https www youtube comwatch vp 0 G 68
![https: //www. youtube. com/watch? v=p 0 G 68 ORc 8 u. Q Deep Ocean https: //www. youtube. com/watch? v=p 0 G 68 ORc 8 u. Q Deep Ocean](https://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-1.jpg)
https: //www. youtube. com/watch? v=p 0 G 68 ORc 8 u. Q Deep Ocean �Not much light penetrates deeper than 200 m = 600 ft �Photosynthesis not possible �Producers (autotrophs = self feeders) here must find substances by other means �Life without sunlight: https: //www. youtube. com/ watch? v=-3 m. PEPj. Ony. I
![Chemosynthesis �captures the chemical energy of dissolved minerals �chemosynthetic bacteria at hydrothermal vents make Chemosynthesis �captures the chemical energy of dissolved minerals �chemosynthetic bacteria at hydrothermal vents make](http://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-2.jpg)
Chemosynthesis �captures the chemical energy of dissolved minerals �chemosynthetic bacteria at hydrothermal vents make energy available to the food chain in the deep sea �Only some species of bacteria derive energy from the oxidation of inorganic substances (like hydrogen sulphide), and use this energy to synthesize organic compounds
![Hydrothermal Vents �Fluid emerging from hydrothermal vents is rich in hydrogen sulphide and other Hydrothermal Vents �Fluid emerging from hydrothermal vents is rich in hydrogen sulphide and other](http://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-3.jpg)
Hydrothermal Vents �Fluid emerging from hydrothermal vents is rich in hydrogen sulphide and other gases. � Chemosynthetic bacteria oxidize H 2 S and fix CO 2 to form organic substances � Provide food source for animals in the hydrothermal vent ecosystem � Example: � tube worm � giant clams
![Riftia �Symbiotic relationship with chemosynthetic bacteria �Provide nutrients TO Riftia �Extremophile: An organism that Riftia �Symbiotic relationship with chemosynthetic bacteria �Provide nutrients TO Riftia �Extremophile: An organism that](http://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-4.jpg)
Riftia �Symbiotic relationship with chemosynthetic bacteria �Provide nutrients TO Riftia �Extremophile: An organism that is adapted to survive EXTREMES �Temperature �Pressure �Salinity �p. H
![Comparison: Chemo vs Photo Comparison: Chemo vs Photo](http://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-5.jpg)
Comparison: Chemo vs Photo
![Self-Assessment �Draw out and complete the following table to compare photosynthesis and chemosynthesis in Self-Assessment �Draw out and complete the following table to compare photosynthesis and chemosynthesis in](http://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-6.jpg)
Self-Assessment �Draw out and complete the following table to compare photosynthesis and chemosynthesis in ocean ecosystems. Feature Energy source Products Type of organism Main location in ocean Chemosynthesis Photosynthesis
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![Practice Assessment 1. Compare the ways in which vent bacteria and phytoplankton make energy Practice Assessment 1. Compare the ways in which vent bacteria and phytoplankton make energy](http://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-8.jpg)
Practice Assessment 1. Compare the ways in which vent bacteria and phytoplankton make energy available to these food chains. [3] 2. List three reasons why phytoplankton cannot survive at a hydrothermal vent. [3]
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![Productivity �The rate of accumulation/production of biomass/energy �Biomass = the mass of living biological Productivity �The rate of accumulation/production of biomass/energy �Biomass = the mass of living biological](http://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-10.jpg)
Productivity �The rate of accumulation/production of biomass/energy �Biomass = the mass of living biological organisms in an ecosystem at a given time �Measured in terms of energy capture per unit area (or per unit volume in aquatic ecosystems) per year
![Productivity �Almost all ecosystems = green plants are primary producers �Refer to primary production Productivity �Almost all ecosystems = green plants are primary producers �Refer to primary production](http://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-11.jpg)
Productivity �Almost all ecosystems = green plants are primary producers �Refer to primary production in relation to plants �Consumers depend directly or indirectly on the energy captured by primary producers �Productivity of an ecosystem affects all trophic levels
![Productivity �When conditions are favorable for photosynthesis, the productivity of the ecosystem tends to Productivity �When conditions are favorable for photosynthesis, the productivity of the ecosystem tends to](http://slidetodoc.com/presentation_image_h/92562e883c34ecc14614dbbf1f5a3079/image-12.jpg)
Productivity �When conditions are favorable for photosynthesis, the productivity of the ecosystem tends to be relatively high �Example: �tropical rain forests �algal beds and reefs The Biological Productivity of the Ocean https: //www. nature. com/scitable/knowledge/library/the-biological-productivityof-the-ocean-70631104
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