slide1
Download
Skip this Video
Download Presentation
Deep Sea

Loading in 2 Seconds...

play fullscreen
1 / 26

Deep Sea - PowerPoint PPT Presentation


  • 244 Views
  • Uploaded on

016b. Deep Sea. Deep Sea. Ocean Zones. photic. 100m. dysphotic. aphotic. Deep Ocean Characteristics. Cold Still Stable Dark Essentially no productivity Sparse Life Extremely high pressure Little food. Potential Food Source for Deep Sea Organisms.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Deep Sea' - truda


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.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

016b

Deep Sea

slide3

Ocean Zones

photic

100m

dysphotic

aphotic

slide4

Deep Ocean Characteristics

  • Cold
  • Still
  • Stable
  • Dark
  • Essentially no productivity
  • Sparse Life
  • Extremely high pressure
  • Little food
slide5

Potential Food Source for

Deep Sea Organisms

Deep sea orgs are dependant upon surface production from:

  • Dead phytoplankton, zooplankton, fish, mammals
  • Fecal pellets and crustacean molts
  • Macrophyte detritus
  • Animal migrations
slide7

Whale Fall; i.e., marine snow

Scavengers can feed on carcass in less than 6 months

slide10

Ocean Zones

photic

100m

dysphotic

aphotic

slide12

Hydrothermal Vents

  • Ballard & Grassle (1977)- Alvin to Galapagos
  • Sulfur-rich vents 660 oF, but quickly cool to 73 oF
  • Thermophilic bacteria associated with vent communities
slide13

Location of Vents

Hydrothermal vents found at mid-ocean ridge spreading centers.

slide15

15 mi S.E. of Kilauea

  • 3,178 ft below sea level
  • Will reach sea level in ~10,000 yrs

Loihi

slide18

Formation of Vents

  • Cold seawater sinks into cracks deep into ocean floor
  • Water heated by magma rises and leaches out minerals from surrounding rocks
  • The water emerges from vents and precipitates out minerals
slide22

Hydrothermal Vent Communities

Tube worms- pogonophorans

  • Other orgs:
  • Calyptogena- large white clam
  • Large crabs
  • Sea anemones
  • Shrimp
slide23

Hydrothermal Vent Communities

  • Support communities with high biomass, but low diversity
  • Primary producers are chemosynthetic bacteria
  • 90% endemism
  • Communities are small (25-60m in diameter)
slide24

Chemosynthetic Bacteria

Chemosynthesis:

Oxygen + hydrogen sulfide + water + carbon dioxide

sugar + sulfuric acid

602 + 6H2S + 6H20 + 6C02 C6H12O6 + 6H2S04

slide25

Photosynthesis

vs

Chemosynthesis

Photosynthesis:

6H2O + 6CO2 + nutrients + light energy C6H12O6 + 6O2

Chemosynthesis:

602 + 6H2S + 6H20 + 6C02 C6H12O6 + 6H2S04

slide26

Inquiry

  • Where are hydrothermal vents located?
  • How do they form?
  • Why doesn’t the vent water boil?
  • Describe the chemosynthetic bacteria\'s relationship with the vent and other animals living near the vent.
ad