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16 Cards in this Set
- Front
- Back
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What is a population? |
A group of individuals of the same species living in a shared space at a specific time |
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Factors that increase population and decrease population |
Increase: birth and immigration Decrease: death and emmigration |
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What are the three ways to measure the size of a population |
sample area, mark and recapture, and count indivudals |
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What is population density? |
Refers to the number of individuals per unit of area or volume
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What factors affect population density? |
Increase: water and food Decrease: predators, parasites, and climate |
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What three main patterns describe how populations are distributed within their habitat? |
Clumped: occurs when animals form groups for protections Uniform: occurs when individuals are evenly distributed Random: randomly and unpredictably distributed |
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What are the two ecological factors and their definitions? |
Abiotic: non living factors can be physical or chemical aspects of the Biotic: living factors are related to action of the living organisms |
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Name 3 types of abiotic and 3 types of biotic factors |
Abiotic: -ph -temperature -amount of soil Biotic: -births -diseases -number of predators |
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What are limiting factors and give an example |
Limiting factors cause the population to decrease ex. not enough sunlight can cause the population of plants to decrease limiting factor: exposure to sunlight |
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What is a biological cycle? |
These cycles refer to the alternating rise and fall of population sizes |
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What is a community? |
Different species sharing the same habitat |
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What is biodiversity and what are it's 2 components? |
biodiversity: describes variety of species living in a community 1. Species richness (# of species) 2. relative abundance |
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When is biodiversity considered high? |
Number of species is high Relative abundance of species is similar |
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What are the four main ways species interact with each other? |
Competition Predation/Paratism Mutualism Commensalism |
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Describe Competition and Predation |
Competition: living organisms seek access to same ressources 1. intra species --- same species 2. inter species --- different species Predation: one living organism feeds on other |
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Describe Mutualism and Commensalism |
Mutualism: an interaction where two living organisms both benefit Commensalism: one organism benefits and one is not affected |
