Acknowledgements
Wededicate this paper to the memory of John H. Ryther (1922–2006),
whose seminal research on nutrients and primary production in the
Sargasso Sea inspired this research. We thank the captains and crews
of the RV Columbus Iselin, RV Calanus, RV Weatherbird, and RV Cape
Hatteras for their support of the shipboard studies. Julie Bishop, Luigi
Ferrer, Richard Brown, Barbara Brown, Mark Clark and William Matzie
provided technical assistance. Ken Lindeman is gratefully acknowledged
for help with the design and construction of the purse seine
net. An early draft of this paper was improved by Laura Herren, Margaret
Vogel and the comments of several anonymous reviewers. This
research was supported by NSF grants OCE 85–15492 and OCE 88–
12055 and a RedWright Fellowship from the Bermuda Biological Station.
This is contribution number 1919 from the Harbor Branch Oceanographic
Institute at Florida Atlantic University. [SS]