Botanička disciplina koja proučava odnose biljaka i biljnih zajednica (fitocenoza) prema spoljašnjoj sredini, kao i uzajamne odnose biljaka, i biljaka i drugih oganizama.
Botanical discipline that studies the relationships of plants and plant communities (phytocoenoses) to the external environment, as well as the mutual relations of plants, and plants and other oganisms.