Recommended as a solid foundation and good frame of reference (common language) for anyone involved in the ERC (Ecosystem Restoration Camps) project: this course produced by Open University:
In this course you will discover how organisms are linked together by complex interrelationships, how such links are studied and how the physical properties of a particular habitat interact with the organisms that inhabit it. Using case studies, you will come to learn how knowledge of ecosystems leads to understanding of their individual importance, and how they can be preserved. (Source)
It features world-class content by such veteran presenters as David Attenborough and John D. Liu, so you know it will be as entertaining as it is enlightening.