DYNAMICS OF OCCURRENCE OF DOMINANT SPECIES PSEUDOOPHONUS RUFIPES (DE GEER, 1774) AT HORDEUM SATIVUM, VAR ANNUA AND HORDEUM SATIVUM, VAR. BIENNIS PUBLISHEDJana PORHAJAŠOVÁ, Jaroslav NOSKOVIČ, Alena RAKOVSKÁ, None
Agroecosystems represent specific biotopes compared to natural biotope, the presence of Zoocenosis individuals; especially their quantitative and qualitative composition significantly indicates the state of the environment. An important part of the agrozoocenosis is family Carabidae. Its major role is that Carabidae species act as natural enemies of harmful insect in agriculture. One of the dominant species occurring within agroecosystems is a species Pseudoophonus rufipes (De Geer, 1774), which acts as a generalist and its occurrence reaches automatic dominant representation. The study was realized at Dolná Malanta (Slovak Republic) within the polyfactorial field experiment, two growth crops: spring barley (Hordeum sativum var. Annua) and winter barley (Hordeum sativum var. Biennis) in conventional farming systems. The site is located at an altitude of 175-180m above the sea. The soil type is brown soil and territory belongs to the categories of high-producing soil. Epigeic material by the earth traps method was obtained. During the five-years period within the spring barley 4182 individuals (exemplars = ex) were obtained, belonging to the family Carabidae, it representing from the whole set 66.32% representation. Within the winter barley 4859 ex were obtained, belonging to the families Carabidae, which was 71.00% representation. Biological material was determined on the lowest systematic unit - species. From the above mentioned values was dominant species Pseudoophonus rufipes represented in spring barley 1961 ex. And within the winter barley 2568 ex. Dynamics of its occurrence was in spring barley: 1st year – 351 ex, 2nd year – 1057 ex, 3rd year – 441 ex, 4th – 0 ex, 5th – 112 ex. Maximum incidences reached in second year, which was satisfactory in terms of climatic conditions. Occurrence in winter barley was as follows: 1st year – 605 ex, 2nd year – 832 ex, 3rd year – 931 ex, 4th – 84 ex, 5th – 116 ex, with a peak incidence in the third year. Based on the above can be winter barley evaluated as crop with more satisfactory topical and trophic conditions. Dominant representation showing even species Pterostichus melanarius (Illig., 1798), which recorded in spring barley incidence 320 ex (12.58% representation) and in winter barley 146 ex (5.11% representation). Occurrence of other species was only at the level of subdominant, recendent respectively subrecendent representation, i.e. occurrence of less than 5%. Based on the calculated of species identity according to Jaccard is similarity of species composition for both monitored variants identical to 68%.
Carabidae, Pseudoophonus rufipes (De Geer, 1774), Hordeum sativum, var. Annua, Hordeum sativum, var. Biennis