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topic 4

QuestionAnswer
What is exponential growth? population increase under ideal conditions
What shape is an exponential curve? J-shaped
What limits exponential growth? resource depletion
What formula represents exponential growth? dN/dt = rN
What is logistic growth? growth that slows near carrying capacity
What shape is a logistic curve? S-shaped
What formula represents logistic growth? dN/dt = rN(K–N)/K
What is carrying capacity (K)? maximum sustainable population size
When does growth rate slow in logistic growth? as N approaches K
What happens when population exceeds K? resources become limited
What are life history traits? characteristics affecting reproduction and survival
What is age at first reproduction? when an organism starts reproducing
What is K-selection? traits favored near carrying capacity
What is r-selection? traits maximizing reproductive success in uncrowded areas
What type of environment favors K-selection? stable and high-density
What type favors r-selection? unstable and low-density
What is density-dependent regulation? growth changes with population density
What is density-independent regulation? factors affect all populations equally
What are examples of density-dependent factors? competition, predation, disease
What are examples of density-independent factors? natural disasters, weather
What does competition do? lowers birth rates and increases death rates
What is territoriality? defending space to reduce competition
What is a limiting resource? resource in shortest supply limiting growth
What do predators regulate? prey population size
What are intrinsic factors? internal physiological or behavioral limits
What is population dynamics? population fluctuations over time
What is a stable population? births = deaths
What is human population growth type? logistic with delayed stabilization
Created by: aayush123654
 

 



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