ecology 0.0 / 5 ? BiologyVariety of life and classificationIGCSEEdexcel Created by: Carlos52004Created on: 01-05-14 13:13 a distinct, self supporting system of organisms interacting with each other and with their physical enviroment ecosystem 1 of 12 all the organisms of a particular species living in an ecoystem at a particular time population 2 of 12 all the populations of living organisms living in a ecosystem at a particular time community 3 of 12 they produce food for photosynthesis producers 4 of 12 animals are ... in the food chain consumers 5 of 12 represent the number of organisms at each trophic level in a food chain pyramid of numbers 6 of 12 represents the total biomass of organisms at each trophic level pyramid of biomass 7 of 12 organisms such as bacteria or fungi that break down and decompose deaad material decomposers 8 of 12 Nitryfing bacteria oxidise the ammonia to make nitrites and then to nitrates in a process called nitrification 9 of 12 this gas causes acid rain sulfur dioxide 10 of 12 these gases trap heat energy from the sun in the atmosphere around the earth greenhouse 11 of 12 a lack of oxygen in water eutrophication 12 of 12
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