Marine Ecology Part II

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Marine EcologyPart II

• Read pgs. 365-371 in the
• HRW BIOLOGY book
• to answer Oceanography Ecosystems worksheet

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IV. FOOD CHAINS AND WEBS

• (handout in binder can be done for homework)
• Practice problem using overhead example.
• count members,
• lengths of chains
• name categories

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Complete this activity for homework
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V. TROPHIC LEVELS (handout in binder of pyramid
of biomass)

• Modify the pyramid with these ideas
• Biomass dry weight, measured in kilograms
• Can also be a pyramid of numbers and energy
  measured in Cal/g or Joules/g
• Identify producers, consumers, and add
  decomposers
• Trace flow of energy and materials
  10 and 90

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Label the producers And consumers
10,000 kg
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(handout in binder of examples of )SELF
SUSTAINING MARINE ECOSYSTEMS
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Abyssal Plain
Hydrothermal Vent
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Sea Surface Upwelling System
Coral Reef System
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Calculating Productivity and energy(practice
problems in binder)

• Producer to Consumer is inefficient 2-10
• ?What are more efficient carnivores or
  herbivores???

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Calculating Productivity and energy(practice
problems in binder)

• Producer to Consumer is inefficient 2-10
• ?What are more efficient carnivores or
  herbivores??? CARNIVORES

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Production efficiency
PE 1-3
PE 10
PE 40
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Growth efficiency 33/200 16.5
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• Ingested food absorbed
  indigestible
• leaves by the gut
  parts
• 215 g/day 96 g/day _____ g/day

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• Ingested food absorbed
  indigestible
• leaves by the gut
  parts
• 215 g/day 96 g/day _119_ g/day

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• Ingested food absorbed
  indigestible
• leaves by the gut
  parts
• 215 g/day 96 g/day 119 g/day
• respiration growth/repair

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• Ingested food absorbed
  indigestible
• leaves by the gut
  parts
• 215 g/day 96 g/day 119 g/day
• respiration growth/repair
• 65 g/ day ____ g/day

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• Ingested food absorbed
  indigestible
• leaves by the gut
  parts
• 215 g/day 96 g/day 119 g/day
• respiration growth/repair
• 65 g/ day 31 g/day

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• Ingested food absorbed
  indigestible
• leaves by the gut
  parts
• 215 g/day 96 g/day 119 g/day
• respiration growth/repair
• 65 g/ day 31 g/day

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• Ingested food absorbed
  indigestible
• leaves by the gut
  parts
• 215 g/day 96 g/day 119 g/day
• respiration growth/repair
• 65 g/ day 31 g/day

ABSORPTION EFFICIENCY 96/215 X 100
_____ Growth efficiency 31/215 x 100
__________
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• Ingested food absorbed
  indigestible
• leaves by the gut
  parts
• 215 g/day 96 g/day 119 g/day
• respiration growth/repair
• 65 g/ day 31 g/day

ABSORPTION EFFICIENCY 96/215 X 100
44.7 Growth efficiency 31/215 x 100
14.4
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Examples in binder (homework)
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VI MATERIALS CYCLING (handout in binder of 3
cycles)Carbon, nitrogen, phosphorus

• Nutrients are mainly cycled out of the photic
  zone

P
C
D
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Complex Bacterial Process for various nutrients
Dissolved Nutrients
Organic Form (Non-living)
Photosynthesis
Respiration Death Excretion
Organic Form (living)
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Decomposers in action

• Carbon- may be w/ or w/o bacteria
• Nitrogen- 3 bacterial steps
• Phosphorus- 1 bacterial step

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71
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MASSIVE INFLUX OF PHOSPHATES OCCURRED IN THE
1970S INTO LAKE ERIE. IT WAS ADDED TO
DETERGENTS AND CAUSED OVER FERTILIZATION OF THE
ALGAE. SUBSEQUENT DEATH OF THE ALGAE CAUSED
DECOMPOSERS TO USE UP THE OXYGEN IN THE WATER AND
SUFFICATE FISH.
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Large scale eutrophication Dead Zone in the
Gulf of Mexico
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VII SEDIMENTS- origin of sediment components 4
types

• lithogenous/ terrigenous/ clastic- derived from
  continents (silts, clays, and sands)
• biogenic- plant and animal remains, (usually
  microscopic carbonates and silicates)
• hydrogenous- chemical precipitates from water
  (magnesium nodules, oolites- limestone)
• cosmogenous- micrometeorites

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OOLITES
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MAGNESIUM NODULE
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Test Topics for Tuesday

• biotic/abiotic zonation (must know diagrams)
  ecosystems, food web/chain (ID members and
  interpret changes)
• phylum matching (characteristics and members)
• absorption/growth efficiencies calculations
• Biogeochemical cycles
• nitrogen, carbon, phosphorus
• Crossword, Oceanography Ecosystems worksheet
• Video The Deep
• TEXT PAGES Read 279-292, 296-299

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