-Autotrophic: !No material of organic origin is required for growth and reproduction! -Auxotrophic: !Physiological requirement for one ormore organic compounds, but C is obtained autotrophically! -Heterotrophic: !Growth depends on organic material! -Mixotrophic: !Autotrophic and heterotrophic nutrition!
Ecosystem Energy flow: Primary and Secondary Production
Primary Production: Net rate of synthesis of organic material from inorganic compounds such as CO2 and water! Secondary Production: Net rate of synthesis of organic matter resulting from the assimilation of organic compounds supplied by primary production
Food Chain and Trophic Levels
Food Chain: A linear sequence showing! which organisms consume which other! organisms, making a series of trophic levels Trophic levels – 1st =Primary Producer • Ex: plants, algae – 2nd = Primary Consumer• Ex: Grazer, herbivores – 3rd = Secondary Consumer• Ex: Carnivores – 4th = Tertiary Consumer, etc… -At each level, detritivores and decomposers are turning biomass into nutrients. Ex. Whale to Krill to Phytoplankton
Diagram showing feeding relationships among organisms within an ecosytem, notrestricted to a linear hierarchy!
Abiotic factors controlled by
1) Geology (depth, nutrients)! !2) Properties of water ! !3) Sun (heat)! !4) Spinning of the Earth (coriolis effect)!
Highest in Pacific, is a fuction of Gelogy, varies among season and latitudes, North Pacific has highest productivity is a result of Thermohaline circulation. Also E. equatorial Pacific has high productivity. Upwelling is caused by ekman tranport a fucntion of the coriolis effect.
Want to see the other 6 Flashcards in Exam 2 Lec 8?JOIN TODAY FOR FREE!