|
|
Collembola, Protura and Pauropoda in a riparian forest - mesic forest
Rusek, Josef ; Reithofer, D. ; Schmid, S. ; Truxa, Ch. ; Weber, J. ; Wilde, U.
Communities of soil Collembola, Protura and Pauropoda were studied in a riparian forest - mesic forest ecotone in the Stromovka Park in the inundation zone of the Vltava River in České Budějovice, South Bohemia, Czech Republic. Ten soil samples, each 10 cm.sup.2./sup. and 5 cm deep, were taken on April 3rd, 2000 in each of five parallel rows from the swampy part without water (row I). Row II was 1 m to the east from row I in a dense .i.Pragmites communis./i. uderstory of the .i.Populus canadensis, Quercus robus./i. dominated riparian forest. Row III was 5 m to the east with the same understory composition, and IV was 10 m further to the east with less dense .i.Phragmites./i. understory growth mixed with grasses and .i.Geranium silvaticum./i. and other understory herbs and poplar and oak litter on the soil surface. Row V was 5 m from row IV in a mesic forest with .i.Quercus robur, Betula alba./i. trees and grass with mosses in understory.
|
|
|
Nová klasifikace životních forem Collembola a Protura
Rusek, Josef
A new classification of Collembola and Protura life forms is proposed. Each eco-morphological life form group is morphologically and ecologically characterized, allowing Collembola to be classified into two main groups: A - atmobionts, and B - edaphobionts. Group A comprises four subgroups: a) macrophytobionts, b) microphytobionts, c) xylobionts, and d) neustons. Group B is divided into three subgroups: a) epigeonts, b) hemiedaphobionts, and c) euedaphobionts. Hemiedaphobionts comprise two subclasses according to their size and occurrence in the soil profile. Euedaphobionts are divided into three classes (large, medium, small) and six subclasses according to presence or reduction of the furca (with furca versus furca missing or reduced). Protura belong to the medium and small size subclasses of euedaphobionts. Former life form systems of Collembola are discussed. The proposed system facilitates the use of Collembola in a more comprehensive way for ecological studies.
|
|
|
Potential natural vegetation of the model transect in Třeboň basin (South Bohemia, Czech Republic)
Boublík, Karel
The paper deals with preliminary results of reconstruction vegetation mapping based on geobiocoenological principles (soil, climatic and growth conditions) and published palynological studies from the study area. On the basis of occurrences and growth features of climax trees (especially Fagus sylvatica and Abies alba) and published palynological studies, I suppose lower potential occurrence of Pinus sylvestris and Quercus robur in contrary to existing reconstruction maps (maps of reconstructed natural vegetation, potential natural vegetation and forest site maps). In these maps, proportion of Fagus sylvatica is probably underestimated. I assume potential occurrence of beech forests or forests with a great proportion of beech also on dystric cambisols and podzols developed from gravel sand of pleistocene alluvial terraces or on pseudogleys.
|
|
|
Palaeoreconstruction of environment, diet, medicine plants, diseases, hygiene etc. for archeological aims for the Medieval time, ev. for the other periods
Jankovská, Vlasta
Palaeoreconstruction of environment, diet, medicine plants, diseases, hygiene etc. for archeological aims for the Medieval time, ev. for the other periods.
|
|
|
Late Silurian Conodont Faunas from Barrandian - selected problems
Carls, P. ; Slavík, Ladislav ; Valenzuela-Ríos, J. I.
Working on biostratigraphy of the late Silurian and of the early Devonian by means of conodont successions from Bohemia and other regions, we realize that the relevant modern literature conveys several problematic opinions and practices of identification and zonation. Silurian/Devonian boundary and adjacent strata, conodonts have been and still are important biostratigraphic tools. However, the more intense the work with them was, the more frequently mischief with their application happened. Many important taxa have been lumped; it affected negatively the precision of stratigraphic correlation. The conodont stratigraphy of late Silurian-early Devonian urgently needs revision.
|
|
|
Testate amoebae (Protozoa) in soils of restored flowery meadows in the Bílé Karpaty Mts. (Czech Republic)
Balík, Vladimír
Soil testate amoebae assemblages were studied in the years 1999-2000 on six differently managed plots in the Bílé Karpaty Mts., South Moravia, Czech Republic. Four experimental plots with different plant cover established on the abandoned field and one conventionally cultivated field plot were investigated at the locality Výzkum. The plot with natural flowery meadow (control plot) was studied at the locality Čertoryje. 25 testate amoebae species were found in all five plots studied on the locality Výzkum. The testate amoebae assemblages were dominated by Cyclopyxis eurystoma var. parvula in 1999 and by Plagiopyxis declivis in 2000. The main coenological parameters increased rapidly during the observed years except for the cultivated field. On the control plot at the Čertoryje locality, 26 testate amoebae species were recorded. The testate amoebae assemblage on this plot was typical for the dry meadows of the warmer areas and was dominated by the Plagiopyxis declivis, Euglypha laevis and Trinema lineare. Values of the coenological parameters studied were typical for such type of habitat. Based on the obtained results, there was evident that the testate amoebae assemblages on experimental plots at the locality Výzkum developed very rapidly and their development tend to the composition characteristic for the old flowery meadows in the Bílé Karpaty Mts. No significant differences in the parameters of the testate amoebae assemblage were established among individual differently managed experimental plots, which situation probably reflects the short period of investigation.
|
|
| |
|
|
Abundance of the barbel, Barbus barbus in the river Jihlava
Peňáz, Milan ; Pivnička, K. ; Prokeš, Miroslav ; Baruš, Vlastimil
A four-year experiment with a total of 993 individually tagged barbel, Barbus barbus, resulted in the assessment of survival and abundance. The Jolly-Seber method was used to estimate abundance from autumn 1999 to spring 2001 (minimum 233, maximum 563 ind./ha). The mean annual survival rate was 0.862, but the partial values assessed separately for seasons (spring - autumn and autumn - spring) differed considerably and the possible reasons for this phenomenon are discussed. On the basis of known survival rate, the abundance was subsequently estimated (for the entire studied stretch and per hectare) using the Petersen capture-recapture method for the period spring 1999 to autumn 2001. Its mean values reached 303 +- 110 ind./ha (minimum 195, maximum 498 ind./ha). These results were in autumn 2001 supported by another simultaneously conducted census following the removal method by Zippin (316 ind./ha).
|
|
| |
|
|
Distribution and estimation of abundance of hazel grouse (Bonasa bonasia) in the Jeseníky Mts. and Rychlebské hory Mts
Koubek, Petr ; Novotný, L. ; Červený, Jaroslav
Hazel grouse (Bonasa bonasia) is the most abundant living galliform bird in the Jeseníky Mts. Since 1984, changes of its abundance, data on biotop preference, amount of chickens and food composition have been followed.The study area is composed of the eastern slopes of Pradid Mt. up to Vrbno pod Pradidem (about 3000 ha). Data about its distribution and abundance in the entire area of Hrubý and Nízký Jeseník Mts. and also Rychlebské hory Mts. (districts Šumperk, Bruntál, Jeseník) were gathered by questionaires in individual hunting grounds where the occurrence of hazel grouse is regular but also in hunting grounds where the occurrence may be assumed.
|
guest ::
