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Unformatted text preview: HYDROTHERMAL VENTS HISTORY OF VENTS
First vents were found in 1977 along the Galapagos Spreading Center Since the vents discovery more than 400 species have been described Geological Oceanography Jaime Miller WHAT ARE HYDROTHERMAL VENTS?
submarine springs where nutrient rich fluids emanate from the sea floor vents occur along active mid-ocean ridges and back-arc spreading centers White smoker Black smoker HOW VENTS FORM
Sea-floor Spreading Form where crustal plates are slowly spreading apart Normally found along the crest of oceanic midocean ridges HOW VENTS WORK
1. Cold seawater sinks down through cracks in the crust 2. Components such as oxygen and potassium are removed from the seawater 3. Calcium, sulfate, and magnesium are removed from the remaining fluid HOW VENTS WORK
4. Sodium, calcium, and potassium from the surrounding crust enter the fluid 5. Fluids reach their maximum temperature and copper, zinc, iron, and hydrogen sulfide from the crust dissolve into the fluids HOW VENTS WORK
6. Hot fluids carrying the dissolved metals rise up through the crust 7. Hydrothermal fluids mix with the cold, oxygen rich seawater HYDROTHERMAL VENT SPECIES
Sea floor spreading rate and topographic features are the likely influence the biogeography Six biogeographic provinces are recognized HYDROTHERMAL VENT SPECIES OTHER POSSIBLE REASONS FOR SPECIES VARIANCES
Bathymetric differences Differences in sedimentation Delivery of photosynthetically derived organic material Frequent volcanic eruptions engulfing existing vent communities allowing new communities to form COMMON VENT SPECIES
BACTERIA TUBE WORMS COMMON VENT SPECIES
CRABS MUSSELS COMMON VENT SPECIES
SHRIMP FISH COMMON VENT SPECIES
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This note was uploaded on 02/10/2012 for the course MAS 603 taught by Professor Haywick during the Fall '11 term at S. Alabama.
- Fall '11