Population Dynamics.

Slides:



Advertisements
Similar presentations
Population Ecology.
Advertisements

Population in Ecology.
Population Dynamics.
Chapter 4 Population Ecology
Population Ecology.
Population Ecology. Population Dynamics Population: all the individuals of a species that live together in an area Demography: the statistical study of.
What Shapes an Ecosystem? Review of Biotic and Abiotic Factors Ecosystems are influenced by a combination of biological and physical factors. Biotic.
Biology Bellwork – 10/17/12 Describe some observations you can make about populations of insects over the course of a year? The populations of flies or.
Population Ecology. Population Dynamics Population: All the individuals of a species that live together in an area.
Unit 7 Ecology.
Population Ecology. Population Dynamics Population: All the individuals of a species that live together in an area Demography: The statistical study of.
Population Dynamics Biology.
Ecosystem Interactions Honors Biology Chapter 14.
Population Dynamics SOL BIO 9a. BIO SOL: 9a The student will investigate and understand dynamic equilibria within populations, communities, and ecosystems.
1 This is Jeopardy Chapter 20 -Populations 2 Category No. 1 Category No. 2 Category No. 3 Category No. 4 Category No Final Jeopardy.
Population Dynamics – Growth Rates Chapter 4. Learning Targets I can… 1. Explain the concept of carrying capacity 2. Model how limiting factors and organism.
Chapter 4: Population Biology
POPULATIONS & CARRYING CAPACITY
Population Dynamics SB4 a & d. The student will investigate and understand dynamic equilibria within populations, communities, and ecosystems. Key concepts.
Population Ecology. Population Dynamics Population: All the individuals of a species that live together in an area Demography: The statistical study of.
Population Ecology. Population Dynamics Population: All the individuals of a species that live together in an area Demography: The statistical study of.
POPULATION DYNAMICS Population: All the individuals of a species that live together in an area Demography: The statistical study of populations, allows.
Population Dynamics. Population Ecology Population: all the individuals of a species that live together in the same area Branch of ecology that studies.
Population Ecology Chapter 5, Section 3. Population Dynamics Population: all the individuals of a species that live together in an area Demography: the.
Population Ecology Honors Biology Ms. Day Lecture #46.
Section 1: Population Dynamics
Population Ecology 1.
Population Dynamics SOL BIO 9a.
Population Dynamics!.
During the 1990s, the United States experienced high levels of immigration (people moving to the United States), which contributed to slow population increase.
Population Ecology.
Reproduction Patterns
Population Ecology.
POPULATIONS & CARRYING CAPACITY
Population Dynamics.
Environmental Science Do Now
Population Dynamics The study of population characteristics and how they change over time Although several species may share a habitat they each have.
Population Dynamics.
Population Dynamics.
Population and Community Ecology
Population Ecology.
Population Dynamics SOL BIO 9a.
Population Ecology.
Population Ecology.
Population Ecology.
Population in Ecology.
Population Ecology.
Population Ecology.
Ch. 8 Env. Science Ch. 5 Biology
Population Ecology.
Population Ecology.

Population Ecology.
EQ: How do we measure populations?
Population Dynamics
If I want to be successful by the end of the unit I will be able to:
Population Ecology Do Not Write Down anything in YELLOW!
Population Dynamics.
Population Dynamics.
Population Ecology.
Population Ecology.
Populations Mrs. Passmore
Population Ecology.
Population Dynamics SOL BIO 9a.
Population Dynamics.
Population Ecology.
Population Ecology.
Population Ecology.
Population Dynamics.
Presentation transcript:

Population Dynamics

Population Dynamics Population: all the individuals of a species that live together in an area Demography: the statistical study of populations, make predictions about how a population will change Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

Population Dynamics Three Key Features of Populations Size Density Dispersion (clumped, even/uniform, random) Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

Three Key Features of Populations 1. Size: number of individuals in an area Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

Three Key Features of Populations Growth Rate: Birth Rate (natality) - Death Rate (mortality) How many individuals are born vs. how many die Birth rate (b) − death rate (d) = rate of natural increase (r). Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

POST-REPRODUCTIVE REPRODUCTIVE PRE-REPRODUCTIVE

Population of a Stable Country  

You decide!

Three Key Features of Populations 2. Density: measurement of population per unit area or unit volume Formula: Dp= N Pop. Density = # of individuals ÷ unit of space Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat. S

4 Factors that affect density 1. Immigration- movement of individuals into a population 2. Emigration- movement of individuals out of a population

4 Factors that affect density 3. Density-dependent factors- Biotic factors in the environment that have an increasing effect as population size increases   Ex. disease competition parasites

4 Factors that affect density 4. Density-independent factors- Abiotic factors in the environment that affect populations regardless of their density   Ex. temperature storms habitat destruction drought

Factors That Affect Future Population Growth Immigration + + - Population Mortality Natality - Emigration

Three Key Features of Populations 3. Dispersion:describes their spacing relative to each other clumped even or uniform random Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

clumped even (uniform) random Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat. random

Population Dispersion

Other factors that affect population growth Limiting factor- any biotic or abiotic factor that restricts the existence of organisms in a specific environment. EX.- Amount of water Amount of food Temperature

Limiting Factor- Zone of Tolerance Few organisms present None Few organisms present None Many organisms present Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

Other factors that affect population growth Carrying Capacity- the maximum population size that can be supported by the available resources There can only be as many organisms as the environmental resources can support Although several species may share a habitat they each have their own niche. A niche is a very narrow range where a species fits within a habitat.

J-shaped curve (exponential growth) Carrying Capacity Nu m b e r J-shaped curve (exponential growth) Carrying Capacity (k) S-shaped curve (logistic growth) Ok so Time

2 Life History Patterns 1. R Strategists short life span small body size reproduce quickly have many young little parental care Ex: cockroaches, weeds, bacteria

2 Life History Patterns 2. K Strategists long life span large body size reproduce slowly have few young provides parental care Ex: humans, elephants

Human Population Growth

Human Population Growth

Time unit Births Deaths Natural increase Year 130,013,274 56,130,242 73,883,032 Month 10,834,440 4,677,520 6,156,919 Day 356,201 153,781 202,419 Hour 14,842 6,408 8,434 Minute 247 107 141 Second 4.1 1.8 2.3