Chapter 2 Glossary Terms

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Chapter 2 Glossary Terms
2015-09-29 11:07:18
science ecology glossary

This is for my Gr.9 science class
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  1. Population
    • All the individual species that live or occupy a certain geographic area at a certain time.
    • ie, current human population is approximately 7.3 billion.
  2. Exponential Growth
    • Accelerating growth that produces a J curve.
    • It is usually due to an introduction to a new habitat that has an increase in resources. 
    • Exponential growth only happens over a short period in nature
  3. Limiting factors
    • Factors that affect growth, distribution, or amount of population in an ecosystem.
    • ie, water, food, space, etc...
  4. Carrying Capacity
    • The size of a population that can be supported indefinitely with the resources available and the services of an ecosystem
    • When carrying capacity is exceeded the population is decrease and finds a new equilibrium.
  5. Ecological Niche
    • The way an organisms occupies a position in an ecosystem, this includes all of the biotic and abiotic factors
    • Most animals have a very narrow minded niche which only lets them live in certain ecosystems
    • Humans have evolved in such a way that allows us to create our own niche. This lets us thrive in many different ecosystems
  6. Predator
    • An organism that kills and consumes other organisms for energy and survival. à
    • e, wolf, lion, etc...
  7. Prey
    An organism that is eaten as food. ie, rabbits, insects, etc...
  8. Mutualism
    • A symbiosis in which both organisms benefit from the relationship.
    • ie, bumblebee and flower, etc...
  9. Parasite
    • An organism whose survival and niche is dependent on close association of a host organism.
    • Parasites provide no benefit to the host organism and usually just feeds of it's nutrients
    • ie, brain worm and white tailed deer, tapeworm and human.
  10. Competition
    • When two or more organisms compete for a resource in the same location during the same time
    • ie, when the brook sticklebacks are in the same lake with the nine-spine sticklebacks they were found they were found mostly on the bottom vegetation
  11. Sustainable Use
    It is use that does not lead to long term depletion of a resource or affect the diversity of the ecosystem from which the resource was obtained.
  12. Doubling Time
    • Doubling time is the time it takes for a population to double in size.
    • Ie, Canada reached a population of one billion, a doubling time of only 200 years
  13. Ecological Footprint
    • It is the measure of the impact of an individual or population on the environment in terms of energy consumption, land use, and waste production.
  14. Unstainable
    Unsustainable is a pattern of an activity that will lead to the decline of a function in an ecosystem.
  15. Sustainability
    Sustainability is the use of Earth’s resources, water and land, that at the right level will last forever.
  16. Ecosystem services
    • Ecosystem services are the benefits experienced by organisms,including humans, that are provided by sustainable ecosystems. 
    • Forests provide housing to thousands of species. Forests also affect climate and reduce erosion in watersheds. The main ecosystem service they provide are the paper products that come out of them.
    • Insects also provide ecosystem services. Some of those include pollinating plants so they are able to reproduce. Another service that insects offer is that are one of the main decomposer in the world
    • Migratory birds provide
  17. Desertification
    • When a non desert land becomes a desert due to an unsustainable farming or water use.
    • A cause of desertification can include clear cutting, this is when people cut forests in a large scale which causes droughts and ultimately desertification
  18. Ecotoursim
    A form of tourism that is sensitive to the health of an ecosystem and involves recreational activities provided by sustainable ecosystems.