Population Dynamics Presented by: From T.A. Blakelock High School.

Slides:

Advertisements

Similar presentations

Chapter 7 The Human Population.

Advertisements

Chapter 7 The Human Population.

Chapter 5 Review PP Sections 1, 2, and 3.

Population Growth Ecology CFU#1 Lesson #3. SWBAT how birth/death rates affect population size. You will create a graph representing human population growth.

POPULATION DENSITY, DISTRIBUTION & GROWTH.  Density is a measure of how closely packed organisms are in a population  Calculated by … DENSITY # of individuals.

Demographic Transition Model. Getting control of birth and death rates can be illustrated through the Demographic Transition Model – 1930s American Warren.

Population Ecology Chapter 19.

Do now 02/27  What are some things that might be a result of the growth of the human population? What are some effects?  DO NOW 03/02  How do you think.

Human Population Dynamics. How do populations change Immigration – movement of people or species into a population Emmigration – movement of people or.

Ecology: Populations. Characteristics of Populations 1.Geographic distribution 2.Density 3.Growth Rate 4.Age Structure.

“People are everywhere. Some People say that there are too Many of us, but no one Wants to leave.”

Population Ecology. What is a population A group of individuals of a species that live in an area and rely on the same resources for survival often interacting.

State Standard SB4A. Investigate the relationships among organisms, populations, communities, ecosystems, and biomes. SB4D. Assess and explain human.

“People are everywhere. Some People say that there are too Many of us, but no one Wants to leave.”

Sustainability and Globalization. Sustainability: “meet the needs of the present without compromising the ability of future generations to meet their.

Population Dynamics 3: Human Populations Trends in Human Population Growth Demography: the study of statistics related to human populations, such as.

Populations and Communities Section 1 Section 1: Populations Preview Bellringer Key Ideas What Is a Population? Population Growth Factors that Affect Population.

POPULATIONSDefinition: All the members of a species that live in one place at one time.

POPULATIONS 1. HOW POPULATIONS GROW OBJECTIVES: 5.1 List the characteristics used to describe a population. Identify factors that affect population size?

Honors Biology – Chapter 5

Sustainability Definition: approach to development that meets the needs of the present without negatively affecting the ability of future generations to.

Do now: Look at the flask of bacteria. Bacteria can double in number every 20 minutes. However, at some point, the doubling stops? Why do you think this.

NOTES Ch 15 #3 2/13 POPULATION STUDIES. When animals first inhabit an area, there are only a few males and females. They have offspring..those grow up.

Chapter 5 Populations. Chapter 5 Sec 1: How Populations Grow There are three important characteristics of a population:  _________________________ distribution.

POPULATIONS. 1. S curve = Logistic growth Resource availability will cause the population to level off over time When we look at how populations grow,

Ecology 2b- Population Growth & Limiting Factors.

K = K = K = 100.

Chapter 4 Section 1. Population Growth  6.2 billion people live on the earth.  People live on 30% of the planets land.  By 2025 the population should.

Population Growth. Current Populations World population is ~ 7 billion U.S. population is 313 million Louisiana population is 4 ½ million.

Populations. Researchers study  Geographic range  Density distribution  Growth rate  Age structure.

5.3 Populations Exponential growth  Population growth in which the rate of growth in each generation is a multiple of the previous generation. This occurs.

Chapter 16, sections 1, 2, 3, 5 Biology Unit 2: Human Impact on Ecosystems 1.

Chapter 7 highlights APES 2015 Mrs. Thompson. Key Ideas Discuss the Earth’s carrying capacity and limiting factors for the human population Describe human.

Notes pg 103 Title: Populations How do populations change over time? What makes them change?

State Standard SB4A. Investigate the relationships among organisms, populations, communities, ecosystems, and biomes. SB4D. Assess and explain human activities.

Chapter 7 The Human Population. Scientists Disagree on Earth’s Carrying Capacity Figure 7.1.

Population Ecology. Population Dynamics Population: All the individuals of a species that live together in an area Demography: The statistical study of.

“TOO MUCH IS NEVER ENOUGH” BIG IDEAS. Malthus Malthus could not possibly have known about the changes in agriculture, medicine, sanitation and housing.

Populations - Chapter 19.

Chapter 7 The Human Population.

Human Demographics.

Chapter 4: Pages September 26-27, 2016

During the 1990s, the United States experienced high levels of immigration (people moving to the United States), which contributed to slow population increase.

Unit 3: Populations Chapter 5.

D2.3 Changing Populations.

Chapter 4: Pages , 107 September 27-28, 2017

Chapter 4: Population Ecology

Modeling Human Population Growth

Population Growth, Limiting Factors & Natural Resources

KEY CONCEPT Populations grow in predictable patterns.

Human Population – Growth & Age Structure (4.2)

Bullet 2: Fluctuations in Population Growth

KEY CONCEPT Populations grow in predictable patterns.

A Growing Human Population

Population Growth Patterns

Human Population Growth

Balance in the Ecosystem

Presented by Mr. Rainbeau

Ecology POPULATIONS.

A Growing Human Population

Day 106 – Population Growth

NOTES 31 – Population Ecology

Logistic Growth Growth of a population slows or stops as resources become less available S curve.

The Human Population The Environmental Implications of China’s Growing Population China has 20% of the world’s population (1.3 billion) Currently the.

Unit 2: Communities & Populations

Populations: Limits.

KEY CONCEPT Populations grow in predictable patterns.

KEY CONCEPT Populations grow in predictable patterns.

Human Population Growth

A group of individuals of the same species living in a particular area

Presentation transcript:

Population Dynamics Presented by: From T.A. Blakelock High School

Introduction Person 1 Person 2

Human Population Growth You will create a graph of human population growth and use it to predict future growth. Year# of People Year# of People

Did Your Graph Look Something Like this?

Graph Analysis It took 1649 years for the world population to double, going from.25 billion to.5 billion people. How long did it take the population to double again? Answer: 200 years How long did it take to double a second time? Answer: 75 years A third time? Answer: 51 years Based on your graph, how many years will it take the population of 2004 to double again? Answer: perhaps near 2050 it would reach 14 billion people. What factors contributed to the world’s overall population growth? Answer: industrialization, health care, sanitation, etc.

What would happen if today’s population doubled? How would this affect our Earth?

Carrying Capacity When populations have limited resources, they tend to experience a period of slow growth at the beginning, then a period of rapid growth, but as the resources become limited, the growth rate slows. Eventually, a population will reach the point where the birth rate equals the death rate. This is known as the carrying capacity. Carrying capacity can change over time depending on food supplies, disease, weather, predation, etc.)

How does this graph compare to the one you drew? What is Earth’s carrying capacity? What happens when we reach Earth’s carrying capacity?

Ecological Footprint So far humans have been able to alter Earth’s carrying capacity, but for how much longer? Ecological Footprint: the amount of productive land that is required for each person in a defined area for food, water, transportation, housing, waste management, etc. The average per person globally is 2 hectares of land. We are now going to roughly calculate each of our footprints…

How Can We Help? In small groups, come up with ways that you and your family can decrease your footprint. Pick two of your favourites to share with the class.

THANKS FOR LISTENING!!! Any Questions?