|
|
Seasonal development and vertical distribution of soil rotifer populations in South-Bohemian beech forest
Devetter, Miloslav
The soil rotifer community in a climax beech forest in South Bohemia was investigated during 2005 focusing on seasonal and vertical distribution changes. Samples 10 cm.sup.2./sup. large and 10 cm in depth were divided into 5 layers, which were processed separately. Altogether 31 rotifer species were determined during the investigation, of these 9 species were monogononts, while the rest were bdelloids. The most important species were .i.Encentrum arvicola, Wierzejskiella vagneri./i. among the monogononts and .i.Adineta steineri, Ceratotrocha cornigera, Habrotrocha filum, H. ligula, Macrotrachela plicata, Mniobia tentans, M. incrassata, M. granulosa./i. among the bdelloids. Mean Shannon diversity index varied from 1.99 to 2.63. Total rotifer abundance varied from 212 (± 63) to 513 (± 127) 10.sup.3./sup. ind. m.sup.-2./sup. year-round, with the highest numbers found in May, while the lowest were in July.
|
|
|
Primární sukcese společenstev půdních vířníků na výsypkách po těžbě hnědého uhlí
Devetter, Miloslav
The changes of rotifer soil communities along primary succession chronosequence was studied on brown coal post mining areas near Sokolov, NW part of the Czech Republic. The age of successional stages was 2, 11, 14, 20, 43 years. The rotifers were extracted from soil samples using modified method of Baermann funnel with combined light and temperature gradients. In total, 17 taxa of soil rotifers were identified throughout the study. Most common species were .i.Adineta vaga, Habrotrocha rosa, Macrotrachela quadricornifera./i.. The important were also .i.Encentrum arvicola, Habrotrocha elegans, Macrotrachela nana./i.. Total densities varied from tens to hundreds thousands individuals per m.sup.2./sup. and increased with the increasing age of the plot. Depressions of the surface relief hosted higher numbers of rotifers than elevations, but elevations were more rich in species. The species succession on chronosequence is well demonstrated in the genus .i.Encentrum./i..
|
guest ::
