semester 2 day 2 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Semester 2, Day 2 PowerPoint Presentation
Download Presentation
Semester 2, Day 2

Loading in 2 Seconds...

play fullscreen
1 / 24

Semester 2, Day 2 - PowerPoint PPT Presentation


  • 110 Views
  • Uploaded on

Semester 2, Day 2. Ecosystem & Energy. Agenda. Turn in Cornell Notes & Question Responses Biodiversity Quiz Ecosystem Lecture 4 Minute Break Reading/Work Time Hand Quizzes back and review. Turn in Cornell Notes and Question Responses. Order Cornell Notes 34.1 Cornell Notes 34.2

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Semester 2, Day 2' - lance


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
semester 2 day 2

Semester 2, Day 2

Ecosystem & Energy

agenda
Agenda
  • Turn in Cornell Notes & Question Responses
  • Biodiversity Quiz
  • Ecosystem Lecture
  • 4 Minute Break
  • Reading/Work Time
  • Hand Quizzes back and review
turn in cornell notes and question responses
Turn in Cornell Notes and Question Responses
  • Order
    • Cornell Notes 34.1
    • Cornell Notes 34.2
    • Cornell Notes 34.3
    • Cornell Notes 34.4
    • Responses to Section 34.1-34.4 and Chapter 34 Review
  • Make sure that your name is on your notes/responses
  • Initial each following page
  • Keep the papers together, fold the corner if not stapled
biodiversity quiz
Biodiversity Quiz
  • Complete the quiz silently
  • When you are finished, place quiz facedown on desk
  • When everyone is finished, pass quizzes forward
ecosystem changes
Ecosystem Changes
  • How do certain changes affect an ecosystem?
    • Climate Changes
      • Temperature, flooding, global warming, freezing
        • Can eliminate entire biological communities
        • New communities will repopulate the area  NEW ECOSYSTEM!

From natural resources (volcanoes)

ecosystem changes1
Ecosystem Changes
  • How do certain changes affect an ecosystem?
    • Human Activity
      • Human-caused global warming, pesticides, deforestation, urban encroachment, endangered species, acid rain, water contamination, fossil fuels, dams for hydroelectricity, radioactive waste, oil spills, air pollution, soil erosion, salting roads, crop irrigation
        • All of these can kill populations, resulting in the entire ecosystem being disrupted
ecosystem changes2
Ecosystem Changes
  • How do certain changes affect an ecosystem?
    • Human Activity (cont.)

Smallmouth Bass

Dies from Lack

of Food

EFFECT

Spirogyra

Population

Explodes

EFFECT

Daphnia

Kill with

Pesticides

CAUSE

Bluegill

Dies from

Lack of Food

EFFECT

ecosystem changes3
Ecosystem Changes
  • How do certain changes affect an ecosystem?
    • Introduction of Non-Native / Invasive Species
      • Harmful
      • No predators
      • Displace native species
      • Carry disease
    • Population Size
      • Caused by humans
      • Example: Too many predators, prey die out, then predators die, and plants the prey ate grow out of control.
population size in ecosystem
Population Size in Ecosystem

BIRTH

DEATH

Rates that increase

population size

Rates that decrease

population size

Population

Size

IMMIGRATION

EMIGRATION

Organisms enter ecosystem

Organisms enter ecosystem

population size in ecosystem1
Population Size in Ecosystem
  • Graph of Births and Deaths. Look at the gap between births and deaths.

Births

Gap gets bigger

Therefore, population INCREASES

NumberofOrganisms

Deaths

Time

population size in ecosystem2
Population Size in Ecosystem
  • Graph of Births and Deaths. Look at the gap between births and deaths.

Births

Gap gets smaller

Therefore, population INCREASES

NumberofOrganisms

Deaths

Time

population size in ecosystem3
Population Size in Ecosystem
  • Graph of Births and Deaths. Look at the gap between births and deaths.

Births

Gap stays the same

Therefore, population INCREASES

NumberofOrganisms

Deaths

Time

energy flow in an ecosystem
Energy Flow in an Ecosystem
  • Autotrophs: produce their own food. 2 types:
  • Autotrophs make ENERGY available for all other organisms in the ecosystem.

“self”

“Light”

“Chemical”

energy flow in an ecosystem1
Energy Flow in an Ecosystem
  • Heterotrophs: get energy by consuming other organisms.
  • Note: Decomposers: secrete enzymes to break down dead matter & then absorb the nutrients (bacteria and fungi)

Herbivore

Carnivore

Omnivore

Detritivore

  • Organisms that consume dead matter (any).
  • Tend to be bugs.
  • Organisms that consume only plants
  • Organisms that consume only other heterotrophs
  • Organisms that consume both autotrophs and heterotrophs

AKA “Consumers”

energy flow in an ecosystem2
Energy Flow in an Ecosystem
  • Decomposers & Detritivores are similar, BUT

*Note: Scavengers technically eat dead organisms, but will also eat live organisms

Dead Matter

energy flow food webs
Energy Flow: Food Webs
  • Food Chain: simple model; one-way energy flow
    • Primary Producer  Primary Consumer  Secondary Consumer  Tertiary Consumer
  • *Note:
  • All primary producers are autotrophs
  • All primary consumers are herbivores (a type of heterotroph)
  • Higher consumers can be omnivores OR carnivores

Arrow shows direction of ENERGY

energy flow food web
Energy Flow: Food Web
  • Food Web: Interconnected food chains; complex
energy flow ecological pyramids
Energy Flow: Ecological Pyramids
  • Ecological pyramids: show relative amounts of energy, biomass, or # of organisms.

Trophic Levels

Template

energy flow ecological pyramids1
Energy Flow: Ecological Pyramids
  • Pyramid of Energy

Energy Lost as Heat (90%)

Available

Energy

Decreases

energy flow ecological pyramids2
Energy Flow: Ecological Pyramids
  • Pyramid of Biomass (total mass of life @ each level)

Note: Mass/Area

Available

Biomass

Decreases

energy flow ecological pyramids3
Energy Flow: Ecological Pyramids
  • Pyramid of Numbers (# of Organisms)

Population

Size

Decreases

4 minute break
4 Minute Break
  • Stay on this floor, otherwise privilege will be revoked
  • Be back in the class by ______.
reading work time
Reading / Work Time
  • Read Chapter 2
  • Do the Chapter 2 Assessment Questions #1-15, 17-24
  • Come show me your responses when you are finished.
    • If you don’t finish, it is homework!
reminder
Reminder
  • dp.davincischools.org/staff/blarkin