Biology IB Study Guide 1: Communities and Ecosystems 5.1 Communities and Ecosystems (Core) 5. 1. 1 Define species‚ habitat‚ population‚ community‚ ecosystem‚ and ecology. Species – A species is a group of organisms with similar characteristics‚ which can interbreed and produce viable‚ fertile offspring. Habitat – A habitat is the environment in which a species normally lives or the location of a living organism. Population – A population is a group of organisms of the same species‚ who
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chapter 4 of Environmental Science‚ it is easy to recognize the different trophic levels. Each trophic level shows how energy and biomass flow through a food chain however it is eventually lost as heat. These levels consist of: biomass of producers‚ those consumed‚ and those not consumed. The first trophic level has the producers which graze the food chain‚ grazers consist of the second level‚ then carnivores feed on the second level and continues on. After reviewing figure 4-12 in the same course textbook
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occasionally receiving more [1]. At the first trophic level the producers are found‚ including: plants‚ flowers‚ seeds‚ nuts and fruit. The first order consumers‚ found on the second trophic level‚ consist of herbivores (small mammals‚ birds‚ amphibians and insects) only. On the second trophic level medium sized predators are found. The tertiary consumers at the top of the food web include large carnivores that have no natural predators. The first trophic level of any ecosystem consists of producers
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have larval and juvenile stages that feed at a low trophic level‚ while the adults feed at a tertiary or quaternary trophic level? If the larvae and juveniles feed at a lower trophic level‚ then there is less of a risk for them to be consumed‚ since they are feeding in a more inconspicuous manner. The adults can fend for themselves better‚ and therefore can feed at a high level with larger organisms. Not all adults feed at a high trophic level. Whale sharks (50 ft.) are the largest fish and feed
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that eats primary consumers • tertiary consumers-a carnivore that eats secondary consumers • trophic levels-levels in yhe feeding structure of organisms. Higher trophic levels consume organisms from lower trophic levels • food chain- The sequence of consumption from producers through tertiary consumers. • food web- A complex model of energy and matter move between trophic levels. • Scavengers-a carnivore that consumes dead animals • Detritivores- an organism that specializes
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Name: Sir Bizzle Period: 6 B.S. 3.3: Food Chains and Food Webs Scene 1: 1. What are the two ways living organisms obtain energy? A. Directly from the sun and by eating other organisms B. Directly from the sun and drinking water C. Eating other organisms and drinking water D. None of the above Scene 2: 2. Which of the following statements is true? A. Fungi‚ bacteria‚ and insects produce their own food B. Plants are consumers C. Wolves are decomposers D. None of the
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wind‚ temp‚ Temp‚ Biotic (living) factors Trees‚ rabbits‚ insects‚ birds… Lions‚ snakes Fish‚ plankton‚ Birds‚ monkeys bacteria‚ Insects‚ bacteria Animals 3. Give examples of ecological studies performed at the population‚ community‚ and ecosystem level. POPULATION- ecologist study the deer population in the north west or they study the population of rattle snakes in AZ. They study the size of the population and how it changes over time. They study what type of foods are eaten and what types of habitats
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physical factors such as soil‚ rainfall‚ sunlight‚ temperatures Ecology is an extremely complex and very diverse subject and it includes a variety of disciplines in addition to biology‚ e.g. geology‚ chemistry‚ physics‚ meteorology‚ and mathematics Four levels of ecological organization: Population - group of individuals of the same species occupying a common geographical area Community - two or more populations of different species occupying the same geographical area Populations and communities include
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Ecology is the scientific study of interactions among organisms and their environment. In relation to The Lion King‚ ecology is the circle of life. Ecological succession can change a community by making exponential changes to the ecosystem over time‚ symbiotic relationships are important in maintaining a stable ecosystem because they provide competition‚ parasitism‚ mutualism‚ and commensalism to have balanced populations‚ and the impact of a change in the food web would be drastic to the
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Communities and Ecosystems 37.1 Multiple Species Interact in Communities ~Communities are composed of coexisting populations of multiple species ~An ecosystem consists of a biotic community plus its abiotic environment ~Each species in a community has a place where it normally lives and a set of resources necessary for its life activities ~Ecologists describe the diversity of a community by measuring species richness and the relative abundance of each species. * Populations interact in many
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