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BS276 Lecture Notes - Growth Factor, Limiting Factor, Paramecium

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wrygaard6
9 Dec 2022
School
University of the Sciences
Department
Biological Sciences
Course
BS276
Professor

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Document Summary

Size (n): total # of individuals in a given area at a given time. High density = higher competition, possibility for disease outbreak, possibility of depleting food source. Distribution: how individuals in a population are spaced out compared to each other. Die-off or bottleneck effect can lead to skewed sex ratio (not enough females) limiting population growth. Density-dependent factors: factors that influence population growth based on size. Ex. food, competition for habitat, water, light, even disease. All of these things limit population growth based on their size; aka - small populations don"t experience these, large populations do. Density-independent factors: factors that influence population growth independent of their size. Ex. natural disasters (flood, hurricane, tornado, fire) It doesn"t matter how big or small a population is, natural disasters limit them both. Food is a density-dependent factor (also a limiting resource) When twice as much food was added to the dish, both species (paramecium) increased carrying capacity by about 2x.

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Related Questions

The number of individuals in a given area, such as an acre or a square mile, is a measurement known as:
a. population size.
b. minimum viable population.
c. population distribution.
d. population density.
2. Individuals who live in social groups are usually found in a ________________ distribution.
a. patterned
b. clumped
c. uniform
d. random
3. Under what conditions might we see exponential population growth?
a. When the population is large and approaching carrying capacity
b. When there is a sudden influx of a new food source
c. When there are enough predators around to keep the population in check
d. When a population has exceeded carrying capacity
4. What kind of things might cause a population experiencing exponential growth to transition to logistic growth?
a. The loss of that population's main predator
b. The emergence of a new food source such as ripening fruit on a tree
c. More competition for food from other species in the area
d. All of these could spur the transition.
5. Which of the following is an example of a density-independent factor for population growth?
a. Fire
b. Predators
c. Competition for nesting sites
d. Food availability
The number of individuals in a given area, such as an acre or a square mile, is a measurement known as:
a. population size.
b. minimum viable population.
c. population distribution.
d. population density.
2. Individuals who live in social groups are usually found in a ________________ distribution.
a. patterned
b. clumped
c. uniform
d. random
3. Under what conditions might we see exponential population growth?
a. When the population is large and approaching carrying capacity
b. When there is a sudden influx of a new food source
c. When there are enough predators around to keep the population in check
d. When a population has exceeded carrying capacity
4. What kind of things might cause a population experiencing exponential growth to transition to logistic growth?
a. The loss of that population's main predator
b. The emergence of a new food source such as ripening fruit on a tree
c. More competition for food from other species in the area
d. All of these could spur the transition.
5. Which of the following is an example of a density-independent factor for population growth?
a. Fire
b. Predators
c. Competition for nesting sites
d. Food availability
The number of individuals in a given area, such as an acre or a square mile, is a measurement known as:
a. population size.
b. minimum viable population.
c. population distribution.
d. population density.
2. Individuals who live in social groups are usually found in a ________________ distribution.
a. patterned
b. clumped
c. uniform
d. random
3. Under what conditions might we see exponential population growth?
a. When the population is large and approaching carrying capacity
b. When there is a sudden influx of a new food source
c. When there are enough predators around to keep the population in check
d. When a population has exceeded carrying capacity
4. What kind of things might cause a population experiencing exponential growth to transition to logistic growth?
a. The loss of that population's main predator
b. The emergence of a new food source such as ripening fruit on a tree
c. More competition for food from other species in the area
d. All of these could spur the transition.
5. Which of the following is an example of a density-independent factor for population growth?
a. Fire
b. Predators
c. Competition for nesting sites
d. Food availability
The number of individuals in a given area, such as an acre or a square mile, is a measurement known as:
a. population size.
b. minimum viable population.
c. population distribution.
d. population density.
2. Individuals who live in social groups are usually found in a ________________ distribution.
a. patterned
b. clumped
c. uniform
d. random
3. Under what conditions might we see exponential population growth?
a. When the population is large and approaching carrying capacity
b. When there is a sudden influx of a new food source
c. When there are enough predators around to keep the population in check
d. When a population has exceeded carrying capacity
4. What kind of things might cause a population experiencing exponential growth to transition to logistic growth?
a. The loss of that population's main predator
b. The emergence of a new food source such as ripening fruit on a tree
c. More competition for food from other species in the area
d. All of these could spur the transition.
5. Which of the following is an example of a density-independent factor for population growth?
a. Fire
b. Predators
c. Competition for nesting sites
d. Food availability
The number of individuals in a given area, such as an acre or a square mile, is a measurement known as:
a. population size.
b. minimum viable population.
c. population distribution.
d. population density.
2. Individuals who live in social groups are usually found in a ________________ distribution.
a. patterned
b. clumped
c. uniform
d. random
3. Under what conditions might we see exponential population growth?
a. When the population is large and approaching carrying capacity
b. When there is a sudden influx of a new food source
c. When there are enough predators around to keep the population in check
d. When a population has exceeded carrying capacity
4. What kind of things might cause a population experiencing exponential growth to transition to logistic growth?
a. The loss of that population's main predator
b. The emergence of a new food source such as ripening fruit on a tree
c. More competition for food from other species in the area
d. All of these could spur the transition.
5. Which of the following is an example of a density-independent factor for population growth?
a. Fire
b. Predators
c. Competition for nesting sites
d. Food availability

A population of a species exhibits logistic growth. If thecarrying capacity of their habitat is 240 individuals and r = 0.3(individuals per month), what is the maximum population growth ratefor the population? Show all your work.

What characteristic(s) should a sample have to be representative of the population?

Carefully selected to possess all the phenotypes in question
Randomly selected
At least 50% of the total population size
Large enough to include every individual in the population