THE ADAPTIVE REACTIONS OF PRIMARY-LEVEL AGRICULTURAL ECOSYSTEMS FOR UNFAVORABLE ENVIRONMENTAL FACTORS
Personal subsidiary farms (PSF) refer to primary-level agricultural ecosystems engaged in non-commercial activities on production and processing of agricultural output. The conditions for the functioning of PSF and the main functions and the domestic structure of production and consumption of agricultural products under the influence of economic and natural factors over the time change. The authors propose a unified methodological approach based on the integral calculation of energy costs connected with external and internal flows participating in the agricultural produce: natural, natural-anthropogenic and techno-anthropogenic flows. The methodology was tested on the example of the chosen personal subsidiary farm located in the Western Siberia taiga zone. The adaptive reactions of the explored farm to the changing environmental conditions were analyzed by the method of calculating the energy intensity of all the flows. The studies have shown that, in the conditions of economic instability, adaptation occurs by redistributing the energy costs volumes between the incoming flows and the activities of the economy are aimed at maximizing the use of the natural flow. On the other hand, favorable economic conditions create prerequisites for increased volumes of techno-anthropogenic flow and reduced usage of natural resources.