Marine Primary Production

• T or F: Marine primary production plays a crucial role in global carbon cycle

  True
• T or F: Marine primary production supports nearly all marine life

  True
• T or F: marine primary production involves the conversion of inorganic compounds such as CO2 into organic matter

  True
• T or F: Marine primary production is not solar-driven photosynthesis

  False
• Gross Primary Production (or Total Production)

  • Total amount of organic matter produced
  • Respiration
  • Net Primary Production
• • Gross Primary Prod = Net Primary Prod + Respiration
• T or F: Upwelling or ocean currents generated by upwelling or ocean currents

  True
• Regenerated production


  recycled nutrients
• New production


  Nutrients from outside the system
• T or F: NPR is high in coastal areas due to upwelling, river discharge, light availability, and mixing and turbulence

  True

  
• T or F: Major key players in marine primary production

  • Diatoms
  • Cyanobacteria
  • Dinoflagellates
  • Seaweeds
  • Seagrasses
  • True
• Factors affecting marine primary production

  • light availability
  • nutrient availability
  • Temperature
  • Ocean circulation
• Redfield Ratio

  104C : 16N : 1P
• T or F: marine systems are typically N-limited

  True
• T or F: Trace elements like Fe can also be limiting

  True
• T or F: Light availability is limited with depth, turbidity, and time of the day

  True
• T or F: Warmer temperatures = less productivity

  False
• T or F: Extreme temperatures can be disruptive

  True
• T or F: Upwelling boosts production

  True
• T or F: marine production regulates atmospheric CO2 levels

  True
• T or F: marine production influences global climate

  True
• T or F: marine production provides habitat and nursery grounds for many marine species

  True
• T or F: marine production provides food for all organisms

  True
• Threats to marine production are

  • Climate change
  • pollution
  • overfishing
• T or F: example of pollution caused by zooplankton are microplastics


  True
• T or F: climate change increases temperature, causes ocean acidification, and altered weather patterns

  true
• T or F: overfishing leads to trophic cascade

  True
• Trophic cascades can be controlled through top-down control, bottom-up, or both

  
• Upwelling


  This is the movement of deep, cold, nutrient-rich ocean water towards the surface
• T or F: The driving forces of upwelling are prevailing winds and geographic features such as coastlines

  True
• T or F: Upwelling occurs in generally all coastal regions

  False
• T or F: One of the drivers of upwelling is Earth's rotation or specifically coriolis effect

  True
• Coriolis effect

  A) Coastal upwelling

  
• Coriolis effect

  A) Equatorial upwelling

  
• Coriolis effect

  Deflects surface currents and contributes to upwelling along the equator and western boundaries
• Types of upwelling

  • Continuous
  • Seasonal
  • Others
• T or F: Both Continuous and seasonal upwelling are wind-driven

  True
• T or F: Upwelling causes nutrients to rise up at the water surface wherein it triggers growth of phytoplankton leading to the decrease of zooplankton populations

  False
• T or F: Upwelling causes abundance of fish at surface water

  True
• T or F: Upwelling helps coral reefs through thermal refugia

  True