
#3 - Freshwater Ecosystem - Rio Negro
Presentation
•
Science
•
6th - 7th Grade
•
Easy
Standards-aligned
Amalia Herashchanka
Used 13+ times
FREE Resource
6 Slides • 7 Questions
1
Rio Negro
Freshwater Ecosystem
2
Multiple Choice
The pink river dolphin is a predator. What structural adaptation of the pink river dolphin shows what niche it has in the ecosystem?
Teeth for grabbing prey
Light skin that the prey can see
3

Edpuzzle
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4
Where is the Rio Negro?
The Rio Negro is a freshwater river found in South America.
Rio Negro means Black River. The dark color comes from humic acid, which is created when some plants that grow in sandy clearings don't break down fully.
Remember, freshwater ecosystems DO NOT have salt.
5
Multiple Choice
What is NOT found in freshwater ecosystems in high levels like it is found in marine ecosystems?
Oxygen
pH
Salt
6
Multiple Choice
Which of the following are the abiotic factors of a freshwater ecosystem?
flow of water, light, amount of light, temperature, and chemistry of the water
salt, dissolved oxygen, temperature, and amount of light
plants, animals, microbes
7
On your trip, you observe a couple of different organisms in the Rio Negro community.
8
Multiple Choice
Organism #1: The Neon Cardinal Tetra
You may have seen these in pet stores or aquariums!
These fish swim in groups called "schools." What type of interaction is this?
Competition
Cooperation
Symbiosis
9
Organism #2: Pink River Dolphin
What BEHAVIORAL and STRUCTURAL adaptations do pink river dolphins have? On the next slide, watch the video to learn how pink rivers dolphins are adapted to their environment.
10

Edpuzzle
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11
Open Ended
What kind of behaviors does the pink river dolphin help it to obtain resources, such as food?
Use evidence from the video.
Use scientific reasoning to explain why this behavior is used in this environment.
Use full sentences.
12
Open Ended
What kind of physical structures (body parts) are adaptations that help the river dolphin to obtain resources, such as food?
Use evidence from the video.
Explain how these structural adaptations help the river dolphin get its food.
Use full sentences.
13
Multiple Choice
What is the niche (job) of the pink river dolphin?
pollinator
predator
prey
decomposer
Rio Negro
Freshwater Ecosystem
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