The Deep Sea By Brady Romero
Intro Undocumented What is it? Physically Environmentally Biologically http://www.youtube.com/watch?v=Uqly8ERIkHM
Physically Beneath continental shelf Originally thought as flat Order of shelf? Originally thought as flat Trench benthic zone? http://www.youtube.com/channel/UCl3Vf8heuOumLuC_toRYGXg
Our problems We know nothing Bathysnap Expensive Hard Time consuming Inaccurate Bathysnap Camera Bathysnack
Environment Light Temperature Dissolved oxygen Order? Food? Exceptions? Temperature Constant -1* to 4* Celsius Dissolved oxygen Minimum under _____ Then constant
Environment Currents Hydrostatic pressure Keep measurements constant Three types Tidal currents Oceanic conveyor Coriolis effect Hydrostatic pressure _atmospheres for _m Organisms adapt http://www.youtube.com/watch?v=GnekAQTbEcI
Environment Sediment Mainly soft, fine mud Thick 2 classes Inorganic Biogenous Percentage? Types? Dependent on surface Whales Important We suck even more
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 http://www.youtube.com/watch?v=ufxGw8EqY5Q
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 http://www.youtube.com/watch?v=2ykxQwleMo4
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 http://www.youtube.com/watch?v=-Hi5muM44NE
Organisms Slope Distribution Size of organisms Hard to determine changes Distribution More in shallow then deep Size of organisms Generally Direct relationship Gigantism
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
Organisms Mobile megafauna Echinoderms Crustaceans Benthopelagic fish Lobsters Ontogenetic Benthopelagic fish http://www.youtube.com/watch?v=2ykxQwleMo4
Hydrothermal vents First vent observed Atochthonous Thermophiles 1977 Galapagos rift By Robert Ballard Atochthonous Chemosynthesis Thermophiles Super Hyper Cold seeps
Hydrothermal vents Vestimentarians Trophosome Lecitrophicism Worms Special organ Holds bacteria Lecitrophicism Short larval stage http://www.youtube.com/watch?v=BtmXN_tH2iM