Phytoplankton and Zooplankton lab

  1. Record the name of the specimen/culture/slide you are observing.

Specimen #1

Specimen: Volvox W.M. (Globe Algae) ZooPlankton
Magnification: 10 x 0.25


Circular in appearance with a light purple pink cell containing darker purple dots.

Specimen #2

Specimen: Spirogyra (Phytoplankton)
Magnification : 4 x 0.10

Observations: Filamentous freshwater green algae containing spiral bands that appear to be chloroplasts.

Specimen #3

Specimen: Ulothrix (Phytoplankton)
Magnification: 10 x 0.25

Observations: Algae typically found in fresh and marine water. Cells are broad and long at about the same rate. Live in cold temperatures.

Specimen #4

Specimen: Stentor ( ZooPlankton) Live Culture
Magnification: 10 x .025

Observations: Quite a lively video footage of the zooplankton in action. Is seen making a move toward his food in the dish using flagella like back to project itself forward. Its body contorts to slim and elongated, to short and fat body.

Specimen #5

Specimen: Vaucheria Geminata (Phytoplankton)
Magnification 4 x 0.10

Observations: Multinucleate tubular branches that lack cross walls. Reproduce asexually and sexually.

2. Define Plankton in General what is it?

A Plankton is one of the smallest microorganisms found in the ocean drifting and riding out the currents of the sea. Consisting of diatoms, protozoans, small crustaceans, and the eggs and larval stages of larger animals. Many species in the ocean and freshwater environments rely on these organisms as their diet especially filter feeders.

3. What important role does Phytoplankton play in marine or other aquatic ecosystems?

Phytoplankton are plants in the ocean or freshwater that accounts for up to half of global primary production from photosynthesizing. They provide the primary food source for the zooplankton which forms the first level of the oceans or other aquatic food chains.

4. What important role does zooplankton play in marine or aquatic ecosystems?

Zooplankton plays a major role in the export of carbon in the ocean. They are animals that consist of small immature species and tend to be bad swimmers that float in the currents.

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