Here is a link to a BBC programme. The warning is that it could be considered to have a left-wing bias, but if you are aware of that and think clearly, you are quite capable of making up your own mind.
What I liked was that he goes through the history of the idea of ecosystems. The Physics link is that some people modelled the feedback mechanisms using electronic circuits. Later it was discovered that the systems were far more complex than imagined. Though they didn't say in the programme, this would bring it under the topic of Chaos Theory in Physics.
http://www.bbc.co.uk/iplayer/episode/b011rbws/All_Watched_Over_by_Machines_of_Loving_Grace_The_Use_and_Abuse_of_Vegetational_Concepts/
