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

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 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

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

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.

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