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Science and the Environment Matter and Energy in Ecosystems Abiotic Click here to reveal the definition! Of or relating to nonliving things. Autotroph An organism that produces its own food, including photosynthetic organisms such as green plants and Click here to reveal the definition! phytoplankton and chemosynthetic organisms such as sulfur bacteria. Biome An area having similar climate and Click here to reveal the definition! landforms throughout, hosting a large set of ecosystems. Biotic Click to reveal the definition! Of orhere relating to living things. Carbon Cycle The movement of carbon through an Click here to reveal the definition! ecosystem, primarily through photosynthesis and respiration. Carinvore An animal that gets its energy for life Click here to reveal the definition! by eating other animals. Cellular Respiration The process in which carbon-rich sugar molecules react with oxygen to make energy Click here to reveal the definition! for cell’s use; occurs in hetertrophs and autotrophs. Commensalism A symbiotic relationship in which here to reveal the definition! oneClick participant experiences a benefit and the other is unaffected. Competition A rivalry that occurs when two species or two individuals within a species the same Click here to reveal theneed definition! resource- food, shelter, and son on- to survive. Decomposer An organism that breaks down other Click here into to reveal the definition! organisms organic molecules after they have died. Denitrification Bacterial reduction of nitrates or Click here to reveal the definition! nitrites. Emigration The movement of individuals out of Click here to reveal the definition! a population. Food Web A diagram showing the food Click here to reveal the definition! relationships between multiple organisms within a community. Herbivore An organism whose sole food source here to reveal the is Click plants; herbivores candefinition! be a food source for carnivores and omnivores. Heterotroph An organism requiring complex organic compounds of Click nitrogen and to carbon for metabolic synthesis; it here reveal the definition! must get its energy from plants and animals. Hydrological Cycle The movement of water through the Click here to reveal the definition! biosphere. Immigration The permanent relocation of new Click here to reveal the definition! individuals into a population. Invasive Species A new species that has moved into Click here to reveal definition! an ecosystem and the outcompetes native species for resources. Legume A plant with root nodules that Click here to reveal the definition! contain nitrogen-fixing bacteria. Mortality The number of deaths in a Click hereintoareveal definition! population giventhe place and time. Crude Death Rate Mutalism A symbiotic relationship in which Click to reveal experience the definition! bothhere participants a benefit. Natality The number of births in a population Click here to reveal the definition! in a given place and time. Nitrification Conversion by bacteria of Click here tocompounds reveal the definition! ammonium to nitrate compounds. Nitrogen Cycle The process by which atmospheric nitrogen is made available forreveal organisms eventually Click here to the and definition! returned to the atmosphere. Omnivore An organism that eats both plants and animals; Click here omnivores to reveal may the definition! be a food source for carnivores and omnivores. Parasitism A symbiotic relationship in which Click here to benefits reveal thewhile definition! one organism causing harm to the other organism. Population A group of individuals of the same species that occupy same area and that Clickthe here to geographical reveal the definition! can interbreed. Predation The act of one organism (predator) Click here to reveal the definition! feeding on another organism (prey). Primary Consumer An organism that gets its energy by eating plants; aredefinition! often a food Clickprimary here toconsumers reveal the source for secondary consumers. Producer An organism that makes its own food through Click here photosynthesis to reveal the or definition! another chemical process such as chemosynthesis. Secondary Consumer An organism that gets its energy by Click hereprimary to revealconsumers; the definition! eating a carnivore or omnivore. Succession The process in which plant and animal populations areto slowly replaced over time by Click here reveal the definition! different plant and animal populations. Symbiosis A relationship that occurs when two Click hereorganisms to reveal the distinct livedefinition! in close association with one another. Tertiary Consumer A third-level consumer that gets its Click here reveal among the definition! energy bytoeating, other organisms, secondary consumers. Trophic Level Click here tolevel reveal definition! A feeding in the a food web. Trophic Pyramid A graphic representation of the trophic levels in an ecosystem, often shaped like a pyramid, with Click here to reveal the definition! producers at the base and the tertiary or quaternary consumers at the top.