1 / 18

Pelagic (Water Column) Communities Part 1

Pelagic (Water Column) Communities Part 1. Pelagic Environment Pelagic Organisms neritic plankton oceanic nekton neuston. Plankton – by type and size phyto, zoo, bacterio. neritic zone: low tide mark to the edge of the continental shelf, about 200 meters

donny
Download Presentation

Pelagic (Water Column) Communities Part 1

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Pelagic (Water Column) Communities Part 1

  2. Pelagic Environment Pelagic Organisms neritic plankton oceanic nekton neuston Plankton – by type and size phyto, zoo, bacterio

  3. neritic zone: low tide mark to the edge of the continental shelf, about 200 meters • oceanic zone: beyond OCS and >200m http://www.seafriends.org.nz/enviro/habitat/eco04.gif

  4. Plankton - Passively floating, drift by water currents or weakly swimming minute or micro. organisms, primarily algae, bacteria, eggs, larvae, protozoa and invert. predators. • Nekton - Rel. large, actively swimming organisms, move independently of currents, strong locomotory powers • Neuston - minute or microscopic, float on or immediately under water surface • Pleuston - organisms occupying the air-water interface (part above water)

  5. Plankton size classes

  6. Time spent in plankton • Holoplankton – entire life cycle in plankton • Meroplankton – part of life cycle in plankton, larvae (benthic, pelagic)

  7. Phytoplankton

  8. Diatoms – pill box or petri dish cell wall of SiO2. Predominate in temperate and arctic

  9. Dinoflagellates – have 2 flagella, cellulose plates. Predominate in tropics Toxic species – red tide organisms, Pfiesteria

  10. Diversity

  11. Zooxanthelle - symbionts http://www.chbr.noaa.gov/categories/raim/images/coral_01.jpg

  12. Red Tides http://serc.carleton.edu/images/microbelife/topics/red_tide_for_ed.jpg

  13. Coccolithophores Autotroph Nanoplankton, CaCO3 plates or “buttons”

  14. Foraminifera • amoeboid protists • fine strands of cytoplasm forms live net • shell of calcium carbonate (CaCO3) or agglutinated sediment particles, • one or multiple chambers

  15. Radiolaria • amoeboid protozoa • hetrotroph • SiO2mineral skeletons • radiolarian ooze. • Rapid speciation - important diagnostic fossil

  16. Other phytoplankton groups • Cyanobacteria • Green algae, chlorophytes

  17. Homework assignment • HAB – in general, what are they, what are some different types, what causes them (how and why do they form), where do they occur • Research recent cases of HAB, use an HAB example to answer (provide basic references) • Organism involved and bloom cycle , • how and why does this HAB form, • where it has occurred • specific ecosystem effects • economic effects

More Related