B4a - Ecology in the Local Environment 0.0 / 5 ? BiologyEcology and Environmental ScienceGCSEOCR Created by: natalie27Created on: 07-12-13 18:57 This is the total number of individuals of the same species that live in a certain area. Population 1 of 14 When using sampling methods, you must take a ___ enough sample to make a reliable estimate. Big 2 of 14 When using sampling methods, you must sample ________ to make it more representative of the population. Randomly 3 of 14 A technique to gather small insects. Have to be systematic to get representative results and is difficult to get an idea of numbers. Pooters 4 of 14 This sampling method is used in long grass or moderately dense woodland. Don't get representative results not good to find numbers of organisms. Sweepnets 5 of 14 The _______ traps are set into the ground to catch small insects. A mixture of ethanol or detergent is sometimes used to kill the samples. Pitfall 6 of 14 These are square frames that typically have sides of length 0.5m. Must be placed randomly. Can estimate the population of a certain species. Quadrats 7 of 14 A capture/recapture method to estimate animal populations called the _______ index. Lincoln. 8 of 14 A gradual change in the distribution of a species across a habitat. Zonation. 9 of 14 Part of the physical environment where an animal or plant lives. Habitat 10 of 14 Total number of individuals of all the different populations of organisms that live together in a habitat at any one time. Community 11 of 14 Variety of different species living in a habitat. Biodiversity 12 of 14 Physical environment with a particular set of conditions, plus all the organisms that live in it. Ecosystem 13 of 14 Man-made ecosystem, carefully controlled to keep the conditions constant. Biodiversity lower that non man-made ones. Artificial. 14 of 14
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