Summary
Summary Marine Animal Ecology (MAE-30306)
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Marine Animal Ecology Course Summary
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Marine Animal EcologyDifference animal ecology
Aqueous versus gaseous environment
Food availability is higher in marine realm
Sedentary lifestyle
o Stuck to sea floor
Filter feeding
Pressure
Less energy into stability
Gas exchange – oxygen availability
o Oxygen density 100 times lower in marine realm
pH
2 systems in marine realm
Pelagic system
o Water part
Benthic system
o Floor part
Traits and Interactions
Traits individual level
Interactions community level
Traits
Features and capabilities that animals possess
Interactions
Competition
o Space
o Food
Trophic
o Predator – prey
Symbiosis
Benthic pelagic coupling
Coupling of the food chains of the benthic and pelagic system
o Sponges and shellfish eating DOM from pelagic systems
, Ocean physics and early lives
stages
Ocean physics
Highly related to water flow
Reynolds number
Re = p * U * I / µ
o p = fluid density
o U = fluid velocity
o I = characteristic length of object
o µ = dynamic viscosity
Ratio between dynamic forces and viscous forces
Re < 1: laminar flow
Re > 1: turbulent flow
Closer to the sea floor the water flow will diminish
Diffuse Boundary Layer (DBL)
No flow: mass transfer only through diffusion
Smooth surface Low Reynolds number thicker boundary layer more problems with gas
exchange
Rough surface High Reynolds number thinner boundary layer
Reproduction
Production
o K species
Few offspring
Intensive nursery
Live bearing
o R species
Much offspring
Little to nu nursery
Recruitment
o Successful establishment of a new
generation
Successful: new generation starts to reproduce itself
Corals have two strategies for sexual reproduction
Brooding
o Internal fertilization, release of juvenile or larvae
Broadcasting
o External fertilization, mass spawning
Larvae: two phases
Become competent to settle
Find place to settle
Depends on
o Predation
o Current
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