, Bolsena and Bracciano host from 18% to 44% of European charophytes. The high number of species in each lake allows the selection of these lakes as European hotspots of charophyte diversity. Therefore, the IVL can be a reference system for the conservation of aquatic species that are typical of Italian and European deep lakes.

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Section: Resultsmentioning

confidence: 88%

Italian Volcanic lakes: a diversity hotspot and refuge for European charophytes

Azzella

2014

J Limnol

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“…A previous experiment (Titus and Adams unpublished) with six replicates of three tips each incubated under the same conditions yielded a coefficient of variability among carbon uptake rates of 14.5%. Ruttner (1926) and Golubic ( 1963) performed similar cxperiments on M. spicatum but not within natural communities.…”

Section: Methodsmentioning

confidence: 84%

Depth distribution of photosynthetic activity in a Myriophyllum, spicatum community in Lake Wingra1

Adams¹,

Titus²,

McCracken³

1974

Limnology & Oceanography

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“…Otros autores han atribuido un papel importante a la temperatura puesto que en algunos casos el límite de profundidad a que crecen las fanerógamas coincide con el de máxima penetración de la termoclina (Sheldon & Boylen, 1977). Pero, en muchos otros n o ocurre así (GolubiC, 1963;Hutchinson, 1975;Bodkin et al, 1980).…”

Section: Introducclonunclassified

Influencia de la presión, luz y temperatura sobre la producción de micrófitos en periodos cortos. problemas metodológicos de la técnica del oxigeno

Peñuelas¹

1987

Limnetica

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Higher plants are not found below 8-10 m depth in lakes. Hydrostatic pressure appears to be a plaussible determinant of this limitation because in many cases there are light intensities above compensation points further below 8-10 m depth. Bryophytes and algae are found much deeper. It has been studied the effect of hydrostatic pressure, light and temperature on macrophyte (a bryophyte, an alga and a higher plant) production during short periods (1 day).in an experimental system that enables the control of these parameters. Oxygen technique and pH measurement have been used.Results do not show any significant effect of pressure. Optimum temperature descends at low light intensities. Oxygen techinique deficiencies in these experiments are discussed. The high oxygen partial pressure in aenal spaces in thought to be the cause of inviability of higher plants at depths below 10 m.

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Hydrostatischer Druck, Licht und submerse Vegetation im Vrana‐See

Cited by 14 publications

References 5 publications

Italian Volcanic lakes: a diversity hotspot and refuge for European charophytes

Italian Volcanic lakes: a diversity hotspot and refuge for European charophytes

Depth distribution of photosynthetic activity in a Myriophyllum, spicatum community in Lake Wingra1

Influencia de la presión, luz y temperatura sobre la producción de micrófitos en periodos cortos. problemas metodológicos de la técnica del oxigeno

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