Protists , Algae, & Fungi

1. Protists, Algae, & Fungi

2. Plantlike Protists • Have you ever seen seaweed at the beach ? • Most commonly called algae • Algae: plant-like protists, are autotrophs • Come in variety of colors (green, yellow, red, brown, orange, or black) • Useful • Most oxygen in atmosphere made by algae

3. Algal Blooms • Algae common in both freshwater and saltwater • Float on surface of waters • Algal bloom: rapid growth of a population of algae

4. Saltwater Blooms • Algal blooms in saltwater are called red tides • Don’t always look red can be different colors • Red tides are dangerous when the toxins that the algae produce become concentrated in the bodies of organisms that consume the algae • Fish then feed on them

5. Freshwater Blooms • Have you ever seen a pond or a lake that looks like it is coated with a green layer? • Nutrients build up in the lake and increase algae growth • Layer prevents sunlight from reaching things below the surface • Plants die and bacteria feed on them. Use all the oxygen • No oxygen kills the fish

6. Fungi • Molds growing on bread and fruit • Mushrooms in the forest or yard are fungi • Fungi: are eukaryotes, use spores to reproduce, are heterotrophs, need moist warm places

7. Cell structure • Depend on how hyphae are arranged • Hyphae: branching thread like tubes that make up bodies of fungi

8. Obtaining Food • The fungus grows hyphae into a food source • Digestive materials ooze from the hyphae into the food • The digestive chemicals break down the food into small substances that can be absorbed by hyphae

9. Classification Of Fungi • Threadlike Fungi: spores in threadlike hyphae • Sac Fungi: produce spores in structures that look like sacks • Club Fungi: produce spores in structures that look like clubs • Imperfect Fungi: reproduce with budding