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Ch 13 Marine Life Producers and consumers Trophic level and food web Limiting factors Taxonomy PowerPoint Presentation
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Ch 13 Marine Life Producers and consumers Trophic level and food web Limiting factors Taxonomy . Living organisms Energy Entropy Photosynthesis Chlorophyll Producer Glucose = food = stored chemical energy 6CO 2 + 6H 2 O  C 6 H 12 O 6 + 6O 2

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Presentation Transcript
slide1

Ch 13 Marine Life

    • Producers and consumers
    • Trophic level and food web
    • Limiting factors
    • Taxonomy
slide2

Living organisms

    • Energy
    • Entropy
  • Photosynthesis
    • Chlorophyll
    • Producer
    • Glucose = food = stored chemical energy
        • 6CO2 + 6H2O  C6H12O6 + 6O2
        • Carbon dioxide water glucose oxygen
slide3

Primary productivity in the ocean

    • =bound carbon in gC/m2 yr
  • Biomass production/ yr ~ 10 x carbon content of primary producer/ yr

Diatom Coscinodiscus

slide5

Autotroph

    • Primary producer
  • Heterotroph
    • Primary consumer
      • herbivore
    • Secondary consumer
      • carnivore
    • Top consumer

Shark

Photo from http://www.tahiti.pictures-pacific.com/bora-bora/shark.jpg

slide6

Trophic pyramid

Trophic level

slide8

Essential for marine life

    • Essential elements: carbon, nitrogen, oxygen, hydrogen = 99% of living mass
    • Light
    • Heat

Nitrogen cycle

Nitrogen gas N2 Nitrate NO3-

Nitrite NO2- Ammonia NH3

Ammonium NH4+ DON = dissolved organic nitrogen

slide9
Nutrient
    • Nitrogen, carbon, phosphorus, potassium
    • Silicate, iron, copper, manganese, zinc
  • Limiting nutrient or other factor
slide10

Visible light penetration in water

    • Turbidity
    • Photic zone
    • Aphotic zone
slide11

Euphotic zone

    • photosynthesis
  • Disphotic zone
    • Visible light only
slide12

Endothermic walrus

Ectothermic fish

  • Temperature
    • Metabolic rate
    • Ectothermic
    • Endothermic
slide13
Dissolved gas
  • pH
  • Hydrostatic pressure

Photo from http://www.bslwater.com/images/daf_for_water/bubbles.jpg

slide14

Salinity

    • Diffusion
    • Osmosis
    • Active transport (reverse osmosis)
slide15

Osmosis

    • Hypertonic
    • Isotonic
    • Hypotonic

hypertonic hypotonic isotonic

slide17

Ocean zones

  • Pelagic (horizontal) zones
    • Neritic
    • Oceanic
  • Benthic (bottom) zones
    • Littoral
    • Sublittoral
    • Bathyal
    • Abyssal
    • Hadal
fig 3 3
Fig. 3.3
  • Charles Darwin 1859
    • Evolution of organisms
    • Natural selection
slide20

horse

panda

Vestigial structures and other imperfections

whale

snake

slide21

Converging evolution

Iterative evolution

slide22

Prokaryote

  • Eukaryote
  • Taxonomy
    • Kingdom