Biotic and Abiotic Factors

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Biotic
Living elements of a habitat which affect the ability of a group of organisms to survive there. Predation, territory, competition, finding a mate and parasitism.
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Predation
describes the relationships between predator and prey populations predicts that the populations will oscillate in a repeating cycle.
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Territory
Most likely used to make sure that a breeding pair has enough resources to raise their young. The type and size of territory will determine which species live in a particular community.
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Competition
Competition occurs when two organisms are competing for the same resource which is in limited supply. There is Intraspecific competition (within species) and Interspecific competition (between different species)
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Disease and Parasitism
Diseased organisms will be weakened Parasites and infectious diseases can be spread quickly when there is high population density. Communities with greater biodiversity will survive better.
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Abiotic
Non-living elements of the habitat of the organism. E.g. Water, light, temperature, wind, pH and oxygen.
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Mutualism
A form of interaction in which participating organisms gain benefit from the relationship. A symbiotic relationship.
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Light
Light can have an effect on the environment, as plants are dependent on it for photosynthesis. Animals can then be affected indirectly by light levels.
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Temperature
For a particular organism, there is a range of temperatures within which it can grow and successfully reproduce. The temperature particularly affects the rate of enzyme-controlled reactions.
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Wind and Water Currents
 Wind increases water and heat loss. Fewer species can survive in areas with strong prevailing winds while occasional gales and hurricanes can devastate populations. Water currents can overwhelm or drown animals if they are insufficiently adapted.
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Water availability
This is affected by the amount of precipitation, rate of evaporation and rate of loss by drainage through the soil. Water is vital for living organisms, so where the supply is limited it will cause severe problems.
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Oxygen availability
This can be in short supply in water or soil. if temperature increases or water is stagnant, the rate at which oxygen dissolves decreases.
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Other cards in this set

Card 2

Front

describes the relationships between predator and prey populations predicts that the populations will oscillate in a repeating cycle.

Back

Predation

Card 3

Front

Most likely used to make sure that a breeding pair has enough resources to raise their young. The type and size of territory will determine which species live in a particular community.

Back

Preview of the back of card 3

Card 4

Front

Competition occurs when two organisms are competing for the same resource which is in limited supply. There is Intraspecific competition (within species) and Interspecific competition (between different species)

Back

Preview of the back of card 4

Card 5

Front

Diseased organisms will be weakened Parasites and infectious diseases can be spread quickly when there is high population density. Communities with greater biodiversity will survive better.

Back

Preview of the back of card 5
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