River ecosystem

High school (ages 12+)
Environment & Earth

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/river-ecosystem

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the allochthonous organic matter?Organic material originating from outside the aquatic ecosystem, often from riparian vegetation
2. What happens to a river as it moves from the mountains to the sea?It starts fast and steep, then slows and widens, dropping finer sediments and forming pools and riffles.
3. Why do fish live in different parts of a river?Some fish are built for the fast, turbulent water of the headwaters, while others prefer the calm, slow water in lower sections.

Habitat Heterogeneity: The variety of different physical environments or niches within a given ecosystem.
Riparian Zone: The interface between a river and the land, characterized by distinct vegetation and ecological processes.
Anthropogenic Impacts: Environmental changes caused or influenced by human activities and their effects.