The determinations of values ​​of reduce of forest recreation resources due to anthropogenic influence
This article discusses the two main factors of anthropogenic impacts on forest ecosystems: recreation and anthropogenic air pollution. Degree of impact of these factors on tree species is compared via corresponding redu-ction in growth of Scots pine shoots, due to their separate and joint action. Growth of pine shoots was measured on sections of four categories: 1) areas subjected only to technogenic impact, 2) areas subjected only to the recreational exposure, 3) areas experiencing complex (anthropogenic and recreational) ef-fects, 4) control (without anthropogenic influence). Analysis of the dynamics of increments values ​​obtained during the experiment confirmed the working hypothesis read as follows: – These two types of impact on the forest environment may increase the effects of each other; – Plantation, exposured to the recreational press, but did not experience other harmful effects, can withstand greater recreational load than the same plantation in similar site conditions, but growing in gas polluted environment; – If the ecosystem is already weakened by the influence of a negative factor, in the event of the second, additional one, it will react to this new factor even stronger than in the case of a single independent impact; – In this case, the effect of gas concentration reduces the stability of natural systems to forest recreational loads, the negative effect of factors on biogeocenosis has synergistic effect, the value of ecological recreational capacity decreases, and hence recreational resource is exhausted. The latter provision is confirmed by the values ​​of environmental recreational capacity obtained for pine plantations subjected to recreational impact in terms of anthropogenic air pollution in their comparison with the corresponding values ​​in biogeocoenoses without anthropogenic influence. In this comparison action assessment of technogenic factor equivalent to recreational impact is implemented.