Teach TCI Ecosystems

Unit 3 Lesson 3 Changes in Ecosystems

by Katya Lloyd

Multiple Choice

Do Now 11.16. 21

Whih successin takes place on a barren land destroyed by a natural disaster?

• Secondary Succession

• Primary Succession

​Do Now

​Your "Do Now" is inside of the assignments tab in teams. You have two minutes to get it done.

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​Once you are done, please prepare your papers to take notes.

​Standard 1

​6.LS2.6 Research the ways in which an ecosystem has changed over time in response to changes in physical conditions, population balances, human interactions, and natural catastrophes.

​Performance Based Objective

SWBAT obtain, evaluate, and communicate information about how an ecosystem has changed over time IOT explain responses to changes in physical conditions, population balances, human interactions, and natural catastrophes.

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​Obtain- to get, gain

​Evaluate- to decide the value or worth after study: assess

Communicate- share ir exchange information, news, or ideas

Ecosystem- a community of organisms and their nonliving environment.

Explain- make clear to somebody by describing in more detail

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​Rewrite this PBO in your own words (4 minutes)

​Learning Objectives

• Explain eutrophication as an example of ecosystem change.

• Describe succession in ecosystems and differentiate between primary and secondary succession.

• Explain how mature ecological communities support biodiversity.

• Describe how biodiversity contributes to the sustainability of an ecosystem.

​Vocabulary

​Eutrophication

​Succession

​Pioneer Species

​Biodiversity

Let's Engage

• ​STOP what you're doing

• ​Put your pencil down

• ​Let's watch the video on how hymans change/have changed the environment around us!!!!

• ​https://youtu.be/CyE4_D6Fb_w

​How Quickly Do Ecosystems Change?

• ​Ecosystelms and organisms are constantly changing and responding to daily, seasonal, and long-term changes in the environment.

• ​Some changes are sudden and irregular (instantly and unexpected)

• ​Most changes are gradual (slowly happen over time)

Multiple Choice

​Ecosystelms and organisms are constantly changing

• False

• True

Open Ended

How would you conrrast the meaning of sudden physical changes and gradual physical changes to an ecosystem?

​​Slow changes to an Ecosystem

​​Over time, a pond can change into a meadow.

• ​Eutrophication causes this change.

• ​Eutrophication is the process in which organic matter and nutrients slowly build up in a body of water.

• ​The nutrients increase the growth of plants and microorganisms

• ​When the organisms die they sink to the bottom of the pond.

• ​The organic matter eventyally fills the pond and becomes soil that grasses and other meadow plants can grow in.

• ​Ecosystem changes can also be caused by seasonal and long-term changes in climate (weather).

Open Ended

Describe what happens during the process of eitrophication

Open Ended

Hypothesize page 172 #6

***Work with your research partner (your neighbor)***

What natural ecological change mght happen to the meadow that forms where the pond was?

​Coach Lloyd's Answer

• ​The meadow may become a forest

​Sudden Changes in Ecosystems

• ​Ecosystems can suddenly change due to catastrophic (causing sudden great damage or suffering) natural disturbances

• ​A hurricane's strong winds can blow down trees and destroy vegetation in a few hours.

• ​Lightning can cause a forest fire that rapidly clears away plants and alters (changes) animals habitats.

• ​A volcano can erupt and cause massive destruction to an ecosystem

• ​DESTRUCTION IS NOT THE END OF THE STORY! Recovery brings new changes in an ecosystem and the populations that live in it.

Open Ended

**EXIT TICKET QUESTION 1**

Name one type of catastrophic natural disturbance

Open Ended

exit ticket question 2

How would you describe the process of eutrophicaion?

Ecological Succession

• Succession- the slow development or replacement of an ecological community by another ecological community over time.

• ​There are two types of ecological successions.

• ​Primary Succession

• ​Secondary Succession

​Primary Succession

Work in groups to complete number 10 on page 174, in yur notebook.

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​We will duscuss our answers after the five minute timer goes off.