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The Deep Sea By Brady Romero
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Intro Undocumented What is it?
Physically Environmentally Biologically
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Physically Beneath continental shelf Originally thought as flat
Order of shelf? Originally thought as flat Trench benthic zone?
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Our problems We know nothing Bathysnap Expensive Hard Time consuming
Inaccurate Bathysnap Camera Bathysnack
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Environment Light Temperature Dissolved oxygen Order? Food?
Exceptions? Temperature Constant -1* to 4* Celsius Dissolved oxygen Minimum under _____ Then constant
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Environment Currents Hydrostatic pressure Keep measurements constant
Three types Tidal currents Oceanic conveyor Coriolis effect Hydrostatic pressure _atmospheres for _m Organisms adapt
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Environment Sediment Mainly soft, fine mud Thick 2 classes
Inorganic Biogenous Percentage? Types? Dependent on surface Whales Important We suck even more
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Food supply Production Dissolved Organic Matter
Chemosynthesis Sulfur compounds Mainly allochthonous Rely on POM 1-3%primary production reach seabed Dissolved Organic Matter Needed for carbon
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Food supply Large food falls
Carcasses Important food source Scavengers Unpredictable Long times between food sources Plant falls provide C Terrestrial matter is unused Think there is other food
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Food supply POM from euphotic Timing of food 3 main groups
Fecal pellets Moults Marine snow Grows like snow Timing of food Directly associated with surface blooms
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Organisms Slope Distribution Size of organisms
Hard to determine changes Distribution More in shallow then deep Size of organisms Generally Direct relationship Gigantism
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Organisms Diversity Composition Species Forbes Don’t know much
Assume little Composition Realized nice Small overlap of animal Species 1.4 million species on Earth
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Organisms Mobile megafauna Echinoderms Crustaceans Benthopelagic fish
Lobsters Ontogenetic Benthopelagic fish
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Hydrothermal vents First vent observed Atochthonous Thermophiles
1977 Galapagos rift By Robert Ballard Atochthonous Chemosynthesis Thermophiles Super Hyper Cold seeps
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Hydrothermal vents Vestimentarians Trophosome Lecitrophicism Worms
Special organ Holds bacteria Lecitrophicism Short larval stage
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