Ecosystems 0.0 / 5 ? BiologyCells, tissues and organsIGCSEEdexcel Created by: tsalomrobertsCreated on: 27-02-21 20:43 What is habitat The place where an organism lives 1 of 17 What is a population All the organisms of one species in a habitat 2 of 17 What is a community All the different species in a habitat 3 of 17 What is an ecosystem All the organism living in a particular area and all the non-living conditions 4 of 17 What are the parts on an ecosystem Decomposer, Producer, Primary, Secondary, Tertiary consumers 5 of 17 What is a producer Organisms that photosynthesis to produce food 6 of 17 What is a consumer Animals that eat plants or other animals 7 of 17 What is a decomposers Organisms that break down dead organisms and help to recycle nutrients 8 of 17 What is a quadrat Samplings organisms which do not move 9 of 17 Define Species Evenness Is a measure of the relative abundance of the different species making up the richness of an area 10 of 17 Define Species Richness The number of species per sample is a measure of richness 11 of 17 What are biotic factors Availability of food and competition. Predation. Parasitism. Disease. Presence of pollinating insects. Availability of nest sites 12 of 17 What are abiotic factors Climate. Hours of daylight. Soil conditions. Salt content. Pollution 13 of 17 What are pyramids of numbers Which represent the numbers of organisms in each trophic level in a food chain 14 of 17 Pyramids of biomass Show the total mass of the organisms in each trophic level 15 of 17 What is a Trophic Level Each step along the pathway of a food chain 16 of 17 Why is energy lost through a food chain Respiration releases energy. Waste Excretion. Bigger animals use more glucose to generate heat to keep core temperature. 17 of 17
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