Protists: The Good, the Bad and the Ugly - PowerPoint Presentation

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Uploaded On 2022-08-04

Protists: The Good, the Bad and the Ugly - PPT Presentation

Good protists Oxygen Phytoplankton carry out ½ of Earths photosynthesis Producers start of marine food chains Zooplankton are an important food source for animals Decomposers end of food chains ID: 935807

food protists water organisms protists food organisms water oxygen algae algal blooms symbiotic mold pearson protist hall poisonous prentice

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Slide1

Protists: The Good, the Bad and the Ugly

Slide2

Good protists

Oxygen!

Phytoplankton carry out ½ of Earth’s photosynthesis.Producers, start of marine food chainsZooplankton are an important food source for animals.Decomposers, end of food chains

Slide3

Food for humans – sushi, ice cream

Symbiotic relationships with other organisms

. A protist live inside termites to help them digest wood.Lichens are symbiotic associations between a fungus and a photosynthetic organism, usually green algae. Bioluminescence! (glow in the dark)

Slide4

Symbiotic Relationships

Structure of a Lichen

Slide5

Bad protists

Pathogens – animal-like protists cause malaria, African sleeping sickness, amebic dysentery and Giardia

ParasitesCan cause plant diseases. Water mold was a cause of the Irish potato famine in the 1800s.

Slide6

Slide7

Algal Blooms

Many protists are vital in recycling sewage and other wastes. When waste is excessive, algae may grow into enormous masses known as blooms, which deplete water of nutrients. Their decomposition robs water of oxygen, killing fish and invertebrate life.

Slide8

Red tide caused by algal bloom of dinoflagellates, a kind of

protist. Hazardous to swimmers, animals and other marine life.

Poisonous algal blooms rob organisms of sunlight and oxygen, and may emit poisonous toxins.

Slide9

Ugly protists

Dog vomit slime mold – Ewww

!Sailor’s eye algae – one of the largest unicellular organisms.