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Unit 9 Terms
WSHS - Biology Smith/Tedder Unit 9 Terms
| Question | Answer |
|---|---|
| Consumer | organism that relies on other organisms for its energy and food supply |
| Biome | group of ecosystems that have the same climate and dominant communities |
| Limiting nutrient | single nutrient that either is scarce or cycles very slowly, limiting the growth of organisms in an ecosystem (ex. algae bloom) |
| Producer | an organism that can capture energy from sunlight or chemicals and use it to produce food from inorganic compounds; aka autotroph |
| Detritvore | organism that feeds on plant and animal remains and other dead matter |
| Biogeochemical cycle | process in which elements, chemical compounds, and other forms of matter are passes from one organism to another and form one part of the biosphere to another |
| Scavengers | a consumer that feeds on dead organisms |
| Food web | a network of interconnecting food chains |
| Biosphere | the layer of earth that supports life |
| Ecology | the study of living things relating to the environment |
| Heribivor | plant eaters; primary/1st order consumers |
| Carnivors | meat eaters/secondary/2nd order consumers |
| Population | members of the same species that live in the same area |
| Community | different species living in the same area |
| Ecosystem | all the living and non-living things in an area |
| Species | similar organisms that can mate and produce offspring that are fertile |
| Omnivor | eats everything; third order consumer |
| Trophic | level or step of energy |
| Sunlight | the main source of energy for all living things |
| Denitrofication | the process that puts nitrogen back into the atmosphere |
| Transpiration | loss of water from plant leaves |
| Nitrogen fixation | the process in which bacteria convert nitrogen gas into nitrates |
| Nitrogen gas | what 78% of the atmosphere is composed of |
| succession | natural growth that occurs in an ecosystem |
| secondary succession | regrowth of an ecosystem that was destroyed |
| primary succession | first growth of a new body of land |
| pioneer species | the first living thing in an area or ecosystem ex. moss or lichen |
| lichen | fungus and algea living together (ex. of mutualism) |
| esturay | the most fragile of all areas because it stays in constant disturbance |
| biotic | living organisims |
| abiotic | non-living organisims |
| predation | interactin in which one organism captures and feeds on another organism |
| mutualism | when two different series live together and each benefit |
| commensualism | when one species benefits and the other is unaffected |
| parasitism | when one species benefits and harms the other |
| immegration | moving into an area |
| emigration | moving out of an area |
| denisty | amount per space |
| limiting factor | anything that causes a population size to decrease |
| denisty | amount per space |
| limiting factor | anything that causes a population size to decrease |
| density dependent factor | worse in a very crowded (aks dense) population (i.e. disease, parasites, competition) |
| density independent factor | any factor that is not based on density i.e. natural disasters, flood, drought,hurricane, tornado) |
| green revolution | the development of hightly productive crop strains and the use of modern agricultural techniques to increase yields of food crops |
| renewable resource | resources that continue naturally and can be replaced(food from plants, water) |
| nonrenewable resource | resources that once they are used up, are gone forever (natural gas, fossil fuels, coal, oil) |
| sustainable development | using natural resources at a rate that does not deplete them |
| erosion | process that washes away nutrients in the topsoil |
| deforestation | loss of the forest that leads to erosionas soil is exposed to heavy rain |
| biodiversity | the sum total of the variety of organisms in the biosphere |
| extinction | disappearance of a species from all parts of its geopraphical range |
| endangered species | species whose population size is rapidly declining and will become extinct if the trend continues |
| habitat fragmentation | splitting of ecosystems into small fragments |
| invasive species | plants and animals that have migrated to places where they are not native |
| biomagnification | increasing concentration of a harmful substance in organisms at higher trophic levels in a food chain or food web |
| glosbal warming | increase in the average temperatures on Earth |
| ozone layer | atmospheric layer in which ozone gas is relatively concentrated |
| demography | scientific study of human populations |
| population density | number of individuals per unit of area |
Created by:
ktedder
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