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On two monitoring areas of the Central Institute for Supervising and Testing in Agriculture (ÚKZÚZ) loaded with risk elements we carried out investigations of beetles of the family Carabidae (Coleoptera) in agricultural stands of winter and spring wheat. The focus of the present study is on synecological characteristics and in some extent on the impact of agricultural practise on the population and seasonal dynamics of the most important representatives of ground beetles. This paper precedes the following article aimed to contents of heavy metals in ground beetles.

Stigmella stettinensis (Heinemann, 1871) is separated from a widely distributed Stigmella minusculella (Herrich-Schäffer, 1855) - a miner of pear-tree. The two species differ in colouration, in number of antennal segments and in some genitalia structures. The caterpillar of Stigmella stettinensis mines also leaves of Pyrus spp. Important characters are figured, problems of nomenclature are discussed, neotypes of the both taxa are fixed.

Recent agricultural policy and trade discussions have given increasing attention to "multifunctionality", the notion, that agriculture provides multiple outputs that include public goods (such as landscape amenities) as well as privately traded commodities. A frequent point of contention is also whether payment for the provision of non-commodity outputs distorts trade by giving domestic farmers a competitive advantage over foreign competitors. The paper reviews some requirements for environmental policy design and the role of property rights for the justification of the development of compensation programs targeted to landscape protection. The second part of the paper illustrates the possibilities, how to use results of Contingent Valuation (CV) study of landscape amenity benefits of agriculture to prove eligibility for agri-environmental payments in the case of the Protected Landscape Area White Carpathians (Bílé Karpaty). It is documented in the paper, that Contingent Valuation can provide useful information about genuine concern and overall efficiency of compensation programs as well as people's views about alternative ethical ends, besides human well-being, that policy makers should take in consideration.

Since 1955 as yet in the territory of the Czech Republic in 4 species of the genus Apodemus (namely A. flavicollis, A. sylvaticus, A. microps and A. agrarius), 49 species of parasitic worms were registered in total. At their revision, comparing with the modern literature from the last five decades, the author has approached to several corrections. Subjects are, first of all, several opinions on the species from the genera Plagiorchis, Echinostoma, Aprostatandrya, Catenotaenia, Hymenolepis, Syphacia, Heligmosomum, Heligmosomoides, Ganguleterakis and Aonchotheca. Of highly characteristic helminths parasitizing Apodemus spp. in Czech Republic, they are from the class Trematoda: Brachylaemus recurvus; from the class Cestoda: Paranoplocephala omphalodes, Skrjabinotaenia lobata, Catenotaenia sp., Hymenolepis straminea; from the class Nematoda: Syphacia stroma, S. frederici, S. agraria, Heligmosomum pseudocostellatum, Heligmosomoides polygyrus, Aonchotheca murissylvatici, Calodium hepaticum, Trichocephalus muris; from the class Acanthocephala: Moniliformis moniliformis. A number of species has to be verified, in a future, by methods of molecular biology.

Performed is the analysis of the hitherto findings of Nematoda from the genus Heligmosomum Railliet et Henry, 1909 in Japan. It is stated that in Japan the members of two subgenera, namely Heligmosomum and Paraheligmosomum parasitize rodents. They are the following species: H. (H.) costellatum (Dujardin, 1845), H. (P.) hasegawai Asakawa, 1987, H. (P.) yamagutii Chabaud, Rausch, Durette-Desset, 1963, H. (P.) asakawai N'Zobadila, Boyer, Durette-Desset, 1996, Heligmosomum (P.) mixtum Schulz, 1954, Heligmosomum (P.) sp. Asakawa, 1995. The key for determination of all above species is established.

Phytoplankton communities of three water bodies in the Lednice park were studied from 22nd April till 1st October 2002. These water bodies are the Zámecký pond, Růžový pond and the Dyje River, which is water source of both ponds.
Phytoplankton samples were taken every two weeks between 8 - 9 am. Collected phytoplankton samples were preserved with 4% formalin solution and Lugol solution (JJK) and transported to the laboratory. They were determined and counted using inverted microscope. Water temperature, pH and dissolved oxygen were measured in the field using digital portable instruments. Total of 317 phytoplankton species were determined in this study.
Heavy algal bloom was observed in the Zámecký pond in mid-summer coinciding with increase in water temperature. Fish diseases and partial mortality occurred during the period of algal bloom and unpleasant smell was dominant feature. A light algal bloom was also observed in the Růžový pond and the Dyje River nearly by the end of summer.
The main algae species responsible for blue-green algae bloom were Anabaena flos-aquae, Microcystis aeruginosa, M. ichtyoblabe, M. flos-aquae and M. wesenbergii. Dissolved oxygen values varied between 3.4 - 19.5 mg l^-1, pH ranged from 7.6 - 9.7. Secchi depth varied from 0-65 cm in the Zámecký pond, 15-45 cm in the Růžový pond and 35-65 cm in the Dyje River. Concentration of total phosphate, nitrate and chlorophyll-a in the Dyje River before drainage into the Zámecký and Růžový pond verified heavy nutrient load (Total-P = 0.3, NO₃^- = 12 mg.l^-1) of the river. Although the Dyje River is main water source for both ponds, presence of relatively different phytoplankton communities in these two ponds suggest that probably different nutrient sources might be responsible for differences in phytoplankton communities and eutrophication patterns in the Zámecký pond as compared to the Růžový pond.