biodiversity and limiting factors in ecosystems. biodiversity -measure of the number of different...
DESCRIPTION
Biodiversity Check out the board to your right for the blanks on the Biodiversity diagram from your note Ecotone – transition zone between ecosystems where organisms from both ecosystems interact with each otherTRANSCRIPT
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Biodiversity and Limiting Factors in Ecosystems
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Biodiversity-measure of the number of different species presenting a given area.-i.e. classroom = 1 species
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Biodiversity
Check out the board to your right for the blanks on the Biodiversity diagram from your noteEcotone – transition zone between ecosystems where organisms from both ecosystems interact with each other
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Energy and Food Chains- every organism in an
ecosystem passes energy to organisms that eat them.- a food chain on it’s own is unstable because removal of one organism will destroy the chain.- the most stable ecosystems are those with the most biodiversity.
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Energy and Food Chains (Higher Biodiversity --> more complex food
webs--> many interconnections)
*removal of one species will not have catastrophic effects.Example - stable ecosystem = Rain Forest (High Biodiversity)
- less stable ecosystem = Arctic (Low Biodiversity)
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Limiting Factors in Ecosystems
population: all of the individuals of a species that live in a certain place at a certain timecarrying capacity - the largest population size an ecosystem can sustain
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Limits on Populations
A. Biotic Potential - The max. number of offspring that a species could produce if resources were limited.Birth Potential – max number of offspring per birthCapacity for survival – number of offspring that reach reproductive ageProcreation – number of times a species reproduces each yearLength of reproductive life – the age of sexual maturity and the number of years the Individual can reproduce
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Limiting FactorsB. Limiting factors - any resources that limit the size to which a population can grow
Decreasing oxygen supplylow food supplydiseasepredatorslimited space
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Limiting FactorsC. Carrying Capacity - the largest population size an ecosystem can sustainStability is achieved when all of the population is in equilibrium (none of the population exceeds carrying capacity)Equilibrium - a stable, balanced, or unchanged ecosystem