EN
The aim of the present paper is description of the beginning of bioenergetics studies and its development in Poland, in Warsaw center of biological sciences. Generally bioenergetics is the study of energy transformations in living organisms, and that such a study may be according to any one of three approaches: the molecular-biochemical, the physiological and the ecological. It should be noted therefore that ecological bioenergetics, being concerned solely with energy transformations by ecological units, is but one aspect of ecology; although one which can make significant contribution to our understanding of how a nature functions. The main fields of bioenergetics studies in Institute of Ecology and than in the Centre for Ecological Research of the Polish Academy of Sciences in Dziekanów Leśny near Warsaw are: energetic budgets of invertebrates, bioenergetics of early developmental stages of fish species, mathematical modeling of energy flow through an animal, population, community and ecosystems, such a soil, sandy beach etc. Now bioenergetics can be a useful tool in individual-based approach in ecology.