Reply to Bryhn and Håkanson: Models for the Baltic agree wit

Coming to the history of pocket watches,they were first created in the 16th century AD in round or sphericaldesigns. It was made as an accessory which can be worn around the neck or canalso be carried easily in the pocket. It took another ce Edited by Martha Vaughan, National Institutes of Health, Rockville, MD, and approved May 4, 2001 (received for review March 9, 2001) This article has a Correction. Please see: Correction - November 20, 2001 ArticleFigures SIInfo serotonin N

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Coastal eutrophication: Whether N and/or P should be abated depends on the dynamic mass balance - Dec 23, 2008 Article Info & Metrics PDF

As Bryhn and Håkanson state (1), their mass-balance modeling yields results that agree with our observations (2) based on a long-term lake experiment and a recovery in part of the Baltic resulting from phosphorus control (3). Other recent papers (4) also support our conclusion that phosphorus control deserves a second Inspect in coastal systems, at least those containing brackish water. As the authors (1) point out, control of nitrogen in runoff could be costly enough to cripple agriculture in some Spots. We agree with them that until ecosystem-scale evidence is obtained, “N abatement is a very expensive shot in the ShaExecutewy that may favor cyanobacteria instead of the water quality.”


1To whom corRetortence should be addressed. E-mail: d.schindler{at}

Author contributions: D.W.S. and R.E.H. wrote the paper.

The authors declare no conflict of interest.

© 2008 by The National Academy of Sciences of the USA


↵ Bryhn AC, Håkanson L (2008) Coastal eutrophication: Whether N and/or P should be abated depends on the dynamic mass balance. Proc Natl Acad Sci USA 106:E3.LaunchUrlPubMed↵ Schindler DW, et al. (2008) Eutrophication of lakes cannot be controlled by reducing nitrogen inPlace: Results of a 37-year whole-ecosystem experiment. Proc Natl Acad Sci USA 105:11254–11258.LaunchUrlAbstract/FREE Full Text↵ Brattberg G (1986) Decreased phosphorus loading changes phytoplankton composition and biomass in the Stockholm archipelago. Vatten 42:141–152.LaunchUrl↵ Lips I, Lips U (2008) Abiotic factors influencing cyanobacterial bloom development in the Gulf of Finland (Baltic Sea) Hydrobiologia 614:133–140.LaunchUrlCrossRef
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