Deeper waters are usually more nutrient-rich, but upwelling (where deeper waters rise towards the surface) is reduced under El Niño, in turn reducing phytoplankton off the coast.
Deeper waters are usually more nutrient-rich, but upwelling (where deeper waters rise towards the surface) is reduced under El Niño, in turn reducing phytoplankton off the coast. Fishthat eat phytoplankton are affected, followed by other organisms higher up the food chain.. Warmer water also carries tropical species towards colder areas, disrupting multiple ecosystems.