home *** CD-ROM | disk | FTP | other *** search
- ecology study of relationships between living things & their environment
- abiotic factors nonliving things that affect life - temp; water; light; minerals
- bioitc factors living things that affect others - plants; fungi; animals ...
- biosphere the limited region on earth; oceans; air - where life occurs
- ecosystem any area where living things interact with one another
- habitat the place in an ecosystem where a living thing lives
- population a group of organisms of the same species
- community all the populations in a given area
- niche the specific biological role of a living thing in a community
- water cycle movement of water from air to earth and back again
- carbon cycle movement of carbon through the ecosystems
- nitrogen cycle movement of nitrogen through the ecosystems
- N fixation the conversion of N gas into organic form - legumes; bacteria
- ammonification conversion of amino acids to ammonia
- nitrification conversion of ammonia by bacteria into nitrates
- denitrification conversion of nitrates into nitrogen gas
- producer living things that make their own food by photosynthesis
- consumer organisms that must eat other organims for food
- herbivores consumers that eat plants only
- carnivores consumers that eat other animals only
- omniovores consumers that eat both animals and plants
- decomposers organisms that break down dead organic material into inorganic
- food chain steps through which energy from sun is transferred through ecosystem
- food web interrelated food chains in an ecosystem
- symbiosis long term interaction involving two organisms
- mutualism symbiotic relationship in which both organisms benefit
- commensalism symbiotic relationship: one benefits and other gets no harm/no benefit
- parasitism symbiotic relationship: one beneftis and other organism harmed
- carrying cap'ctythe maximum population size a particular environment can support
- succession gradual change in a community
- climax communitystable community no longer changing via succession
-
-