energy transfers

• All energy comes from the sun. 
• Plants are autotrophs and make organic compounds. Most sugars produced by the plant are used by the plant as respiratory substances. The rest are used to make biological molecules which form the biomass of the plants. 
• Producers are photosynthetic and make organic substances. 
• Consumers are organisms that feed on other organisms. 
• Saprobionts break down dead organisms to release minerals and elements which can be absorbed and recycled by plants. 
• Food webs represent feeding relationships and the arrows show the energy flow between trophic levels.