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Marine Productivity
Oceanography: Marine Productivity Unit (Ch10)
| Term | Definition |
|---|---|
| ecology | study of biotic and abiotic parts |
| biotic | living things |
| abiotic | non-living things |
| food | edible stuff that is manufactured and passed on in the food chain |
| autotroph | producer, organism that makes its own food |
| heterotroph | consumer, organism that must eat other organisms as food |
| herbivore | organism that must eat autotrophs |
| carnivore | organism that must eat heterotrophs but not autotrophs |
| omnivore | organism that eats both autotrophs and heterotrophs |
| decomposer | organism that eats dead or decaying matter |
| detritivore | organism that eats trash or detritus |
| food chain | feeding sequence of organisms through which energy and matter is transferred but does not show biomass or cross-relationships |
| trophic level | layer of production and consumption |
| food web | the combination of multiple food chains |
| ecologic efficiency | percentage of energy that passes from one trophic level to the next (10%) |
| biomass | total mass of organic tissue present within a group of living organisms |
| biomass pyramid | graphical representation of the biomass in each trophic level of a food chain |
| primary consumer | an herbivore, first consumer in a food chain or web, eats producers/autotrophs |
| secondary consumer | a carnivore who eats herbivores, second consumer in a food chain or web |
| net primary production | amount of carbon fixed by photosynthesis that goes into growth |
| macronutrients | Nitrogen, Potassium, Phosphorus, and Silicon required in large doses for photosynthesis |
| micronutrients | iron, copper, manganese, zinc, boron, and cobalt required in small doses for photosynthesis |
| turbulence | the irregular, chaotic flow of fluids |
| turbidity | muddy water supplied by river outlets that decreases light penetration |
| upwelling | the most productive areas of the ocean, largely at equator and continental coastlines |
| dead zones | areas with oxygen levels too low for animal life, caused by excessive nitrogen and phosphorus |
| Chesapeake Bay | 15% of this body of water was a dead zone in 2012 |
| Diatom Bloom | primary productivity increasing with longer daylight hours in spring |
| migration | movement of large marine animals like salmon or whales toward areas of increased productivity |
| transfer efficiency | 10% carbon passed up each level of the food chain |
| El Nino | condition at pacific equatorial region where thermocline drops, trade winds slow, and primary productivity is reduced |
| La Nina | condition at the Pacific equatorial region with high Trade Winds, elevated thermocline, and high primary productivity |
| anoxic | region of water where oxygen levels are too low to sustain animal life, a.k.a. dead zone |
Created by:
tejneckyc
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