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Oceanography voc 8
Marine Habitat and Productivity, energy transfer
20
Other
Undergraduate 1
03/29/2009

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Term
Trophic Level
Definition
Nourishment level in a food chain Algal produces constitute the lowest level followed by herbivores and a series of carnivores at the highest levels.
Term
Heterotrophic
Definition
Animals and bacteria that depends on the organic compounds produced by other animals and plants as food. Organism not capable of producing their own food by photosynthesis
Term
Food Web
Definition
A group of interrelated food chains.
Term
Eutrophic
Definition
An abundance of nutrients
Term
Chemosythesis
Definition
Formation of organic compounds from inorganic substance using energy derived form oxidation
Term
Oligotrophic
Definition
Areas such as the middle of subtropical gyres where there are low levels of biological production.
Term
Primary productivity
Definition
Amount of organic matter synthersized by organisms from inorganic substances with a given volume of water or habitat in a unit of time
Term
Benthic enviroment
Definition
pertaining to the ocean bottom
Term
Infauna
Definition
Animal that live buried in the soft substate
Term
Euphotic Zone
Definition
Layer that extends from the surface of the ocean to a depth where enough light exist to support photosynthesis, rarely deeper than 100 meter.
Term
Bioluminescence
Definition
Light produced in living organisms by chemical reaction. Found in bacteria, phytoplankton and metazoans
Term
Abyssal Zone
Definition
The benthic enviroment between 4000 and 6000 meter
Term
Food Chain
Definition
The passage of energy materials from producers through a sequence of herbivores and carnivores
Term
Commensalism
Definition
Asynbiotic relationship in which one organism benefits at not expense to its host.
Term
Autotrophic
Definition
Plant or bacterium that can synthesize organic compounds form inorganic nutrients
Term
Pelagic envioment
Definition
Open ocean enviroment divided into the neritic province(water depth 0 to 200 meter) and the oceanic province (water depth greater than 200 meter)
Term
Nekton
Definition
Pelagic animals such as adult squids fish and mammals that are active swimmers to the extent they can determine their position in the ocean by swimming
Term
Detritus
Definition
Any loose material produced directly from rock disintegration. Material resulting from the disintegration of dead organic remains.
Term
Biomass
Definition
Total weight of the organisms in a particular habitat, species or group of species
Term
Epifauna
Definition
Animals that live on the ocean bottom either attached or moving freely over it.
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