Quantitative and qualitative changes of phenolic compounds in alder leaf litter
Elhottová, Dana; Vrchotová, Naděžda; Tříska, Jan; Krištůfek, Václav
2001 - English
Quantitative as well as qualitative changes of phenolic compounds were investigated in different decomposition stages (I-IV) of native alder leaf litter. The Folin-Ciocalteau method was applied for the determination of total phenolic compounds and the reserved phase HPLC for the determination of the phenolic acids. Both values decreased in dependence on stage of litter decomposition. The reduction of the total phenolic compounds and the phenolic acids was 20% and 50%, respectively, in the most decomposed litter (stage IV) in comparison with fresh litter (stage I, 100%). The ratio of free (simple extracted) and bound phenolic compounds (extracted after acid hydrolysis) in the group of total phenolic compounds and phenolic acids was determined. The characteristic feature of the fresh litter (stage I) was higher amount of the free phenolic acids as well as higher ratio of the free phenolic compounds to the bound ones. The following stage II was characterised by two times higher portion of free to bound total phenolic compounds in contrary to phenolic acids where the bound acids dominat ed over the free ones. Higher level of bound to free compounds in both observed phenolic groups was typical for the most decomposed litter samples (stage III and IV).In addition, the stage III and IV were characterised by new compounds, which were formed in the litter during its decomposition and were not detectable in the previous stages (I,II).
Keywords:
biological degradation; total phenolic compounds; decomposition
Available at various institutes of the ASCR
Quantitative and qualitative changes of phenolic compounds in alder leaf litter
Quantitative as well as qualitative changes of phenolic compounds were investigated in different decomposition stages (I-IV) of native alder leaf litter. The Folin-Ciocalteau method was applied for ...
B.1. Nesyt
Bubík, M.; Balík, Vladimír; Kopecký, J.
2001 - English
Wetland near the western margin of the Nesyt Lake is the most important and one of the last salt meadows of south Moravia. Many taxa of halophyte plants and halophilous insects have there the only locality within Czech Republic. Sulphates and chlorides in soil come from Miocene sediments with primary marine salt mineralization. The area of salt meadows is State protected as National Nature Reserve "Slanisko u Nesytu". Recently in the incidentally take sample from surface of filled part of lake frequent agglutinated forminifer Haplophragmoides wilberti Andersen were found. Also some other samples taken later near the western margin of the Nesyt Lake were positive. This is the first find of modern foraminifer fauna in the territory of Czech Republic. Similar find reported Bartenstein (1939) from salt ponds from vicinity of Erfurt, Germany. He assigned his find to Haplophragmoides canariensis. His figure shows, nevertheless very similar forms.
Keywords:
Nesyt Lake; salt meadows
Available at various institutes of the ASCR
B.1. Nesyt
Wetland near the western margin of the Nesyt Lake is the most important and one of the last salt meadows of south Moravia. Many taxa of halophyte plants and halophilous insects have there the only ...
Changes in terrestrial chironomid (Diptera: Chironomidae) community after soil drainage
Frouz, Jan
2000 - English
Communities of terrestrial chironomids, both larvae and adults were studied in four seminatural and three drained meadows in South Bohemia during two years.Multivariate analysis indicated that changes in organic matter content and water level were the most important environmental variabkles affecting comunity change after drainage.
Available at various institutes of the ASCR
Changes in terrestrial chironomid (Diptera: Chironomidae) community after soil drainage
Communities of terrestrial chironomids, both larvae and adults were studied in four seminatural and three drained meadows in South Bohemia during two years.Multivariate analysis indicated that changes ...
Soil Cyano bacteria - a source of polyunsaturated fatty acids in soil food chains
Elhottová, Dana; Tříska, Jan; Lukešová, Alena
2000 - English
The objective of this study was to describe the phospholipid FAs composition of soil cyanobacteria representatives and to determine the relative content of PUFAs in samples.The results indicates that the soil cyanobacteria could serve as a source of essential PUFAs for the soil invertebrates.
Available at various institutes of the ASCR
Soil Cyano bacteria - a source of polyunsaturated fatty acids in soil food chains
The objective of this study was to describe the phospholipid FAs composition of soil cyanobacteria representatives and to determine the relative content of PUFAs in samples.The results indicates that ...
Changes in communities of staphylinid beetles (Coleoptera, Staphylinidae) during secondary succession in abandoned fields
Boháč, J.; Jedlička, P.; Frouz, Jan
1999 - English
Available at various institutes of the ASCR
Changes in communities of staphylinid beetles (Coleoptera, Staphylinidae) during secondary succession in abandoned fields
The effect of feeding of bibionid larvae on composition of litter microfungal community
Nováková, Alena; Frouz, Jan
1999 - English
Available at various institutes of the ASCR
The effect of feeding of bibionid larvae on composition of litter microfungal community
Adult migration of soil dwelling Diptera with respect to vegetation cover, succession age and larval breeding sites - preliminary results
Frouz, Jan
1999 - English
Available at various institutes of the ASCR
Adult migration of soil dwelling Diptera with respect to vegetation cover, succession age and larval breeding sites - preliminary results
Microdistribution of soil nematodes (Nematoda) in a climax spruce forest at Žofín National Natural Reserve, Czech Republic
Háněl, Ladislav
1999 - English
Available at various institutes of the ASCR
Microdistribution of soil nematodes (Nematoda) in a climax spruce forest at Žofín National Natural Reserve, Czech Republic
Spiders (Aranea) in alder plantations of various age on heaps after brown coal mining
Holec, Michal
1999 - English
Available at various institutes of the ASCR
Spiders (Aranea) in alder plantations of various age on heaps after brown coal mining
Collembolan succession on afforested colliery spoil heaps in two contrasting post - mining landscapes
Materna, Jan
1999 - English
Available at various institutes of the ASCR
Collembolan succession on afforested colliery spoil heaps in two contrasting post - mining landscapes
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