ABSTRACT
According to International Council of Scientific Unions (ICSU), science of the 21st century has to be integrative, problem solving and policy oriented. Ecohydrology provides the methodological framework on how to use ecosystem processes, that is water-biota interplay, as a management tool. In the Anthropocene Era, Humanity has, due to demographic processes and exploitation of natural resources, approached the carrying capacity of the biosphere. An intensive change in the mutual relations between humans and the environment begun with the advent of the industrial era. Water is the primary factor limiting and regulating the ability of ecosystems to accumulate carbon, nitrogen, and phosphorus. An example of the complexity of the interrelations between hydrology and biota, thus justifying the necessity of its profound understanding, is the abiotic- biotic regulatory concept. Process-oriented thinking in the integrative environmental science has to be driven by physics and integration of knowledge.
