BIO 203 Lecture Notes - Quadrat, Microsoft Powerpoint

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mag74

20 Nov 2022

School

CSU

Department

Biology

Course

BIO 203

Professor

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Document Summary

Lab 2 patterns of spatial distribution: a. 3. 17/1. 08= 2. 94: to determine the distribution pattern of a sample or population, there must be quadrats created. These are small areas of the sample in which researchers can count how many entities are in random quadrats that are set up (rauschert, gibbson, and gore panter 2021). Then, calculate the mean and the variance for each data set. To do this, take the sum of all the data collected and then divide it by the number of samples taken (urry et. al. For the variance, calculate deviation and subtract it from each group of individuals per quadrant. Then, sum up those numbers and divide them by how many samples are taken, minus one (rauschert, gibbson, and gore panter 2021). Finally, calculate the variance-to-mean ratio or the index of dispersion. To do this, take the individuals variance and divide it by the mean (rauschert, gibbson, and gore panter 2021).

Related Questions

The northern red backed vole (clethrionomys rutilus) is a mouselike animal that lives in the arctic. A random sampling surveyusing ten 1m? quadrats collected the following data on the numberof voles per quadrat:

2,0, 4,1,5,3,0,4,2,1

Assume that the entire sampling area contains suitable habitatfor the voles.

a) Using the data provided, estimate the population size ofvoles if the habitat has an ecological area of 230m?. Show yourwork.(3 marks)

b) WHat dispersion pattern best describes the distribution ofvoles sampled in this study?( 1 mark)

burgundyraccoon433

As part of lab this week, you will test for pattern of distribution at small scales, where organisms may show random, regular, or clumped distribution. Clumped distributions are particularly interesting because they may emerge from a patchy distribution of underlying conditions or from mutual attraction within individuals. Letâs say that you observe several dense patches of jellyfish in Puget Sound. How could you tell whether these patches were caused by locally good conditions or because jellyfish benefit from being in a group?

True or false?
A) If jellyfish benefit from being in a group, then their density variance to mean ratio will decline over time
B) If jellyfish deplete locally good conditions, then their density variance to mean ratio will decline over time.
C) If jellyfish benefit from being in a group, then thinning a patch will improve the performance of remaining jellyfish.
D) If jellyfish occur in locally good conditions, then thinning a patch will improve the performance of remaining jellyfish.

amaranthbear314

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.

Individuals who live in social groups are usually found in a ________________ distribution.

	a. patterned
	b. clumped
	c. uniform
	d. random

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

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.

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.

Individuals who live in social groups are usually found in a ________________ distribution.

	a. patterned
	b. clumped
	c. uniform
	d. random

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

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.

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.

Individuals who live in social groups are usually found in a ________________ distribution.

	a. patterned
	b. clumped
	c. uniform
	d. random

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

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.

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.

Individuals who live in social groups are usually found in a ________________ distribution.

	a. patterned
	b. clumped
	c. uniform
	d. random

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

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.

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.

Individuals who live in social groups are usually found in a ________________ distribution.

	a. patterned
	b. clumped
	c. uniform
	d. random

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

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.