Module 3: Ecosystems and Sustainability 0.0 / 5 ? BiologyEcology and biodiversityA2/A-levelOCR Created by: EmmaCreated on: 05-05-14 11:09 452937186 Across 1. Level at which an organism feeds in a food chain (7, 5) 5. Directional change in community over time (10) 6. Converting nitrates back to nitrogen gas (15) 7. pH, temperature and soil types are all examples of -------- factors (7) 8. Bacteria in the soil that oxidise nitrites to nitrates (11) Down 2. All the populations of different species that live in the same place at the same time and can interact with each other (9) 3. Cutting a tree trunk close to the ground to encourage new growth (9) 4. What is the term for "the rate at which energy passes through each trophic level in a food chain?" (12) 9. To create a pyramid of energy, you burn organisms in a ---------? (12)
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