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Ecology

What are the two parts that are required in ecology? Let me draw a scene Things that are living Things that are not living

In your notes, quickly jot down 3 things that are living and 3 things that are not living that are required in an environment

Ecology

When we study ecology, do we study the whole earth at one time Not necessarily

Usually, we don’t study ecology as a whole. We usually break it into smaller pieces.

These smaller pieces are called ecosystems

Ecosystems

Now back to the ecology question. What are the two parts needed?

1. Living and non-living The same is true for ecosystem Ecosystems consist of a given area’s

physical features (abiotic factors) and organisms (biotic factors)

Organisms that live together in an ecosystem are called a community

Biotic Factors

ECOSYSTEMWith a community

Abiotic Factors

In this scene… What is abiotic? What is biotic? How do they relate

to each other?

Question

When we look at Lawndale, was there a school here a year ago?

5 years ago? 10 years ago? 1000 years ago? What has happened to the environment over

time? change

Change

The same can be said for ecosystems. Over time an ecosystem can change. Anyone heard of Death Valley? Long ago it used to be covered by water Now, it is a desert How do they know this? These types of changes require a long period

of _____

Change and time in an ecosystem

Ecosystems changing in response to natural and human disturbances Ecological succession Old inhabitants gradually die or move; new

organism move in Examples or causes of ecological

succession? Dinosaurs and meteors Grand canyon People and global warming

What is a niche?

Bay-Breasted WarblerFeeds in the middlepart of the tree

Yellow-Rumped WarblerFeeds in the lower part of the tree andat the bases of the middle branches

Cape May WarblerFeeds at the tips of branchesnear the top of the tree

Spruce tree

A niche is the physical and biological conditions in which an organism lives and the way the organism uses those conditions

Community interactions

How communities in ecosystems interact with each other?

Community interactions (definition) Competition (organism use the same resource) Predation (one feeds off another) Symbiosis (two live closely; need the other)

Mutualism (both benefit) Commensalism (only one benefits) Parasitism (one benefits, other is harmed)

Homework

SA 4-2 #1-6

Classwork

Create a handout/guide for Section 4-2 Drawing #1, include the following

5 LABELED abiotic factors 5 LABELED biotic factors

Drawing #2, include a cartoon showing Mutualism Commensalism Parasitism

Drawing #3, ecological succession Draw the ecosystem of Lawndale 200 years ago