0105470 - UPB-H 20043075 RIV FR eng J - Journal Article
Hubert, J. - Šustr, Vladimír - Pekár, S.
Estimation of seasonal changes of population feeding activity of the oribatid mite Galumna elimata (Acari: Oribatida).
[Odhad sezónních změn populační potravní aktivity pancířníka Galumna elimata (Acari: Oribatida).]
Acarologia. Roč. 44, 3-4 (2004), s. 253-260. ISSN 0044-586X. E-ISSN 2107-7207
Grant - others:GA MZe1 MZE-000-2700603
Institutional research plan: CEZ:AV0Z6066911
Keywords : Oribatida * Galumna * defecation
Subject RIV: EH - Ecology, Behaviour

The abundance of oribatids in natural biotopes in the temperate region is characterised by two peaks, in spring and in autumn. We tested, whether these abundance peaks are accompanied by high feeding activity of Galumna elimata population. The defecation was used as an indirect estimation of the feeding activity. The model of seasonal changes of population defecation activity was constructed. Temperature dependence of defecation measured previously in laboratory and Galumna abundance data from 4 meadow plots in Central Bohemia were used for the model. The mites were sampled monthly from 1992 to 1993. The monthly defecation per Galumna population on each plot was adjusted to mean monthly temperatures and to mean monthly abundance. The estimated maximal population faecal pellets production was not correlated to the abundance peaks on three from four plots. The model showed that mites defecated particularly from May to September. In the autumn, when abundance was high, negligible defecation was found. The model of seasonal changes indicates that oribatid defecation may influence activity of microorganisms mainly in late spring and in summer

Početnost pancířníků v přírodních biotopech se vyznačuje dvěma maximy na jaře a na podzim. Bylo testováno, zda tato maxima doprovází vysoká potravní aktivita populace Galumna elimata. Jako nepřímé kritérium potravní aktivity byla použita defekace. Byl sestaven model sezónních změn defekace populace. Zjištěná maxima defekace populace nekorelují s maximální početností. Model ukazuje, že produkce exkrementů pancířníky může ovlivňovat aktivitu půdních mikroorganismů hlavně v pozdním jaru a v létě
Permanent Link: http://hdl.handle.net/11104/0012713