1st Period - Seating Chart

Table 1:EngelLutherAlexisTia

Table 2:TiyanaMarquisAhmarioShanice

Table 3:MatthewLanerraDamonyaeLorenzo

Table 4:LatonyaTneyahTyshawnIkeem

Table 5:MiyaArmeshaMichaelGregory

Table 6:BobbiDeonteJasminJohn

Table 7:EricLarryKaliaahDestiny

Unit 1: EcologyLesson: Interactions Among Organisms

Today’s Agenda 10/15/13: Brief lecture – interactions among

organisms, energy flow in ecosystems Web of Life Activity Exit Slip

Based on what you see, in your notes write definitions for “biotic” and “abiotic.”

Biotic: all living things in an ecosystemEx: plants, animals,

microorganismsAbiotic: non-living things in

an ecosystemEx: temperature, sunlight,

humidity, water, soil, mineral nutrients (nitrogen, phosphorus, sulfur)

Niche versus HabitatNiche: 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 HerbivoryPlease 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 Example:

A hummingbird eatsnectar from a flower

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

In both examples, who isbenefitting? How would you define mutualism and commensalism?

Producers and ConsumersPrimary 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 nutrientsConsumers rely on eating other

organisms to obtain energy and nutrients Also called heterotrophs Ex: herbivores, omnivores, carnivores,

decomposers, scavengers

The Web of LifeFor 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 BiomassAs 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)

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.

Practice

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

fargreater numbers, with greater biomass, than organisms at higher trophic levels.

Building an Energy Pyramid

Today’s Agenda – 10/16/13Review ACT Practice Questions – 15 min

Review homework – 10/15 minContinue on with Energy Flow through Ecosystems – guided notes

ACT ReviewWe 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 ReviewAt end of 5 mins, we will begin

presenting answers/explanations to the class 1st team member reads the question2nd team member gives

answer/explanationNOTE: If we can complete this review

within 15 minutes, each team will receive 10 participation points today