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Testing the iron hypothesis in ecosystems of the equatorial pacific ocean

Author(s): Martin JH, Coale KH, Johnson KS, Fitzwater SE, Gordon RM, Tanner SJ, Hunter CN, Elrod VA, Nowicki JL, Coley TL, Barber RT, Lindley S, Watson AJ, van Scoy K, Law CS, Liddicoat MI, Ling R, Stanton T, Stockel J, Collins C, Anderson A, Bidigare RR, Ondrusek M, Latasa M, Millero FJ, Lee K, Yao W, Zhang JZ, Friederich G, Sakamoto C, Chavez F, Buck K, Kolber Z, Greene R, Falkowski PG, Chisholm SW, Hoge F, Swift R, Yungel J, Turner SM, Nightingale P, Hatton A, Liss PS, Tindale NW

Published: September, 1994

Publisher: Nature

DOI: 10.1038/371123a0

Tags: Ocean Fertilization

URL: http://www.nature.com/nature/journal/v371/n6493/abs/371123a0.html

Abstract: 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 resulted in a doubling of plant biomass, a threefold increase in chlorophyll and a fourfold increase in plant production. Similar increases were found in a chlorophyll-rich plume down-stream of the Galapagos Islands, which was naturally enriched in iron. These findings indicate that iron limitation can control rates of phytoplankton productivity and biomass in the ocean.


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