Section 4
Ecology of Protists
Book
Version 32
By Boundless
By Boundless
Boundless Biology
Biology
by Boundless
3 concepts
![Thumbnail](../../../../../../figures.boundless-cdn.com/19156/square/figure-23-04-01.jpeg)
Protists as Primary Producers, Food Sources, and Symbionts
Protists function as sources of food for organisms on land and sea.
![Thumbnail](../../../../../../figures.boundless-cdn.com/19158/square/figure-23-04-03.jpeg)
Protists as Human Pathogens
Many protists exist as parasites that infect and cause diseases in their hosts.
![Thumbnail](../../../../../../figures.boundless-cdn.com/30631/square/figure-23-04-05.jpeg)
Protists as Plant Pathogens
Many protists act as parasites that prey on plants or as decomposers that feed on dead organisms.