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Science 7
Ecosystem
| Question | Answer |
|---|---|
| Organism | an individual form of life example: plants, animals |
| Populations | all the individuals of a given species in an area at a given time |
| Community | the population of organisms of different species in a given area and time |
| Ecosystem | all the living (biotic) and nonliving (abiotic) factors in an area this supports only certain numbers based on the amounts of food, water, living space, mates and other resources |
| Bio ( Biotic) | means life living organisms in an ecosystem |
| Biotic factor examples | animals, plants, flowers, trees, grass |
| A (abiotic) | not or without nonliving elements in an ecosystem |
| Abiotic factor examples | precipitation, sunlight, water, sand, temperature |
| Carrying Capacity | The largest number of species that an area can support |
| What happens if a population exceeds the carrying capacity | some will die or move to new locations |
| Limiting Factors | an abiotic or biotic factor that limits the number of individuals that can live in an ecosystem |
| What does limiting factors do? | keeps the population from growing too large |
| Competition | when resources are scarce fewer organisms can survive |
| What happens if there are a lot of resources? | greater number of organisms can survive |
| Greater number of prey the | greater number of predators |
| Fewer number of prey | fewer the number of predators |
| Parasitism | when an organism lives off a host organism sometimes killing the host |
| Parasitism examples | Ticks on a dog |
| Disease | when outbreaks kill off most or all of a population |
| Disease examples | flu, lyme |
| Human activities | destroy animal habitats |
| Human activity examples | developments, damming rivers, clear cutting forests |
| Sun | increases photosynthesis plant compete for sunlight by growing taller |
| Temperature | Warm areas support greater numbers of populations with less competition occurring Cold areas support limited numbers with greater competition |
| Soil | rich soils produce more carbon, and support larger populations with less competition |
| Water | availability, movement, temperature, saltiness, chemical components all affects competition an ability to survive in populations |
| Changing conditions | bring about change that reduce populations such as droughts, floods, volcanic eruption, earthquake |
| Biotic and Abiotic factors are | interrelated |
Created by:
mbarkley
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