Chapter 6 marine microbes


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  • Left is how appear, right is how their probably appear through our microscopes
  • Chapter 6 marine microbes

    1. 1. Chapter 6 Marine Microbes (organisms invisible to the naked eye)
    2. 2. <ul><li>Include viruses, one-celled organisms, and fungi. </li></ul><ul><li>Microbes play many different roles in marine ecosystem. (structure leads to function) </li></ul><ul><li>Phytoplankton-planktonic algae </li></ul><ul><li>Zooplankton-larvae of small animals-ex fish, jellyfish </li></ul><ul><li>We will discuss 3 of these in detail that you will be accountable for </li></ul><ul><ul><li>Diatoms </li></ul></ul><ul><ul><li>Dinoflagellates </li></ul></ul><ul><ul><li>Forams </li></ul></ul>
    3. 3. Diatoms <ul><li>Most distinctive of plankton samples </li></ul><ul><li>Low latitudes-occur in coastal waters </li></ul><ul><li>Phytoplankton-Contributed to most of primary productivity of an area. </li></ul>
    4. 4. Diatom Structure <ul><li>Glassy Cell wall </li></ul><ul><li>2 valves- 1 large, 1 small </li></ul><ul><li>Visible geometrically shaped pattern-(helps distinguish between species) </li></ul><ul><li>Size: 2 micrometers to 4 millimeters </li></ul>
    5. 5. Reproduction <ul><li>Asexually by fission </li></ul><ul><li>When cells divides, each daughter gets one of the 2 valves </li></ul><ul><li>Eventually daughter that inherited smaller valve will reproduces sexually </li></ul>
    6. 7. Dinoflagellates- structure <ul><li>Globular, single-celled organisms </li></ul><ul><li>2 flagella that lie in groves on the center of surface </li></ul><ul><li>Larger of phytoplankton </li></ul><ul><li>Look similar to soccer ball under microscope </li></ul>
    7. 8. Reproduction <ul><li>Asexually by fission </li></ul><ul><ul><li>Split cell into two </li></ul></ul><ul><ul><li>Can happen at a rate of one division per day </li></ul></ul><ul><li>Sexual in some species by gametes </li></ul><ul><li>If you had two species of Dinoflagellates and species A produced asexually while species B produced sexually, which species to you expect to survive throughout time longer and why? </li></ul>
    8. 9. <ul><li>Zooxanthellae are collections of dinoflagellates </li></ul><ul><ul><li>They lack flagella like most species </li></ul></ul><ul><ul><li>Mutualistic relationships with corals, jellyfish, and mollusks. </li></ul></ul><ul><li>Some species are responsible for Red Tide </li></ul><ul><ul><li>algae bloom-large quick population boom </li></ul></ul><ul><ul><li>Produce toxins, usually cannot eat fish during this time </li></ul></ul><ul><ul><li> </li></ul></ul>
    9. 10. Goodby’s Creek in Mandarin during last Algae Bloom
    10. 12. Forams <ul><li>Have a pseudopod-organelle that is an extension of the cell surface </li></ul><ul><ul><li>Used for locomotion and food capture </li></ul></ul><ul><li>Have a shell </li></ul><ul><li>deep as Marianas Trench </li></ul><ul><li>members of zooplankton </li></ul>
    11. 13. Foram Reproduction <ul><li>Asexual fission most species </li></ul><ul><li>Sexual reproduction-some species </li></ul>
    12. 14. <ul><li> </li></ul>
    13. 15. Exit Slip <ul><li>Using you knowledge and distinguish between phytoplankton and zooplankton </li></ul><ul><li>Compare and contrast- Diatoms, Dinoflagellates, and Forams </li></ul>
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