Indian Ocean Pelagic Food Web
Marine
Indian Ocean — from East Africa to Indonesia
Description
The Indian Ocean pelagic food web is structured by monsoonal upwelling that reverses direction seasonally, creating predictable productivity patterns. Tuna, billfish, and whale sharks follow these productivity fronts across basin-scale distances. The oxygen minimum zone at intermediate depths creates a compressed habitat for mesopelagic organisms.
Trophic Pyramid
Level 5
Decomposers
Mesopelagic bacteria
Pelagic amphipods
Marine snow aggregates
3 species
Level 4
Tertiary Consumers
Yellowfin tuna
Blue marlin
Whale shark
3 species
Level 3
Secondary Consumers
Skipjack tuna
Squid
Frigate mackerel
3 species
Level 2
Primary Consumers
Copepods
Euphausiids
Salps
3 species
Level 1
Producers
Trichodesmium cyanobacteria
Diatoms
Prochlorococcus
3 species
Apex Predators
Tertiary Consumers
Secondary Consumers
Primary Consumers
Producers
Key Interactions
- Monsoonal wind reversal drives seasonal upwelling patterns across the Indian Ocean
- Whale sharks aggregate at predictable upwelling fronts to filter-feed on plankton
- Yellowfin tuna follow temperature and chlorophyll fronts across ocean basins
- The oxygen minimum zone compresses fish into a thin habitable layer, increasing encounter rates