18 April 2015

#64.1 Ecology Syllabus 2015

• Levels of ecological organisation
• Energy flow through ecosystems
• Recycling of nitrogen

Learning Outcomes

Candidates should be able to:

(a) define the terms habitat, niche, population, community and ecosystem and be able to recognise
examples of each ;

(b) explain the terms autotroph, heterotroph, producer, consumer and trophic level in the context of food chains and food webs ;

(c) explain how energy losses occur along food chains and discuss the efficiency of energy transfer
between trophic levels;

(d) describe how nitrogen is cycled within an ecosystem, including the roles of nitrogen-fixing bacteria (e.g. Rhizobium) and nitrifying bacteria (Nitrosomonas and Nitrobacter);

(e) use the knowledge gained in this section in new situations or to solve related problems.
Note: An ecosystem should be studied in relation to an area familiar to the candidates.

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