1 / 17

Exploring Ocean Environments and Primary Productivity

Delve into the diverse oceanic environments, from the pelagic zones to the benthic regions, and understand the mechanisms of primary productivity. Discover the significance of light zones, primary producers, and the global patterns of ocean productivity. Explore the intricate food chains and energy transfer dynamics that sustain marine ecosystems.

coxc
Download Presentation

Exploring Ocean Environments and Primary Productivity

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Environments and Primary Productivity

  2. Environments • Pelagic……the water • Neritic – over continental shelf • Oceanic • Epipelagic: down to 200 m • Mesopelagic: 200-1000 m • Bathypelagic: 1000-4000 m • Benthic…..the bottom

  3. Neritic 200 m

  4. Oceanic Epipelagic Mesopelagic Bathypelagic 200 m 1000 m 4000 m

  5. Light zones in ocean • Photic • Light for photosynthesis • Usually 0-100 m • Aphotic • Without light • Deeper than 1000 m

  6. Benthic Environment • Similar zones as pelagic • Omit details and new names

  7. Making a living in the ocean • Primary productivity, respiration, decomposition • Depth zone differences • Differences between “climate” zones • Food chains and food webs

  8. Primary productivity • Photosynthesis carbon dioxide + water sugar + oxygen • Chemosynthesis hydrogen sulfide + water + oxygen + carbon dioxide sugar + sulfuric acid

  9. Primary productivity: rate at which biomass is produced by photosynthesis or chemosynthesis

  10. Respiration and decay • Basically the opposite of photosynthesis • Releases nutrients back into the ocean • Uses oxygen (consider other sources of oxygen to the ocean)

  11. Oxygen with depth (red) Nutrients with depth ( green) Relate pattern to photosynthesis, respiration, decay and other processes

  12. Example of primary producers • Algae • Diatoms • Coccolithophores • Dinoflagellates • Basis of food webs and ecosystems

  13. Variations in productivity verses latitude • Photic zone important for photosynthesis • Some areas of ocean are light limited, some are nutrient limited, some are both • Pictures can tell the story of relationships • Polar region • Equatorial region • Temperate region of ocean

  14. Global ocean productivity: What causes this pattern?

  15. Food webs and chains

  16. Efficiency of energy transfer:Relate to number of trophic levels Upwelling region Open ocean Coastal region

More Related