Marisia - Maros Megyei Múzeum Évkönyve 29-30/2. (2010)
Zoology
SOME INVERTEBRATES IN ARABLE FIELDS FROM THE REPUBLIC OF MOLDOVA Svetlana BACAL, Galina BU$MACHIU Institutul de Zoologie al Academiei de §tiinte a Moldovei, str. Academiei nr. 1, 2028 Chisinau, Republica Moldova Abstract: This paper presents the taxonomical and ecological data on some invertebrates from two arable fields: alfalfa and winter wheat. For the first time in the Republic of Moldova 20 species of Collembola from 17 genera and 7 families (Hypogastruridae, Onychiuridae, Isotomidae, Entomobryidae, Sminthurididae, Katiannidae and Sminthuridae) from alfalfa field were registered. In the same culture 36 species of Coleoptera from 20 genera and 7 families (Carabidae, Silphidae, Scarabaeidae, Coccinelidae, Tenebrionidae, Trogidae and Cerambycidae) have been identified. In the winter wheat crop only coleopterans were studied and 46 species from 25 genera and 5 families (Carabidae, Scarabaeidae, Silphidae, Cerambycidae and Tenebrionidae) have been registered. Common to both cultures were 18 species of coleopterans. The most characteristic for these cultures have been the specimens of the families Carabidae and Scarabaeidae, the last being attracted to baited traps (small rodents fallen accidentally in traps). Keywords: alfalfa, Coleoptera, collembola, species diversity, winter wheat. Introduction Agricultural ecosystems constitute about 75.6% of the territory of Moldova. This leads to a drastic ecological disturbance, to the intensive exploitation of natural resources. In the agricultural sector, which has a significant impact upon the environment, the measures on maintaining ecological balance, including the preservation of entomofaunistic complexes, are very important. It is known that in agrocoenoses, during many years of using, specific faunistic entomocomplexes were formed, which include species of harmful, useful and neutral insects. Useful insects in agricultural ecosystems must be maintained in spite of the agricultural activities, also should be preserved and renewed the adjacent forest shelter belts where the insects migrates after harvesting crops. The success agriculture derives from the stability of ecosystems, where the entomofauna is a basic component. In these aim two main crops has been selected where faunistic studies were accomplished in order to identify existing entomocomplexes. Material and methods Faunistic material was collected from the alfalfa field (Medicago sp.) nearTrebujeni locality and in the winter wheat crop, near Branzeni locality in the summer of 2008 and 2010 years. During the collection of invertebrates the abiotic parameters such as soil and air temperature, soil M A R I S I A, XXIX-XXX, p. 77-82
