|
|
Communities of terrestrial nematodes after different approaches to heathland restoration
Radochová, Petra ; Háněl, Ladislav (advisor) ; Tropek, Robert (referee)
Since the 20th century, the distribution of European heathlands rapidly decreased due to agricultural intensification, heavy use of artificial fertilizers or acidification. Therefore, various attempts of heathland restoration are under way in these days. Analysis of nematode community composition can be one of the tools suitable for succession evaluation. In 2011, 2013 and 2014, soil samples were collected from heathland restoration experiment (launched in 2011) where different restoration methods were applied in a 3 × 3 factorial experiment; existing heathlands were also sampled to identify the target community both in dry and wet heathland. A total of 60 samples of extracted nematodes were analysed for absolute abundance, trophic groups, and genera dominance. Various indices were calculated to describe the nematode community. We were able to proove faster development of wet heathlands towards the target community. However, because of large data variability, there was no significant difference between treatments. Development of wet and dry heathlands differed also in increased proportion of omniphagous nematodes in 2013 and predators in 2014 in dry heathlands. After three years of heathland restoration, nematode community has not yet reached parameters of the target community. Key words: Nematoda,...
|
|
|
Biotic interaction and their role in organic matter turnover in soil
Radochová, Petra ; Frouz, Jan (advisor) ; Smrž, Jaroslav (referee)
The thesis brings overview of main taxa of soil organisms. It describes in detail their trophic and non trophic interactions that contribute to organic matter decomposition in soil. In particular soil food web and behavior of fungal and bacterial channel of food web is described in relation to organic matter decomposition, soil formation and humus formation. This work contains also experimental work sealing with interaction of soil microscopic fungi and invertebrates. Food preference and suitability for development of three fungal species growing on three different litter types was studied. Litter was more important for food preference and food suitability. There were disproportion between litter suitability and litter preference. In particular oak was not preferred by adults but very suitable for development.
|
|
|
Communities of terrestrial nematodes after different approaches to heathland restoration
Radochová, Petra ; Háněl, Ladislav (advisor) ; Tropek, Robert (referee)
Since the 20th century, the distribution of European heathlands rapidly decreased due to agricultural intensification, heavy use of artificial fertilizers or acidification. Therefore, various attempts of heathland restoration are under way in these days. Analysis of nematode community composition can be one of the tools suitable for succession evaluation. In 2011, 2013 and 2014, soil samples were collected from heathland restoration experiment (launched in 2011) where different restoration methods were applied in a 3 × 3 factorial experiment; existing heathlands were also sampled to identify the target community both in dry and wet heathland. A total of 60 samples of extracted nematodes were analysed for absolute abundance, trophic groups, and genera dominance. Various indices were calculated to describe the nematode community. We were able to proove faster development of wet heathlands towards the target community. However, because of large data variability, there was no significant difference between treatments. Development of wet and dry heathlands differed also in increased proportion of omniphagous nematodes in 2013 and predators in 2014 in dry heathlands. After three years of heathland restoration, nematode community has not yet reached parameters of the target community. Key words: Nematoda,...
|
|
|
Biotic interaction and their role in organic matter turnover in soil
Radochová, Petra ; Frouz, Jan (advisor) ; Smrž, Jaroslav (referee)
The thesis brings overview of main taxa of soil organisms. It describes in detail their trophic and non trophic interactions that contribute to organic matter decomposition in soil. In particular soil food web and behavior of fungal and bacterial channel of food web is described in relation to organic matter decomposition, soil formation and humus formation. This work contains also experimental work sealing with interaction of soil microscopic fungi and invertebrates. Food preference and suitability for development of three fungal species growing on three different litter types was studied. Litter was more important for food preference and food suitability. There were disproportion between litter suitability and litter preference. In particular oak was not preferred by adults but very suitable for development.
|
guest ::
