This unit takes students through topics 2.1 Species and Populations 2.2 Communities and Ecosystems 2.3 Flows of Energy and Matter .I keep 2.4 and 2.5 for later in the year. There is a danger of "ecology overload" with students becoming tired of the lack of a "human element". I also need to keep the practical field work elements to the Swiss summer when we have better weather. Another aspect to consider is that we revisit...