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Description
Flashcards by Rebecca Reade, updated more than 1 year ago
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Created by Rebecca Reade
over 7 years ago
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| Question | Answer |
| What's the difference between the terms population and community? | Population is the total number of a species living in an environment and community is the total number of individuals from different species living in an environment. |
| Definition of a niche | A niche is an organisms role in an ecosystem. |
| Definition of predation | Predation is the presence of predator that reduces the number of organisms in the prey population. |
| Intraspecific competition | competition between members of the same species for resources. |
| What makes up an ecosystem? | the Biotic (living) factors and Abiotic (non- living factors) make up an ecosystem. |
| What are organisms influenced by? | Organisms are influenced by the amount of environmental components. For example, there will be a very small distribution of plants in a shaded area under a tree because there is very little light availability but in a sunny are there will be a very high distribution of plants because of the availability of light. |
| What is meant by carrying capacity? | Carrying capacity is the maximum population size which an environment can hold. |
| This is the population growth curve. The first part of the graph is a shallow curve showing that there is slow growth of the population size because there are few individuals present. Then the second part is the rapid growth, there are more individuals and they continue to reproduce. The last part of the graph is the part where it plateau, this is when carrying capacity has been reached, this will fluctuate but will remain relatively constant. | |
| 3 Biotic factors that can affect population size | interspecific competition intraspecific competition predation |
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