Répartition des rotifères dans deux lacs-tourbières du Massif Central (France)

Francez, André-Jean; Dévaux, Jean

doi:10.1007/bf00006823

Cited by 11 publications

(1 citation statement)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Testate amoebae are also commonly the subject of ecological studies due to their well-defined ecological preferences in relation to important ecological variables in peatlands (Charman, 1997). Besides protozoa, rotifers are another very important component of microorganism assemblages in peatland ecosystems, where they also participate in nitrogen and phosphorus cycles (Francez and De´vaux, 1985;Błedzki and Ellison, 2003).…”

Section: Introductionmentioning

confidence: 99%

Diversity and assemblage patterns of microorganisms structured by the groundwater chemistry gradient in spring fens

Křoupalová

Opravilová

Bojková

et al. 2013

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

-We examined the associations of microorganism assemblages with a complete mineral richness gradient spanning from extremely mineral-rich tufa-forming calcareous fens to mineral-poor acidic Sphagnum-fens. We also compared the distribution of two dominant taxa, testate amoebae and monogonont rotifers, among the sites differing in water chemistry and among three microhabitats sampled at each site differing in substrate and moisture conditions. Microorganism assemblages primarily changed in relation to the mineral richness gradient; moisture was the second most important factor structuring microorganism assemblages among microhabitats (i.e., wet bryophytes, submerged bryophytes and waterlogged bottom sediments). Densities of testate amoebae taxa and individuals were the highest in rich Sphagnum-fens, indicating a unimodal pattern along the mineral richness gradient. Numbers of testate amoebae taxa decreased notably in wet bryophytes, especially in poor Sphagnum-fens. This pattern might result from a strong effect of Sphagnum acidification due to minimal or no dilution of the acidic environment by mineral-rich groundwater. As a consequence, acid tolerant and relatively xerophilous taxa chiefly dominated in wet bryophytes of poor Sphagnum-fens, while poor Sphagnum-fen bottom sediments could provide a refuge for less tolerant and hydrophilous species. In contrast to testate amoebae, monogonont rotifers preferred bryophytes in all sites, with the number of monogonont taxa distinctly increasing from calcareous fens to poor Sphagnum-fens. In poor Sphagnum-fens, monogononts were the most abundant in wet bryophytes, probably due to reduced food competition and/or predaceous pressure resulting from the limited occurrence of other groups of microorganisms by virtue of the hostile acidic conditions in wet Sphagnum carpets.

show abstract

Section: Introductionmentioning

confidence: 99%

Diversity and assemblage patterns of microorganisms structured by the groundwater chemistry gradient in spring fens

Křoupalová

Opravilová

Bojková

et al. 2013

Ann. Limnol. - Int. J. Lim.

View full text Add to dashboard Cite

show abstract

Epiphytic Rotifer Abundance and Diversity in Moss Patches in Bogs and Fens in the Polesie National Park (Eastern Poland)

Bielańska-Grajner

Cudak

Mieczan

2011

International Review of Hydrobiology

View full text Add to dashboard Cite

Moss-inhabiting rotifers were studied in 2 raised bogs, 2 poor fens (i.e. intermediate between raised bogs and typical fens), 1 typical fen, and 1 base-rich fen, located in the Polesie National Park (eastern Poland). Moss samples were collected from April till November 2007 in monthly intervals. In total, 42 taxa of Monogononta and 26 of Bdelloidea were found. Analysis of variance (ANOVA) detected highly significant differences between the habitats in conductivity (F = 37.19, P < 0.001), total organic content (F = 9.34, P < 0.001), total P (F = 51.71, P < 0.001), and nitrate N (F = 48.98, P < 0.001). The mean density of rotifers was the highest in a bog dominated by Sphagnum angustifolium JENSEN (Durne Bagno), and the lowest in the base-rich fen (Bubnów). In all the studied habitats, the Bdelloidea were the most abundant, accounting for 56 to 85% of the total rotifer density. Canonical correspondence analysis (CCA), made for selected physicochemical parameters and taxa, confirms strong relationships between abiotic conditions and selected rotifer taxa: Habrotrocha angusticolis, Dicranophorus capucinus, Ke ratella serrulata, and Lepadella elliptica. IntroductionPeatlands are systems composed of peat deposits and the specific vegetation that covers them (RADWAN, 2002). Various types of peatlands are distinguished depending on hydrological conditions, pH, nutrient concentrations, as well as vegetation type (BRINGHAM et al., 1996). Those habitats are characterized by continuous changes in environmental conditions, such as pH, temperature, and oxygen content (RADWAN, 1974). Low pH, concentrations of nutrients, and temperature, as well as oxygen deficits, make the environment of Sphagnum mats extremely unfavourable for many organisms ( VAN BREEMAN, 1995). In spite of the harsh environmental conditions in bogs and peatland ecosystems, rotifers are able to live in them. Several authors believe that low values of pH (below 5) greatly limit the distribution and abundance of many rotifer species (RADWAN, 1984;BERZINS and PEJLER, 1987). However, a large number of rotifer species show a broad range of pH tolerance and some bdelloid species are tolerant to a very broad pH spectrum (BERZINS and PEJLER, 1987). Another factor that limits the distribution of organisms in peatlands is the availability of water (MITCHELL et al., 2003). However, Sphagnum mats are able to store large amounts of water, so they create favourable living conditions for rotifers (BŁĘDZKI and ELLISON, 2003). Rotifers are most abundant in moss (SAYRE and BRUNSON, 1971), and that is why they are an excellent tool for epiphyton research in peatland ecosystems.There are many publications on rotifer diversity in lakes, ponds, artificial water bodies, and running waters, but few studies on rotifers in other aquatic habitats (FONTANETO et al., 2005). Particularly little is known about moss-dwelling rotifers in peatlands (BŁĘDZKI and ELLISON, 2003;BATEMAN and DAVIS, 1980). Many more studies have concerned aquatic habitats closely related to peatlands, i.e....

show abstract

On choice of substrate and habitat in brachionid rotifers

Pejler¹,

Bērziņš²

1989

Rotifer Symposium V

View full text Add to dashboard Cite

Répartition des rotifères dans deux lacs-tourbières du Massif Central (France)

Cited by 11 publications

References 2 publications

Diversity and assemblage patterns of microorganisms structured by the groundwater chemistry gradient in spring fens

Diversity and assemblage patterns of microorganisms structured by the groundwater chemistry gradient in spring fens

Epiphytic Rotifer Abundance and Diversity in Moss Patches in Bogs and Fens in the Polesie National Park (Eastern Poland)

On choice of substrate and habitat in brachionid rotifers

Contact Info

Product

Resources

About