Bacteria to Plants Chapter 3 Protists to Fungi Section 2 Algal Blooms Key Concepts: 1.What are the...

Bacteria to PlantsChapter 3 Protists to Fungi

Section 2 Algal Blooms

Key Concepts:

1. What are the causes and effects of saltwater and freshwater algal blooms?

Key Terms:• Algal Bloom • Red Tide

• Eutrophication

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.

Algal Blooms Saltwater Tides

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

Algal Blooms Freshwater Blooms

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

Algal Blooms Effects of Freshwater Algal Blooms

1. Layer of algae forms on top of the water that prevents sunlight from reaching plants and algae below the surface

2. Those plants and algae die and float to the bottom 3. Decomposers (Bacteria) increase in number to break

down the dead plants and algae 4. Bacteria use up all of the oxygen in the water 5. Without oxygen the fish in the water die.

Chapter 3 Protists to Fungi Section 2 Algal Blooms

1. What are the causes and effects of saltwater and freshwater algal blooms?

Section Review on p. 86