1. Ciliates Amoeboid Protozoans Flagellated Protozoans
The Protozoans
Ciliates
Amoeboid Protozoans
Flagellated Protozoans
Kingdom Protozoa

2. Protists Defining Characteristics All are unicellular eukaryotes
What is a prokaryote?
Many species are both heterotrophic and autotrophic simultaneously or at different stages of the lifecycle
Kingdom Protozoa

3. Eukaryote Cell

4. Prokaryote Cell

5. Adaptability
Protozoans are ecologically important primary producers, consumers and as vital links in the food chain
Humans are greatly effected by parasitic protozoans either directly or indirectly
Effects range from irritating - fatal
Malaria (Plasmodium spp.) worldwide epidemic
Kingdom Protozoa

6. Reproduction Asexual reproduction
Replication of chromosomes and the splitting of the parent into two or more parts
Binary fission
Multiple fission
Budding
Protozoans are problematic in their associations as colonial forms
Through asexual reproduction protozoans are identical and could be considered multicellular
Kingdom Protozoa

7. Asexual Reproduction
Amoeba
Flagellate
Ciliate
Kingdom Protozoa

8. Classification Alveolate Protozoans Phylum Ciliophora Phylum Dinozoa
Phylum Apicomplexa
Amoeboid Protozoans
The Rhizaria
Phylum Foraminifera
Phylum Radiozoa
Kingdom Protozoa

9. Phylum Ciliophora Defining characteristics
Body externally ciliated in at least some lifecycle stages
Have the highest degree of subcellular specialization and are considered advanced protozoans
Paramecium feces
Kingdom Protozoa

10. Cilia Cilia Fastest of all the protozoans
Hair-like structures by which the organism moves, collects food and senses their surroundings
Fastest of all the protozoans
Kingdom Protozoa

12. Ciliate Biology Oral groove Cytostome Cytoproct Contractile vacuole
Paramecium

13. Ciliate Biology Contains two types of nuclei
Micronuclei – has very little to do with the functions of the organism. Essential in sexual reproduction
Macronuclei – contain many copies of the genome and is responsible for day to day activities
Reproduce using asexual binary fission and sexual reproduction (conjugation)
Conjugation
Kingdom Protozoa

14. Ciliate Lifestyles
65% of all ciliate species are free-living and mobile
Some ciliates form colonial aggregations and have sessile habits
Other ciliates have symbiotic relationships in invertebrates and vertebrates
Vorticella
Kingdom Protozoa

15. Dinoflagellates (Phylum Dinozoa)
Know for bioluminescence and highly toxic red tides
Dense aggregations produce saxitoxin killing fish and crustaceans
Also contaminates shellfish causing diarrheic shellfish poisoning
Some benthic dinoflagellates produce a neurotoxin that accumulates in tropical fish called Ciguatera
Kingdom Protozoa

16. Phylum Apicomplexa (Sporozoa)
All members of this phylum are endoparasites
Includes Malaria (Plasmodium)
Toxoplasma gondii
Perkinsus spp.
Pneumocystis carinii
Kingdom Protozoa

17. Malaria (Plasmodium)

18. Amoeboid Protozoans Characterized by pseudopodia
Contains 56,000 described species 44,000 are only known as fossils
Most reproduce asexually through binary fission
Characterized by pseudopodia
Food is usually captured by phagocytosis
Body types range from free flowing to rigid with skeletal supports
Kingdom Protozoa

19. Phagocytosis
Kingdom Protozoa

20. Amebas and You!
Kingdom Protozoa

21. Class Foraminifera (Rhizaria)
Defining characteristics
Individuals secrete multi-chambered tests, generally made of calcium carbonate (CaCo3)
Foram. tests
Kingdom Protozoa

22. Foraminiferans Extremely abundant, most are benthic and marine
Feed on diatoms and algae, very slow movers
Organisms are extremely common and form ooze
White cliffs of Dover are foraminiferan tests
Kingdom Protozoa

23. Kingdom Protozoa

24. Phylum Radiozoa (Rhizaria)
Defining characteristics
Body is divided into distinct zones separated by a perforated membrane or capsule
Have pseudopodia supported with thin microtubules that give a spiny rayed appearance
Kingdom Protozoa

25. Radiolarians
Have shells made of silicon dioxide that can be very intricate
Feed on diatoms and other phytoplankton
Most species are planktonic
Benthic individuals move by use of pseudopodia
Can occur in large concentrations that form ooze as well
Kingdom Protozoa

26. Zooflagellated Protozoans
Choanoflagellates
Kingdom Protozoa

27. Phytoflagellated Protozoans
Have chlorophyll and obtain energy directly from the sunlight
Some are strictly autotrophic or heterotrophic
Some are a combination of both
Both the Euglena and the dinoflagellates are examples of phytoflagellated protozoans
Kingdom Protozoa