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Science 1 June 2007:
Vol. 316. no. 5829, p. 1281
DOI: 10.1126/science.316.5829.1281a
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Letters
Biodiversity Loss in the Ocean: How Bad Is It?
Steven Murawski, Richard Methot, Galen Tromble; Ray W. Hilborn; John C. Briggs; Response Boris Worm, Edward B. Barbier, Nicola Beaumont, J. Emmett Duffy, Carl Folke, Benjamin S. Halpern, Jeremy B. C. Jackson, Heike K. Lotze, Fiorenza Micheli, Stephen R. Palumbi, Enric Sala, Kimberley A. Selkoe, John J. Stachowicz, Reg Watson |
How to Submit a Letter to the Editor
Technical Comment Abstracts
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COMMENT ON "Impacts of Biodiversity Loss on Ocean Ecosystem Services"
John Jaenike
Abstract: Worm et al. (Research Articles, 3 November 2006, p. 787) used a power relation to predict a global collapse of fisheries by the year 2048. However, a linear regression of the data for the past 40 years yields an excellent fit, with a predicted date of collapse of 2114. Thus, long-term projections of fisheries collapse are highly dependent on the specific statistical model used.
Full text at www.sciencemag.org/cgi/content/full/316/5829/1285a
COMMENT ON "Impacts of Biodiversity Loss on Ocean Ecosystem Services"
Michael J. Wilberg, Thomas J. Miller
Abstract: Worm et al. (Research Articles, 3 November 2006, p. 787) reported an increasing proportion of fisheries in a "collapsed" state. We show that this may be an artifact of their definition of collapse as a fixed percentage of the maximum and that an increase in the number of managed fisheries could produce similar patterns as an increase in fisheries with catches below 10% of the maximum.
Full text at www.sciencemag.org/cgi/content/full/316/5829/1285b
COMMENT ON "Impacts of Biodiversity Loss on Ocean Ecosystem Services"
Franz Hölker, Doug Beare, Hendrik Dörner, Antonio di Natale, Hans-Joachim Rätz, Axel Temming, John Casey
Abstract: Worm et al. (Research Articles, 3 November 2006, p. 787) investigated the importance of biodiversity to marine ecosystem services across temporal and spatial scales. In projecting the extent of future fisheries collapse, we argue that the authors inappropriately extrapolated beyond their available observations and used data on marine reserves and fishery closures that are not representative of global fisheries.
Full text at www.sciencemag.org/cgi/content/full/316/5829/1285c
RESPONSE TO COMMENTS ON "Impacts of Biodiversity Loss on Ocean Ecosystem Services"
Boris Worm, Edward B. Barbier, Nicola Beaumont, J. Emmett Duffy, Carl Folke, Benjamin S. Halpern, Jeremy B. C. Jackson, Heike K. Lotze, Fiorenza Micheli, Stephen R. Palumbi, Enric Sala, Kimberley A. Selkoe, John J. Stachowicz, Reg Watson
Abstract: We show that globally declining fisheries catch trends cannot be explained by random processes and are consistent with declining stock abundance trends. Future projections are inherently uncertain but may provide a benchmark against which to assess the effectiveness of conservation measures. Marine reserves and fisheries closures are among those measures and can be equally effective in tropical and temperate areas--but must be combined with catch-, effort-, and gear restrictions to meet global conservation objectives.
Full text at www.sciencemag.org/cgi/content/full/316/5829/1285d
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Science. ISSN 0036-8075 (print), 1095-9203 (online)
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