ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism ...

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ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome

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Transcript of ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism ...

Page 1: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION.

Population Ecology

Organism Population Community Ecosystem Biome

Page 2: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Population Ecology

Population:all the organisms that both belong to the same group or species and live in the same geographical area

Specific species at the same place at the same time

Example:1,738 trout in Kentucky Lake in 1986

Page 3: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Population Size

The size of a population is always changing!

Four factors affect the size of a population:Immigration (coming in)BirthsEmigration (leaving)Deaths

Page 4: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Population Density

Population Density:The number of individuals that live in

a defined areaHelps scientists determine how

crowded an area is

Formula:# of individualsArea

(units2)

= population density

Page 5: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Population Growth

Population growth is based on available resources.

FOOD

WATER

SHELTER

Page 6: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Population Growth

Exponential Growth (J curve)Rapid population increase due to an abundance of resources.

Page 7: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Population Growth

Logistic Growth (s curve)Due to a population facing limited resourcesNo more will fit!!!

Page 8: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Population Growth

Carrying CapacityThe maximum number of individuals that the environment can support

When resources run out the population cannot keep growing

Page 9: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Population Growth

Ecological Factors limit population

growth.

Limiting Factors:Something that keeps the size of a population down

Page 10: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Limiting Factors

Density-dependent limiting factors:Depend on the number of individuals in a given area.

Examples: Predation Competition (competing for resources)

Parasitism & diseaseHave a larger effect in densely populated areas

Page 11: ECOLOGISTS STUDY ENVIRONMENTS AT DIFFERENT LEVELS OF ORGANIZATION. Population Ecology Organism Population Community Ecosystem Biome.

Limiting Factors

Density-independent limiting factors:Limit a population’s growth regardless of the number of individuals

Examples: Unusual weather Natural disasters Human activities


Cells Unit. Biome Ecosystem Community Population Organism Organ System Organs Tissue Cells Organelle Molecules Discuss in Ecology.

Cells Unit. Biome Ecosystem Community Population Organism Organ System Organs Tissue Cells Organelle Molecules Discuss in Ecology.

55.2 How Do Ecologists Study Population Dynamics? To understand population growth, ecologists must measure population processes as well as population traits.

55.2 How Do Ecologists Study Population Dynamics? To understand population growth, ecologists must measure population processes as well as population traits.

1 1 Population Distribution and Abundance. 2 2 Introduction Ecologists usually define a population as a group of individuals of a single species inhabiting.

1 1 Population Distribution and Abundance. 2 2 Introduction Ecologists usually define a population as a group of individuals of a single species inhabiting.

Biomes Notes What is the difference between a Biome and an Ecosystem? Biosphere Biome Ecosystems are Ecosystem part of Biomes Community Population.

Biomes Notes What is the difference between a Biome and an Ecosystem? Biosphere Biome Ecosystems are Ecosystem part of Biomes Community Population.

Slide 1 of 21 Levels of Organization Copyright Pearson Prentice Hall Ecosystem Community Population Individual Biome Biosphere.

Slide 1 of 21 Levels of Organization Copyright Pearson Prentice Hall Ecosystem Community Population Individual Biome Biosphere.

Population Change Chapter 8. Principles of Population Ecology Population ecologists ask: 1) How many are in the population? 2) Are its numbers increasing.

Population Change Chapter 8. Principles of Population Ecology Population ecologists ask: 1) How many are in the population? 2) Are its numbers increasing.

Terrestrial biomes of the world Lecture Topics: n Biome concept n Biome classification, distribution n Biome climate patterns (Walters Diagrams) n Biome.

Terrestrial biomes of the world Lecture Topics: n Biome concept n Biome classification, distribution n Biome climate patterns (Walters Diagrams) n Biome.

13.1 Ecologists Study Relationships Review Vocab: Organism Population New Vocab: Ecology Community Ecosystem Biome KEY CONCEPT Ecology is the study of.

13.1 Ecologists Study Relationships Review Vocab: Organism Population New Vocab: Ecology Community Ecosystem Biome KEY CONCEPT Ecology is the study of.

Principles of Population Ecology Population ecologists ask: 1) How many are in the population? 2) Are its numbers increasing / decreasing? 3) What is its.

Principles of Population Ecology Population ecologists ask: 1) How many are in the population? 2) Are its numbers increasing / decreasing? 3) What is its.

Population Growth Chapter 5. How do ecologists study populations? Geographic range: where are they distributed? Density and distribution: in what manner.

Population Growth Chapter 5. How do ecologists study populations? Geographic range: where are they distributed? Density and distribution: in what manner.

Human Ecologists: Generalists by Design

Human Ecologists: Generalists by Design

54 Population Ecology. 54 Population Ecology 54.1 How Do Ecologists Study Populations?54.1 How Do Ecologists Study Populations? 54.2 How Do Ecological.

54 Population Ecology. 54 Population Ecology 54.1 How Do Ecologists Study Populations?54.1 How Do Ecologists Study Populations? 54.2 How Do Ecological.

How do plant ecologists use matrix population models?matrix models and asking how we can use many short-term studies to understand long-term population dynamics. Keywords Conservation,

How do plant ecologists use matrix population models?matrix models and asking how we can use many short-term studies to understand long-term population dynamics. Keywords Conservation,

Organism Population Community Ecosystem Biome Biosphere.

Organism Population Community Ecosystem Biome Biosphere.

Approaches to population environment researchwiki.dpi.inpe.br/lib/exe/fetch.php?media=ser457... · Malthusian and neo-Malthusian approaches. Ecologists assuming equilibrium dynamics,

Approaches to population environment researchwiki.dpi.inpe.br/lib/exe/fetch.php?media=ser457... · Malthusian and neo-Malthusian approaches. Ecologists assuming equilibrium dynamics,

Just to refresh your memory… Biosphere You are here Biome Ecosystem Community Population Organism.

Just to refresh your memory… Biosphere You are here Biome Ecosystem Community Population Organism.

Pretest Unit 3: Population Ecology 1.What is a population and how do ecologists study it 2.Explain the difference between a niche and habitat 3.Explain.

Pretest Unit 3: Population Ecology 1.What is a population and how do ecologists study it 2.Explain the difference between a niche and habitat 3.Explain.

Small mammals: their productivity and population dynamics · Small mammal ecologists began to approach ecosystem and/or population function from the point of view of energy flow by

Small mammals: their productivity and population dynamics · Small mammal ecologists began to approach ecosystem and/or population function from the point of view of energy flow by

How Populations Grow. Learning Objectives Describe how ecologists study populations. Identify factors that affect population growth. Describe exponential.

How Populations Grow. Learning Objectives Describe how ecologists study populations. Identify factors that affect population growth. Describe exponential.

Population and Community Ecology Chapter 35. Population Density Ecologists often describe a population in terms of its density. Ecologists often describe.

Population and Community Ecology Chapter 35. Population Density Ecologists often describe a population in terms of its density. Ecologists often describe.