Diel fluorescence patterns were discovered in phytoplankton sampled over 7000 kilometers
of the South Pacific Ocean that appear indicative of iron-limiting growth conditions. These …

We have performed an in situ test of the iron limitation hypothesis in the subarctic North
Pacific Ocean. A single enrichment of dissolved iron caused a large increase in …

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 …

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 …

In the oligotrophic North Atlantic and North Pacific, ultrafiltration studies show that
concentrations of soluble iron and soluble iron-binding organic ligands are much lower than …

The availability of iron is known to exert a controlling influence on biological productivity in
surface waters over large areas of the ocean and may have been an important factor in the …

The availability of iron, an essential nutrient, controls rates of phytoplankton primary
productivity in the open-ocean, upwelling ecosystems of the equatorial Pacific,. Upwelling …

Iron supply has a key role in stimulating phytoplankton blooms in high-nitrate low-
chlorophyll oceanic waters,,,,. However, the fate of the carbon fixed by these blooms, and …

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 sub-optimal growth of phytoplankton and the resulting persistence of unutilized plant
nutrients (nitrate and phosphate) in the surface waters of certain ocean regions has been a …