Biodiversity and ecology of algae in mountain bogs (Bohemian Forest, Central Europe)

Lederer, Filip; Soukupová, Lenka

doi:10.1127/algol_stud/106/2002/151

Cited by 9 publications

(2 citation statements)

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“…The most conspicuous differences in shoot nutrient characteristics were found in S. cuspidatum submerged in pools (2005) and occupying wet hollows (2006). Submerged form of this species hosted a rich algal microflora (Lederer and Soukupova´2002), which can significantly increase N input by cyanobacterial N fixation, particularly in the given microhabitat (Granhall and Selander 1973). The smallest interspecific differences in nutrient characteristics of the shoots were found in hummocks and also in hollows which were dominated by species pairs of closely related species belonging to the sections Acutifolia (hummocks) and Cuspidata (hollows).…”

Section: Species and Habitat Controls On Shoot Nutrient Contentmentioning

confidence: 99%

Mineral nutrient economy in competing species of Sphagnum mosses

Hájek

Adamec

2008

Ecological Research

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Bog vegetation, which is dominated by Sphagnum mosses, depends exclusively on aerial deposition of mineral nutrients. We studied how the main mineral nutrients are distributed between intracellular and extracellular exchangeable fractions and along the vertical physiological gradient of shoot age in seven Sphagnum species occupying contrasting bog microhabitats. While the Sphagnum exchangeable cation content decreased generally in the order Ca 2+ ‡ K + , Na + , Mg 2+ > Al 3+ > NH 4 + , intracellular element content decreased in the order N > K > Na, Mg, P, Ca, Al. Calcium occurred mainly in the exchangeable form while Mg, Na and particularly K, Al and N occurred inside cells. Hummock species with a higher cation exchange capacity (CEC) accumulated more exchangeable Ca 2+ , while the hollow species with a lower CEC accumulated more exchangeable Na + , particularly in dead shoot segments. Intracellular N and P, but not metallic elements, were consistently lower in dead shoot segments, indicating the possibility of N and P reutilization from senescing segments. The greatest variation in tissue nutrient content and distribution was between species from contrasting microhabitats. The greatest variation within microhabitats was between the dissimilar species S. angustifolium and S. magellanicum. The latter species had the intracellular N content about 40% lower than other species, including even this species when grown alone. This indicates unequal competition for N, which can lead to outcompeting of S. magellanicum from mixed patches. We assume that efficient cation exchange enables Sphagnum vegetation to retain immediately the cationic nutrients from rainwater. This may represent an important mechanism of temporal extension of mineral nutrient availability to subsequent slow intracellular nutrient uptake.

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Section: Species and Habitat Controls On Shoot Nutrient Contentmentioning

confidence: 99%

Mineral nutrient economy in competing species of Sphagnum mosses

Hájek

Adamec

2008

Ecological Research

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“…An inconspicuous, but probably very rare species, the occurrence of which in the Czech Republic is mentioned by LütKemüLLer (1910), fischer (1924) and Lederer & souKuPová (2002). When observed in frontal view, some specimens seem to have several warts directly under the apex; however, these are probably just rough pores (see also Kouwets 1987).…”

Section: Xanthidium Concinnum Warcher (Figs 276-277)mentioning

confidence: 99%

Desmids (Conjugatophyceae, Viridiplantae) from the Czech Republic; new and rare taxa, distribution, ecology.

Šťastný¹

2010

Fottea

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The present work summarizes the current diversity, distribution and autecology of desmids found within the Czech Republic; the focus is on the occurrence and autecology of rare taxa. Data are based on the author's extensive sampling from 2003-2009, during work for both his master's degree, and currently, his Ph.D. dissertation. Over 1 400 samples were collected, from various types of wetland habitats ranging from eutrophic fishponds, diverse bogs and fens, to ephemeral pools and various aerophytic habitats. Altogether, 526 taxa of desmids (401 species) belonging to 27 genera were found, 80 of them newly described in the Czech Republic. In the present work, 169 rare or otherwise noteworthy taxa, belonging to the following genera: Mesotaenium (1), Netrium (1), Roya (2), Tortitaenia (1), Gonatozygon (2), Closterium (14), Haplotaenium (2), Pleurotaenium (3), Docidium (1), Actinotaenium (6), Euastrum (9), Micrasterias (7), Cosmarium (78), Xanthidium (7), Staurodesmus (4), Staurastrum (25), Cosmocladium (2), Sphaerozosma (2), Hyalotheca (1) and Desmidium (1) are depicted by line drawings and briefly discussed with regard to their ecology, taxonomy or distribution within the Czech Republic or Central Europe. In addition, SEM images are provided for 45 taxa, and, finally, a comprehensive table is included with indicative notations concerning all taxa found.

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