Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Ecology Vocab #3-5

TermDefinition
Food chain A series of steps in which organisms transfer energy by eating or being eaten.
Food web A network of food chains.
Trophic level An individual step within a food chain, food web, or pyramid.
Ecological pyramid Shows the relative amount of energy available at each trophic level of a food chain or food web.
Energy pyramid A diagram that shows the loss of energy in an ecosystem; the greatest amount of energy is found at the bottom.
Biomass pyramid A diagram that shows how an ecosystem's weight by species is distributed; largest group is producers (found at bottom).
Pyramid of numbers A diagram that shows the relative numbers of different species in an ecosystem; largest amounts are at the bottom.
Biomass The total amount of living material in a given habitat, population, or sample; number is expressed as a mass that can be measured on a balance.
Biogeochemical cycle Matter is recycled within and between ecosystems in closed loops.
Water cycle Water continuously moving between oceans, the atmosphere, and the land.
Nutrient cycle Nutrients moved into and out of organisms to build tissue and carry out life functions.
Carbon cycle Carbon is continuously exchanged between the atmosphere and oceans.
Nitrogen cycle Nitrogen exists in many forms (as ammonia and nitrogen compounds) and is continuously recycled.
Phosphorous cycle Found as inorganic compounds in rocks and minerals; cycles through using plants.
Denitrification Bacteria convert nitrates into nitrogen gas to get energy.
Competition Occurs when two organisms attempt to use the same resource (food, space, a mate) at the same time.
Competitive exclusion principle No two species can occupy the same niche at the same time.
Keystone species A single species in an ecosystem that, if changed, can impact the entire ecosystem.
Biodiversity Sum total of all of the different species of habitats and organisms that make up the Earth.
Ecological succesion Series of changes that occur in a community over time.
Primary succesion Begins in an area with no remnants of an older community; usually occurs after a natural disaster (volcano or earthquake).
Secondary succesion Occurs in ecosystems where an existing community was not fully disturbed/destroyed; usually occurs after wildfires or hurricanes or human activities.
Pioneer species First species to colonize barren areas after natural disaster; usually lichens and mosses.
Climax community The original community that existed before a natural disaster.
Carrying capacity Maximum number of individuals that the environment can support.
Native species An organism that "belongs" in the ecosystem; has evolved with the ecosystem (Canada goose).
Invasive species An organism that successfully takes over an organism's niche and is not native to the area (Burmese python, Asian long horned beetle).
Deforestation Destruction of forests for the increased clearing of land to create farms and homes for the increasing world population; can lead to other environmental issues.
Created by: Jlags