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1st Period - Seating Chart. Table 3 : Matthew Lanerra Damonyae Lorenzo. Table 1 : Engel Luther Alexis Tia. Table 2 : Tiyana Marquis Ahmario Shanice. Table 4 : Latonya Tneyah Tyshawn Ikeem. Table 7 : Eric Larry Kaliaah Destiny. Table 6 : Bobbi Deonte Jasmin John.

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slide1

1st Period - Seating Chart

Table 3:

Matthew

Lanerra

Damonyae

Lorenzo

Table 1:

Engel

Luther

Alexis

Tia

Table 2:

Tiyana

Marquis

Ahmario

Shanice

Table 4:

Latonya

Tneyah

Tyshawn

Ikeem

Table 7:

Eric

Larry

Kaliaah

Destiny

Table 6:

Bobbi

Deonte

Jasmin

John

Table 5:

Miya

Armesha

Michael

Gregory

unit 1 ecology

Unit 1: Ecology

Lesson:

Interactions Among Organisms

today s agenda 10 15 13
Today’s Agenda 10/15/13:
  • Brief lecture – interactions among organisms, energy flow in ecosystems
  • Web of Life Activity
  • Exit Slip
slide5

Biotic: all living things in an ecosystem

    • Ex: plants, animals, microorganisms
  • Abiotic: non-living things in an ecosystem
    • Ex: temperature, sunlight, humidity, water, soil, mineral nutrients (nitrogen, phosphorus, sulfur)
niche versus habitat
Niche versus Habitat
  • Niche: the role an organism plays in its community; everything an organism does and when and where it does it.
  • Habitat: where an organism lives; provides an organism with all resources they need to survive.
predation parasitism and herbivory
Predation, Parasitism, and Herbivory
  • Please ask if you need clarification for the above terms.
  • These are three types of interactions in which one species benefits, while the other is harmed.
  • Examples?
mutualism commensalism
Mutualism & Commensalism
  • Mutualism Example:
    • A hummingbird eats

nectar from a flower

  • Commensalism Example:
    • A bird builds a nest in a tree.

In both examples, who is

benefitting? How would you

define mutualism and commensalism?

producers and consumers
Producers and Consumers
  • Primary producers capture energy from the sun or chemicals and store it in the bonds of sugars
    • Also called autotrophs
    • Ex: plants and bacteria use photosynthesis and chemosynthesis to obtain energy and nutrients
  • Consumers rely on eating other organisms to obtain energy and nutrients
    • Also called heterotrophs
    • Ex: herbivores, omnivores, carnivores, decomposers, scavengers
the web of life
The Web of Life
  • For this activity, as you read the Introduction, answer the last questions on your guided notes.
  • Complete the food web in class, and answer the analysis questions at home if you cannot finish in class.
  • We will review your answers tomorrow.
energy and biomass
Energy and Biomass
  • As organisms feed on each other, matter and energy move through the community’s trophic levels.
  • Not all energy is transferred 100% efficiently at each trophic level
    • Ex: burning gas while driving – only 14% actually moves the car down the road; the rest is spent as heat
    • Same with organisms – energy is burned as heat; only 10% is transferred as usable energy (the rest is “lost” as heat)
slide13

This energy pyramid illustrates the 10% rule: only about 10% of the energy contained in any given trophic level is transferred to the next highest level. The rest is used to power life processes or “lost” as heat.

energy and biomass1
Energy and Biomass
  • Biomass is the total amount of living tissue in each trophic level of an ecosystem

Organisms at lower

trophic levels exist in far

greater numbers, with

greater biomass, than

organisms at higher

trophic levels.

today s agenda 10 16 13
Today’s Agenda – 10/16/13
  • Review ACT Practice Questions – 15 min
  • Review homework – 10/15 min
  • Continue on with Energy Flow through Ecosystems – guided notes
act review
ACT Review
  • We will spend 10 – 15 min every Wednesday to practice for ACT
  • You will be working in pairs – with the person sitting next to or across from you at your table
  • Use whiteboards to answer and explain your question
  • If you get stuck, ask me – I will help you out
act review1
ACT Review
  • At end of 5 mins, we will begin presenting answers/explanations to the class
    • 1st team member reads the question
    • 2nd team member gives answer/explanation
  • NOTE: If we can complete this review within 15 minutes, each team will receive 10 participation points today