Percentage of apophytes and anthropophytes in the segetal flora of East Pomerania under study in the years 1972-1979

摘要

The aim of this paper is to present a historic-geographical analysis of the segetal flora of East Pomerania on the basis of floristic materials collected in the years 1972-1979. It shows: the percentages of apophytes and of two anthropophytes groups, i.e., archaeophytes and kenophytes in the cropfield flora of the study region, and compares it with their occurrence in other parts of the country. The frequency of occurrence of different taxa in the respective groups, depending on the specificity of a mesoregion, and the menace to crops from the particular weed species in the study period are also analysed. This paper also indicates which species are rare within the whole mesoregion considered, or which are likely to become a threat to crops in the near future.