Oceanography Test Ch 12 16 What are the 3 domains of life Ch 12 Section The Three Domains Bacteria Archea Eukaria What marine organism represents the vast majority of the ocean s biomass Ch 12 Section How Are Marine Organisms Classified Ch 12 A of Life Plankton Plankton are organisms that float Why is a copepod which can swim and propel itself through the water classified as plankton Ch 12 Section Plankton Heterotrophic zooplankton Holoplankton Microplankton Plankton because of its small size it cannot swim fast or far so location determined by currents Organisms that can photosynthesize and produce their own food are called what Ch 12 Section Plankton Organisms that only spend part of their life cycle as plankton are referred to as what Ch 12 Section Plankton autotrophic meroplankton What are nektobenthos Ch 12 Section Benthos Organisms that live on the bottom but can crawl through the water What is the primary factor that limits life on the deep ocean floor Ch 12 Section Benthos Limited food supply Of Earth s total number of species why are the fewest in the marine pelagic realm Ch 12 Section How Many Marine Species Exist Uniform conditions in the pelagic realm make fewer specialized environments Why is the surface area to volume ratio important for phytoplankton Ch 12 Section Water s Viscosity Larger ratio provides higher resistance to sinking and less energy to stay afloat Why do most fish and marine mammals have the same torpedo like streamlined shape Ch 12 Section Water s Viscosity The streamlined shape minimizes the energy expended to move through the water Ch 12 B Most fresh water fish are hypertonic meaning their body cells contain more salt than the surrounding water Since osmosis should push water into their cells why don t they explode Ch 12 Section Salinity Do not drink water cells absorb salt secrete large volume of dilute urine What is the primary difference between pelagic environment zones below the photic zone Ch 12 Section What Are Living Things and How Are They Classified Increasing pressure with increasing depth What are the reasons the ocean has a smaller daily seasonal and annual temperature range than that experienced on land Ch 12 Section Temperature More evaporation Transparency and water flow distribute heat Can hold more heat and takes more heat to change temp All of the above Temperature Hypertonic Pressure What is the definition of eurythermal Ch 12 Section Organisms that can tolerate large changes in temperature Freshwater fish are isotonic hypertonic or hypotonic relative to their environment Ch 12 Section Salinity How does water pressure change with depth Ch 12 Section Pressure increases with depth What is the euphotic zone Ch 12 Section What are the main divisions of the marine environment The zone where there is enough light to support photosynthesis What are the 4 biozones of the oceanic province Ch 12 Section What are the main divisions of the marine environment Epipelagic Mesopelagic Bathypelagic Abyssopelagic What is the neritic province Ch 12 Section What are the main divisions of the marine environment The zone with water depths less than 200 meters What is the deepest zone of the suboceanic province Ch 12 Section Benthic Environment Hadal zone Ch 13 A Biological oceanographers discuss about biomass frequently Just what is biomass Ch 13 Section What is Primary Productivity The total mass of all organisms of a given class What is the difference between gross primary productivity and net primary productivity Ch 13 Section What Kind of Photosynthetic Marine Organisms Exist Gross productivity is the amount of organic carbon created by photosynthesis per unit of time and net productivity is the gross minus the amount of organic carbon consumed by the photosynthesizers What are the two primary factors that control biologic productivity in the surface oceans Ch 13 Section Factors Affecting Primary Productivity Nutrients and sunlight Productivity Vary What is the biological pump Ch 13 Section How Does Regional The removal of organic matter and nutrients from surface water to deep water through the sinking of dead surface dwelling organisms Why is upwelling such an important factor in creating areas of high biologic productivity Ch 13 Section How Does Regional Productivity Vary Upwelling brings nutrient rich deep water to the surface where productivity is limited by the availability of nutrients Why are sessile plant like macroalgae i e those attached to the ocean bottom only found in littoral and sub littoral environments Ch 13 Sections 13 2 Section Macroscopic Large Algae They require light to reach the ocean bottom which only occurs in these two zones Given what you know about surface productivity where do you think that sunlight penetrates deepest into the ocean Ch 13 Figure 13 6 In photosynthesis what two things must come together with light energy input to produce sugar and oxygen Ch 13 Section What Is Primary Productivity Middle gyre Water and CO2 Ocean Water What influences ocean color Ch 13 Section Light Transmission in The level of turbidity as a result of runoff the level of photosynthetic pigment which has a positive correlation with biological production D The amount of suspended sediments and photosynthetic organisms What is responsible for the red tide phenomenon Ch 13 Section Microscopic Small Algae Red tide occurs in patches of water where certain species of dinoflagellates flourish Ch 13 B What are the 3 basic categories of organism that exist within an ecosystem Section 13 4 How are energy and nutrients passed along in marine ecosystems Producers Consumers and Decomposers What is suspension feeding Section 13 5 What Oceanic Feeding Relationships Exist The use of specialized structure to filter water for food What is the gross ecological efficiency Section 13 5 What Oceanic Feeding Relationships Exist The energy passed on to the next higher trophic level divided by the energy received from the trophic level below What is a food chain Section 13 5 What Oceanic Feeding Relationships Exist Sequence of organisms through which energy is transferred What is a food web Section 13 5 What Oceanic Feeding Relationships Exist A feeding relationship between all organisms in an ecosystem What is a biomass pyramid Section 13 5 What Oceanic Feeding Relationships Exist At successive higher trophic levels the number of individuals and total biomass decrease What is meant by the term fisheries Section 13 6 What Issues Affect Marine Fisheries Fish
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