INFLUENCE OF ABIOTIC FACTORS ON ECOSYSTEMS A limiting
INFLUENCE OF ABIOTIC FACTORS ON ECOSYSTEMS • • A limiting factor places an upper limit on the size of a population. Limiting factors can be biotic (for example, lack of food) or abiotic (for example, access to water). 2. 7 limiting factor tolerance range Every species is able to survive within a range of abiotic factors such as temperature, light, and soil. This range is called the species’ tolerance range. Species can be successful over a range of abiotic conditions. However, they will become stressed and will die out if conditions exceed their tolerance limits.
Key Abiotic Factors 2. 7 Vocabulary limiting factor tolerance range
Influence of Biotic Factors 2. 7 • Abiotic factors determine where a species can live, while biotic factors often determine how successful the species is in that location. Vocabulary • Many key biotic factors involve interactions between individuals. limiting factor tolerance range
Carrying Capacity • As a population’s size increases, the demand for resources also increases. Eventually, there will not be enough resources. 2. 7 carrying capacity • Also, as individuals become more crowded, they become more susceptible to predators and diseases. • The population of a species will eventually reach an upper size limit based on factors like these. • This size limit is called the carrying capacity of an ecosystem for that particular species. • The carrying capacity can be altered through natural or human activity when resources are removed or added to the ecosystem.
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