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Nov 21, 2023 ·

**R**-selected species are those that have shorter lifespans, are generally smaller, produce many young, and exhibit exponential**growth**. Elephants are K-selected species and frogs are...- 6 min

The value of

**r**can be positive, meaning the**population**is increasing in size (the rate of change is positive); or negative, meaning the**population**is decreasing in size; or zero, in which case the**population**size is unchanging, a condition known as zero**population****growth**.People also ask

What does R mean in population growth?

What determines the growth rate of a population?

What is the maximum per capita growth rate for a population?

What is the global population growth rate?

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K and

**r**are two extremes for a range of**population growth**strategies, no one strategy is better or best. Identify the characteristics associated with K selected and**r**selected species. Volunteer here: https://www.khanacademy.org/contribute. Created by Khan Academy.- 7 min

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When the per capita rate of increase (

**r**) takes the same positive value regardless of the**population**size, then we get exponential**growth**. When the per capita rate of increase (**r**) decreases as the**population**increases towards a maximum limit, then we get logistic**growth**.Student Objectives Explain what a

**population**is in ecology. Describe what**r**, K, and N 0 are in a**population**. Analyze how**r**, K, and N 0 can change**population**sizes over time both individually and together.**Population growth**is the increase in the number of people in a**population**or dispersed group. Actual global human**population growth**amounts to around 83 million annually, or 1.1% per year. [2] The global**population**has grown from 1 billion in 1800 to 7.9 billion in 2020. [3]