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The influence of the site factors related to soil, forest stand and litter as well as to altitude, exposure and slope - on the composition/abundance structure of millipede communities (Diplopoda) was estimated. The research was carried out in 1999 to 2002 in 13 mixed oakhornbeam forest stands in Malé Karpaty Mts. (South-Western Slovakia) ranged from 132 to 768 m a.s.l. In each locality, millipedes were collected by sieving of the litter taken at monthly intervals from 16 quadrates (25  25 cm) in each site. The redundancy analysis was applied. The most apparent influence on the community structure was ascertained for pH-value of litter and age of forest stand. Nitrogen content in litter was the most important factor, influencing the species richness of the millipede assemblages in studied sites.
The influence of altitude on the distribution of harvestmen (Opiliones) and on their species diversity in Slovakia was studied. The data were obtained from the numerous published sources and from the unpublished results of the author’s own research activity. These basic results include the findings of 32 species from 680 localities, located unevenly in all the altitudinal vegetation zones of Slovakia at elevations from 107 to 2100 m a.s.l. The sampling area represents almost all the territory of Slovakia. The harvestmen were collected in a wide scale of various types of indigenous terrestrial biotopes including open land, forest ecosystems, agricultural country and urban habitats. The most of the studied species of harvestmen are distributed in a wide elevation range. The model of the altitudinal trend in the harvestmen species diversity has a shape of the single-peaked curve with the peak between 500 and 600 m a.s.l. The reduced richness of species at lower altitudescould be caused by the intensive agricultural activity in these regions. The range of area altitudinal zones 500–12 000 km2 does not show a significant influence on the species diversity of harvestmen.
Currently, the alternative forms of management are increasingly applied in agriculture. Although their less negative impact on environment is generally supposed, there is still a lack of a reliable data about their real favourability for the abundance and diversity of soil invertebrates, including millipedes. Therefore, the aim of our study was to find out, whether the form of agricultural management affects the structure of millipede communities and hence, the performance of their functions in soil ecosystems. The research was carried out using pitfall trapping through growing seasons 2005 to 2007 on the model territory of Agricultural Cooperative (AC) Očová (Central Slovakia). Millipedes were captured at four pairs of sites (8 sites in total). The same cultivated crop (wheat, barley, alfalfa or permanent law) with application of two different forms of agricultural management (conventional form and sustainable form with basic sustainable agro-environmental scheme) was characteristic of each pair of sites. The research results disclosed that the management form plays a significant role, especially in such agrocoenoses, in which the same crop is cultivated for several years (e.g. sites with alfalfa or permanent lawn), i.e., on the sites without ploughing or other similar agrotechnical measures. In these cases, the sites with the sustainable agro-environmental scheme had higher species richness (8 and 9 species) and higher total abundance of millipede communities (2.2 and 5.7 ind. collected per one day and one trap) than the sites with the conventional form of agrotechnical management (5 and 5 species, 0.09 and 0.3 ind. collected per one day and one trap). In order to obtain a more detailed knowledge about the impact of agricultural management forms on millipede communities, this kind of research should be carried out in different conditions (other crops, soil conditions, climate zones, etc.) as well.
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