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Marine ecology

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Pregunta:

What is a trophic cascade?

Autor: Asger LIndberg-Nielsen



Respuesta:

Changes in biomass of one trophic level propagates to other trophic levels Top down: see picture Bottom up: Could also be increased primary production increases biomass on all other levels. Wasp waist: environmental effect on intermediate level propagates. Eksempel: Decline in capelin will have negative effect in cod population, positive in copopod and negative in phytoplankton.


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changes in biomass of one trophic level propagates to other trophic levels

Top down: 
see picture

Bottom up:
Could also be increased primary production increases biomass on all other levels.

Wasp waist: 
environmental effect on intermediate level
propagates. 
Eksempel:
Decline in capelin will have negative effect in cod population, positive in copopod and negative in phytoplankton.
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