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Chapter 16...
| Question | Answer |
|---|---|
| ecology | study of interactions of living organisms w/ one another and w/ their physical environment |
| habitat | a place where a particular pop. of a species lives |
| community | many different species that live together in a habitat |
| ecosystem | consists of a community and all the physical aspects of its habitat |
| abiotic factors | physical aspects of a habitat |
| biotic factors | organisms |
| biodiversity | the variety of life in the world or in a particular habitat or ecosystem |
| pioneer species | first organisms to live in a new habitat |
| succession | somewhat regular progression of species replacement |
| primary succession | succession thats occurs where life has not existed before |
| secondary succession | occurs in areas where there has been previous growth |
| primary productivity | rate at which organis material is produced by photosynthetic organisms in an ecosystem |
| producers | organisms that first capture energy |
| consumer | organism that consumes plants or other organisms to obtain the energy |
| trophic level | each of several hierarchical levels in an ecosystem, comprising organisms that share the same function in the food chain and the same nutritional relationship to the primary sources of energy |
| food chain | path of energy through the trophic levelss of an ecosystem |
| herbivores | second trphic level; animals that eat plants or other primary producers |
| carnivores | animals that eat other animals |
| omnivores | use simple sugars and starches to break down food |
| detrivores | organisms that obtain their energy from the organic wasyes and dead bodies that are produced at all trophic levels |
| decomposers | decompose organic material |
| food web | interconnected group of food cahins |
| energy pyramid | diagram in which each trophic level is presented as a block |
| biomass | dry weight of tissue and other organic mater found in a specific ecosystem |
| biogeochemical cycle | paths form when a substance enters living organisms |
| ground water | water beneath the earth |
| transpiration | water moves into the atmosphere by evaporating from leaves |
| nitrogen fixation | process of combining nitrogen with hydrogen to form ammonia |
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