take out your homework take a picture of your ecosystem and record data in spreadsheet
TRANSCRIPT
![Page 1: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/1.jpg)
• Take out your homework
• Take a picture of your Ecosystem and record data in spreadsheet
![Page 2: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/2.jpg)
COUNTING POPULATIONS
How many are there?
![Page 3: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/3.jpg)
5 Mins! Read the Population Article shared on Google Drive1. On a piece of paper, free-write your
reaction to the piece.2. What type of writing is this?3. What is the point of the article?
![Page 4: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/4.jpg)
![Page 5: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/5.jpg)
Whats an Organism? Any living thing
![Page 6: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/6.jpg)
What is an Ecosystem
?Collection of all the organisms in an area AND the non-living parts of the environment
![Page 7: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/7.jpg)
What is a population? What are the 3 biggest in this prairie community?
![Page 8: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/8.jpg)
How big is each population?
How can we figure out how many individuals are in each population?
What is a census?It is a count of a population
![Page 9: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/9.jpg)
What are the Types of Census?
True census – actual count Sample census (2 types)– estimated
count of population A plot sample census is made by
marking off small areas or plots and counting in the areas
A mark return recapture census is capturing animals, marking them, and releasing them back, then recapturing them to count how many are marked.
![Page 10: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/10.jpg)
TRUE CENSUS
Each member of a population is physically counted one by one…
Name of Population
Grass Shrubs Buffalo
Actual Count
Hell no-TMTC 498 158
Sample Census
? ? ?
![Page 11: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/11.jpg)
PLOT SAMPLE CENSUS
Name of Population
Grass Shrubs Buffalo
Actual Count
TMTC 498 158
Sample Count
1500 x 10000 = a lot
10 x 60 = 600 4 x 40 = 160
![Page 12: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/12.jpg)
What about ACCURACY???
•Why was the last census not very accurate?
•What could we do to make it more accurate?
•Where have you already done a sample census this year?
![Page 13: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/13.jpg)
![Page 14: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/14.jpg)
Transect- Draw a line through an ecosystem and count along it.
![Page 15: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/15.jpg)
Why would we use a Transect?
• To make sure we hit all unique parts of an ecosystem.
• Only useful in certain circumstances.• Why is the below example good for a transect?
![Page 16: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/16.jpg)
What is Population density?
Number of individuals that live in a unit area…also found by using plots in a sample census.
![Page 17: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/17.jpg)
Example Population density
Examples: There are 270 people per square
mile in Pennsylvania There are 25 deer per square mile in
PA
![Page 18: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/18.jpg)
DISCUSSION QUESTIONS
Why is a sample a good way to count a population?
What are some disadvantages to using a sample?
What could you do to sample a population of animals that do not stay in one place?
![Page 19: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/19.jpg)
MARK AND RECAPTURE A way to count
organisms that move or are hard to see.
Catch, mark, let go, catch again.
Use a formula to estimate the number.
![Page 20: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/20.jpg)
Day 2: Get out your binders and a pencil…
What is an organism? What is a census? What is a sample census? What is a true census? When would you NOT use a sample
census but do a true census? How can you make a sample census more
accurate?
![Page 21: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/21.jpg)
Review question
Is Mark and Recapture a true census or a sample census?
What scenarios are good for mark return recapture?
When do you want to do a true census?
When do you use a sampling census? What are some disadvantages to
using a sample?
![Page 22: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/22.jpg)
Practice
For the following animals, what method would be most appropriate for getting a census?
![Page 24: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/24.jpg)
![Page 26: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/26.jpg)
![Page 27: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/27.jpg)
![Page 28: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/28.jpg)
Rabbits
![Page 29: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/29.jpg)
Robins
![Page 30: Take out your homework Take a picture of your Ecosystem and record data in spreadsheet](https://reader035.vdocuments.net/reader035/viewer/2022081520/5697bfb91a28abf838c9fdef/html5/thumbnails/30.jpg)
Bees!