Ecology - PowerPoint PPT Presentation

Loading...

PPT – Ecology PowerPoint presentation | free to download - id: 6a16fc-NmVkM



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Ecology

Description:

Ecology Ecology is the scientific study of the interaction between organisms and between organisms and their environment. – PowerPoint PPT presentation

Number of Views:3
Avg rating:3.0/5.0
Slides: 29
Provided by: LakeSt3
Category:

less

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

Title: Ecology


1
Ecology
  • Ecology is the scientific study of the
    interaction between organisms and between
    organisms and their environment.

2
  • How do animals benefit plants?

3
  • What non-living things in their environment do
    organisms interact with?

4
Levels of Organization
  • 1. Biosphere
  • 2. Biome
  • 3. Ecosystem
  • 4. Community
  • 5. Population
  • 6. Organism

5
  • Can a group of rabbits and a group of field mice
    make up the same population?

6
  • Could a biome near Brazil be the same as a biome
    in northern Canada?

7
Ecosystems
  • An ecosystem
  • consists of a given areas
  • (______________) and
  • (______________).
  • physical features

abiotic factors
living organisms
biotic factors
8
Abiotic factors
  • nonliving physical parts of an ecosystem such as
    _______________ type, rocks, temperature,
  • _______________, and rainfall.

water, sunlight, soil
humidity, elevation
  • Wind Can affect the pattern of a plants growth

9
Biotic Factors
  • living aspects of an ecosystem such
    as_____________
  • _______________, worms, amoebas, and waterlilies.

fishes, frogs,
insects, snails,
10
Habitats
Ecosystems contain Habitats,

the location or surrounding where the organism
lives
11
Niches,
  • the behavior of organisms in their habitats.

12
Community
  • organisms living together in an ecosystem

13
Ecological Methods
  • Scientists conduct research using 3 basic
    approaches.
  • 1. Observing could be behavior observations
    about an animal.
  • 2. Experimenting test a hypothesis
  • 3. Modeling gain insight into complex phenomena
    like global warming.

14
Notes 3-2 Energy Flow
  • Sunlight is the main energy source for life on
    Earth.
  • Autotrophs capture energy from sunlight and use
    that energy to produce food. Also called
    producers.

15
Producers
  • Photosynthesis is responsible for adding oxygen
    toand removing carbon dioxide fromEarth's
    atmosphere.

16
  • Heterotrophs rely on other organisms for their
    energy and food supply. Also called consumers.
  • Herbivores eat plants
  • Carnivores eat animals
  • Omnivores eat both
  • Detritivores eat dead matter (mites, worms,
    snails, crabs

17
Food Chains
  • Food Chains a series of steps in which
    organisms transfer energy by eating and being
    eaten.
  • Example plankton dragonfly-salamander-snake

18
  • C. Feeding Relationships
  • 1.    Food chain
  • a. chains are found in
    harsh climates like the desert and tundra .
  • b.  Desert or tundra areas are
  • than those found in more moderate
    climatic influences e.g.
  • follow the progression of energy
    flow from one organism to another or who eats
    whom.

shorter food
less stable and more easily destroyed
  • tropical rain forests.

19
Food Web
  • Food Web links all the food chains in an
    ecosystem together.

20
Trophic Level
  • Each step in a food chain/web is called a trophic
    level.
  • (herbivore)

21
Pyramids 3 types
  • 1. Energy Pyramid transfer of energy from one
    trophic level to the next. Measured in kcals.
  • 10 rule - only 10 of the energy is
    transferred from one trophic level to the next.
  • Why?
  • It is lost in respiration, movement and
    reproduction.

22
Ecological Pyramids
0.1 Third-level consumers
1 Second-level consumers
10 First-level consumers
100 Producers
23
  • Suppose that the base of an energy pyramid
    consists of plants that contain 450,000calories
    of food energy. If the plants were eaten by mice
    and insects, how much food energy would be
    available to those first-level consumers?
  • How about the second-level consumers that at the
    mice and insects?
  • How about the third-level consumer?

24
  • First-level consumer would have 45,000 calories
    available
  • Second-level consumer would have 4500 calories
    available.
  • Third-level consumer would have 450 calories
    available.

25
Feeding Relationships
  • Energy flows through an ecosystem in one
    direction, from the sun or inorganic compounds to
    autotrophs (producers) and then to various
    heterotrophs (consumers).

26
Energy Pyramids Contd
  • 100 K/cals
  • 1,000 K/cals
  • 10,000 K/cals

27
Types of Pyramids
  • 2. Biomass Pyramid transfer of biomass from
    one trophic level to the next.

28
Types of Pyramids
  • 3. Pyramid of Numbers the total number of
    individuals at each trophic level. (may not look
    like a pyramid)
About PowerShow.com