THE eastern equatorial Pacific Ocean is one of only three open-ocean regions where low
phytoplankton chlorophyll biomass persists despite perennially high nitrate and phosphate …

THE surface waters of the equatorial Pacific have unusually high nitrate and phosphate
concentrations, but relatively low phyto-plankton biomass1–3. This' high nitrate, low …

Abstract THE'iron hypothesis'1, 2 states that phytoplankton growth and biomass are limited
by low concentrations of available iron in large regions of the world's oceans where other …

The idea that iron might limit phytoplankton growth in large regions of the ocean has been
tested by enriching an area of 64 km2 in the open equatorial Pacific Ocean with iron. This …

Abstract Changes in iron supply to oceanic plankton are thought to have a significant effect
on concentrations of atmospheric carbon dioxide by altering rates of carbon sequestration, a …

DESPITE the controversy on the importance of iron in limiting phytoplankton growth and
affecting air–sea exchange of CO2 in the ocean1–4, there is very little information on cellular …

THE equatorial Pacific Ocean is a'high-nitrate, low-chlorophyll'region where nitrate and
phosphate are abundant all year round. These nutrients cannot therefore be limiting to …

Abstract THE iron hypothesis1–3—the suggestion that iron is a limiting nutrient for plankton
productivity and consequent CO2 drawdown—has been tested by small-scale experiments …

An interesting oceanographic problem concerns the excess major plant nutrients (PO4,
NO3, SiO3) occurring in offshore surface waters of the Antarctic1–3 and north-east Pacific …

The availability of iron limits primary productivity and the associated uptake of carbon over
large areas of the ocean. Iron thus plays an important role in the carbon cycle, and changes …