Protists, Algae, & Fungi

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

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

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

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

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

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

Obtaining Food 1.The fungus grows hyphae into a food source 2.Digestive materials ooze from the hyphae into the food 3.The digestive chemicals break down the food into small substances that can be absorbed by hyphae

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