EN
The article presents the results of research on the differentiation of Cuba natural environment. The applied method was worked out by B. Dumanowski and is based on grawing up maps of differentiation of respective elements of the natural environment (geology, relief, climate, surface waters, soils and vegetation) constituting the basis for drawing up a synthetic map of differentiation of the natural environment. According to the suggestion of the authors such a map may be helpful in studying the links occuring between nature and the man. The comparison between the differentiation of the natural environment and population density in Africa made by Dumanowski indicates that regions of a more diversified environment are in general more densly populated than the less diversified ones. The researeh undertaken by the authors of the article is aimed at testing whether a similar dependence can be observed between the differentiation of the natural environment and the differentiation of one form of man's economic activity, namely land use. Maps included in the National Atlas of Cuba were used in the work. In principle the same features of respective elements of the natural environment as those selected by Dumanowski in the case of Africa were adopted in working out their differentiation. The features were as follows: for geology - age of rocks and their lithology (lithostratigraphic types of rocks); for relief - relative heights and erosional dissection of the area measured by the lenght of valleys; for climate average annual temperature and average annual sum of precipitation; for surface waters - lenght of water flow and size of surface fluction; for soils – genetic types; for vegetation - its types.The differentiation of respective elements was presented on maps in the scale of 1 : 1 500 000, divided into 494 basic fields equalling ten geographic minutes. The values calculated for every field¹ were grouped into 5 classes expressing various differentiation levels. Class I included fields lacking or of very small differentiation, class II - fields of small differentiation, class III - of medium differentiation, class IV - of large differentiation an class V - of very large differentiation. The synthetic map of differentiation of the natural environment (Fig. 7) was drawn up on the basis of the maps of differentiation of respective elements (Figs 1-6). The latter (Fig. 7) was compared with the map of differentiation of land use (Fig. 8). An initial observation of both maps allows to state, that on the majority of Cuba territory areas of a more diversified land use also have a more diversified natural environment. The comparison of corresponding differentiation classes of land use and natural environment separated on these maps makes it possible to state that they are equal in 205 basic fields (41,5 per cent of investigated fields) and in further 197 fields (39,9 per cent) they differ by one class (Fig. 9). Also the coefficients of correlation between the differentiation of land use and differentiation of the naturel environment and its elements were calculated (Table 1). The values of those coefficients indicate that the correlation between the differentiation of land use and differentiation of the natural environment is (statistically) more significant than in the case of individual elements of the environment (soils excluded). On the basis of the values of correlation coefficients it is possible to determine the following hierarchy of natural environment elements influencing the differentiation of land use in Cuba: soils, vegetation, surface waters, geology, relief, climate. The obtained results entitle to state that there exists a distinct connection between the differentiation of land use and differentiation of the natural environment of Cuba.