Download - Marine Ecology Part II
Marine EcologyPart II
Read pgs. 365-371 in the
HRW BIOLOGY book
to answer Oceanography Ecosystems worksheet
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
Complete this activity for homework
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%
Label the producersAnd consumers…
10,000 kg
(handout in binder of examples of )SELF SUSTAINING MARINE
ECOSYSTEMS
Abyssal Plain Hydrothermal Vent
Sea Surface Upwelling System Coral Reef System
Calculating Productivity and energy(practice problems in binder)
• Producer to Consumer is inefficient 2-10%
• ?What are more efficient carnivores or herbivores???
Calculating Productivity and energy(practice problems in binder)
• Producer to Consumer is inefficient 2-10%
• ?What are more efficient carnivores or herbivores??? CARNIVORES
PE= 10% PE= 40%
PE= 1-3%
Production efficiency
DetritivoresHeat
33/100=33%
Production Efficiency=NSP/Assimilation of NPP
Growth efficiency 33/200 = 16.5%
Ingested food absorbed indigestible
leaves by the gut parts
215 g/day = 96 g/day + _____ g/day
Ingested food absorbed indigestible
leaves by the gut parts
215 g/day = 96 g/day + _119_ g/day
Ingested food absorbed indigestible
leaves by the gut parts
215 g/day = 96 g/day + 119 g/day
respiration growth/repair
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
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
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
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 =__________
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 %
Examples in binder (homework)
VI MATERIALS CYCLING (handout in binder of 3 cycles)
Carbon, nitrogen, phosphorus• Nutrients are mainly cycled out of the
photic zone
P
C
D
Dissolved Nutrients
Organic Form (living)
Organic Form
(Non-living) Photosynthesis
Respiration
Death
Excretion
Complex Bacterial Process for various nutrients
Decomposers in action
• Carbon- may be w/ or w/o bacteria
• Nitrogen- 3 bacterial steps
• Phosphorus- 1 bacterial step
71%
MASSIVE INFLUX OF PHOSPHATES OCCURRED IN THE 1970’S 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.
Large scale eutrophication: Dead Zone in the Gulf of Mexico
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
OOLITES
MAGNESIUM NODULE
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