1. Chapter 3 Protists to Fungi
Bacteria to Plants
Chapter 3 Protists to Fungi
Section 2 Algal Blooms
Key Concepts:
What are the causes and effects of saltwater and freshwater algal blooms?
Key Terms:
Algal Bloom
Red Tide
Eutrophication

2. Algal Blooms Algal Bloom- Rapid growth of a population of algae.
Happens in both Salt and Fresh water
Occur when nutrients increase in the water.

3. Algal Blooms Saltwater Tides Causes Effects
Red Tides- Saltwater algal blooms
Algae is usually red and turns the water red
Usually Dinoflagellates and diatoms
Some are brown, green, or colorless
Causes
Nutrients increase in the water
Occur regularly in certain seasons
When cold water raises in the ocean
Effects
High levels of concentration in animals that consume the algae
Dangerous toxins build up
Small organisms eat the algae and store the toxins
Bigger organisms eat them and become poisoned

4. Algal Blooms Freshwater Blooms Causes
Eutrophication- Process in which nutrients (like nitrogen and phosphorus) build up over time causing an increase in algae growth.
Causes
Spreading fertilizers on fields and lawns
Nutrients run off into water
Nitrogen and Phosphorus are two of the biggest components of fertilizers
Sewage treatment plants can leak waster water into the soil
Ground water travels to bodies of water

5. Algal Blooms Effects of Freshwater Algal Blooms
Layer of algae forms on top of the water that prevents sunlight from reaching plants and algae below the surface
Those plants and algae die and float to the bottom
Decomposers (Bacteria) increase in number to break down the dead plants and algae
Bacteria use up all of the oxygen in the water
Without oxygen the fish in the water die.

6. Chapter 3 Protists to Fungi
Section 2 Algal Blooms
What are the causes and effects of saltwater and freshwater algal blooms?
Section Review on p. 86