Lesson Overview - PowerPoint PPT Presentation

Loading...

PPT – Lesson Overview PowerPoint presentation | free to download - id: 7b3e38-MTkyN



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Lesson Overview

Description:

Lesson Overview 3.1 What Is Ecology? Studying Our Living Planet What is ecology? Ecology is the scientific study of interactions among organisms and between organisms ... – PowerPoint PPT presentation

Number of Views:12
Avg rating:3.0/5.0
Slides: 24
Provided by: alex1179
Learn more at: http://mrspotteiger.weebly.com
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Lesson Overview


1
Lesson Overview
  • 3.1 What Is Ecology?

2
Studying Our Living Planet
  • What is ecology?
  • Ecology is the scientific study of interactions
    among organisms and
  • between organisms and their physical environment.

3
Studying Our Living Planet
  • The biosphere consists of all life on Earth and
    all parts of the Earth in which life exists,
    including land, water, and the atmosphere.
  • The biosphere extends from about 8 km above
    Earths surface to as far as 11 km below the
    surface of the ocean.

4
The Science of Ecology
  • Ecology is the scientific study of interactions
    among and between organisms and their physical
    environment.
  • Interactions within the biosphere produce a web
    of interdependence between organisms and the
    environments in which they live.

5
The Science of Ecology
  • Organisms respond to their environments and can
    change their environments, producing an
    ever-changing biosphere.

6
Ecology and Economics
  • Economics is concerned with interactions based
    on money.
  • Economics and ecology share the same word root.
    Indeed, human economics and ecology are linked.
    Humans live within the biosphere and depend on
    ecological processes to provide such essentials
    as food and drinkable water that can be bought
    and sold for money.

7
Levels of Organization
  • Ecological studies may focus on levels of
    organization that include the following
  • Individual organism
  • On bison represents
  • an individual organism

8
Levels of Organization
  • Ecological studies may focus on levels of
    organization that include the following
  • Populationa group of individuals that belong to
    the same species and live in the same area

A herd of bison (called a gang scientifically)
represents a population of bison in an area.
9
Levels of Organization
  • Ecological studies may focus on levels of
    organization that include the following
  • Communityan assemblage of different populations
    that live together in a defined area

The bison and elk (along with many other animals
that live in Yellowstone Park) make up the
community of organisms.
10
Levels of Organization
  • Ecological studies may focus on levels of
    organization that include the following
  • Ecosystemall the organisms that live in a
    place, together with their physical environment

The animals, plants, soil, air and water in
Yellowstone Park are all part of the Yellowstone
ecosystem.
11
Levels of Organization
  • Ecological studies may focus on levels of
    organization that include the following
  • Biomea group of ecosystems that share similar
    climates and typical organisms

Where we live in Wallace is part of the
coniferous forest biome that stretches around the
globe (see the light pink areas on the diagram at
right).
12
Levels of Organization
  • Ecological studies may focus on levels of
    organization that include the following
  • Biosphereour entire planet, with all its
    organisms and physical environments

YOU ARE HERE!
13
Biotic and Abiotic Factors
  • What are biotic and abiotic factors?

14
Biotic and Abiotic Factors
  • What are biotic and abiotic factors?
  • The biological influences (living things) on
    organisms are called biotic factors. Physical
    components of an ecosystem (non living things)
    are called abiotic factors.

15
Biotic Factors
  • A biotic factor is any living part of the
    environment with which an organism might
    interact, including animals, plants, mushrooms
    and bacteria.
  • Biotic factors relating to a bullfrog might
    include algae it eats as a tadpole, the herons
    that eat bullfrogs, and other species competing
    for food or space.

16
Abiotic Factors
  • An abiotic factor is any nonliving part of the
    environment, such as sunlight, heat,
    precipitation, humidity, wind or water currents,
    soil type, etc.
  • For example, a bullfrog could be affected by
    abiotic factors such as water availability,
    temperature, and humidity.

17
Biotic and Abiotic Factors Together
  • The difference between abiotic and biotic
    factors is not always clear. Abiotic factors can
    be influenced by the activities of organisms and
    vice versa.
  • For example, pond muck contains nonliving
    particles, and also contains mold and decomposing
    plant material that serve as food for bacteria
    and fungi.

18
Biotic and Abiotic Factors Together
  • In addition, trees and shrubs affect the amount
    of sunlight the shoreline receives, the range of
    temperatures it experiences, the humidity of the
    air, and even the chemical conditions of the
    soil.
  • A dynamic mix of biotic and abiotic factors
    shapes every environment.

19
Ecological Methods
  • What methods are used in ecological studies?

20
Ecological Methods
  • What methods are used in ecological studies?
  • Regardless of their tools, modern ecologists use
    three methods in their work observation,
    experimentation, and modeling. Each of these
    approaches relies on scientific methodology to
    guide inquiry.

21
Observation
  • Observation is often the first step in asking
    ecological questions.
  • Questions may form the first step in designing
    experiments and models.

What kind of questions might be asked if you came
upon this scene while studying a river?
22
Experimentation
  • Experiments can be used to test hypotheses.
  • An ecologist may set up an artificial
    environment in a laboratory or greenhouse, or
    carefully alter conditions in selected parts of
    natural ecosystems.

After finding the dead fish in the river, you
might take samples of the water and test them for
chemicals.
23
Modeling
  • Many ecological events occur over such long
    periods of time or over such large distances that
    they are difficult to study directly.
  • Ecologists make models to help them understand
    these phenomena.

You might set up an aquarium that simulated the
conditions in the river and change things to see
how it affects the fish.
About PowerShow.com