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Phytoplankton are the plant-like organisms of the sea that carry out photosynthesis and float in the upper areas of the worlds oceans.
Most of the ocean is too deep for plants to attach to the bottom like this Giant Kelp off the coast of California.
Therefore, most of the photosynthesis is carried out by microscopic single celled organisms or chains of single cells.
These organisms often have long projections to increase their surface area or oils to keep them in the photic zone.
Diatoms are dominant members of the phytoplankton that can be caught in a net.
They are especially common in temperate, coastal and polar regions.
They have sculptured shells, or frustules, made of silica. Diatoms can come in a variety of shapes.
More Diatom Shapes
Life Cycle of a Diatom
Fish Killer Some diatoms, like this one can kill fish when found in large numbers
The glasslike projections cause mucus to build up in the fishs gill which can lead to the fish's death.
Dinoflagellates are found throughout the worlds oceans, but tend to prefer warmer areas. Given nutrients, dinoflagellates can bloom or explosively grow to huge numbers sometimes causing RED TIDES
Florida red tide organism: Gymnodinium breve Dinoflagellates: red tides
Around 60 species of Dinoflagellates are known to cause red tides. A few species produce poisons that are among the most powerful natural toxins known.
During a red tide, dinoflagellates may poison the waters, turning the surface into a sea of dead fish. Red tides can also threaten human health.
Mussels, clams and other bivalves store the toxins as they filter feed. People who eat the shellfish can get Paralytic Shellfish Poisoning.
Victims suffer numbness and tingling, loss of balance, slurred speech, and in extreme cases, paralysis and death!
Symbiotic Dinoflagellates Some dinoflagellates like Zooxanthellae, are symbiotic with corals or jellyfish.
Coccolithophorids are common members of the nanoplankton. Most are too small to be taken in a regular plankton net.
Though found in coastal waters, they do best in open oceans where they often far outnumber all other types of phytoplankton.
These single celled organisms are covered by plates made of calcium carbonate.
Because of there small size, very little is known about silicoflagellates except that they can be very important to the primary production in the worlds oceans.
Freshwater Ecosystems Objectives Describe the factors that determine where an organism lives in an aquatic ecosystem. Describe the littoral zone and.
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Seaweeds or Macroalgae are the large primary producers of the sea. Though more complex than the unicellular algae, seaweeds still lack the complex structures.
How Ecosystems Work Chapter 3 You could cover the whole world with asphalt, but sooner or later green grass would break through. Ilya Ehrenburg, Russian.
Of. and a to the in is you that it at be.
Ch 19: Diversity of Protists. Kingdom Protista G Eukaryotes that are not animals, plants or fungi. They share some but not all of the features of plants,
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Mussels Mussels, like clams and oysters, have two shells and are therefore bivalves.
The. of and a to in is you that it he was.
All of the major phyla of animals are represented in the plankton. Remember: In the sea, microscopic plantlike organisms form the base of the food chain.
Sedimentary Rocks Rocks made of bits & pieces of other rocks.
Protists Protists are single celled eukaryotes. A few forms are multi-cellular. Protists often have a very complicated internal structure: a single cell.
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Dinoflagellates. Introduction Dinoflagellates are unicellular, flagellated protists –The first modern dinoflagellate was described by Baker in 1753 –The.
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Unit 2 – Ecological Organization Important introductory terminology (Levels of Organization): organism organism - An individual living thing, ex: frog,
Copyright © by Holt, Rinehart and Winston. All rights reserved. ResourcesChapter menu To View the presentation as a slideshow with effects select View.
The. of and a to in is you that it he for.
Why Are Plants Important? On the first day of our plant study, we mentioned things like crops, medicine, oxygen, food chains, shelter, and others. What.
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