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Science 12 September 2008:
Vol. 321. no. 5895, p. 1446
DOI: 10.1126/science.1158007
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Technical Comments

Response to Comment on "A Global Map of Human Impact on Marine Ecosystems"

Kimberly A. Selkoe,1,2* Carrie V. Kappel,1 Benjamin S. Halpern,1 Fiorenza Micheli,3 Caterina D'Agrosa,4{dagger} John Bruno,5 Kenneth S. Casey,6 Colin Ebert,1 Helen E. Fox,7 Rod Fujita,8 Dennis Heinemann,9 Hunter S. Lenihan,10 Elizabeth M. P. Madin,11 Matt Perry,12 Elizabeth R. Selig,12 Mark Spalding,13 Robert Steneck,14 Shaun Walbridge,1 Reg Watson15

Our results provide an important first step toward a full assessment of how human activities act cumulatively to affect the condition of the oceans. Fisheries (and climate change) impacts are some of the hardest to map and measure accurately. Consequently, species-specific considerations and fine-scale analyses should be left to more nuanced regional-scale replicates of our mapping framework.

1 National Center for Ecological Analysis and Synthesis, 735 State Street, Santa Barbara, CA 93101, USA.
2 Hawai'i Institute of Marine Biology, Post Office Box 1346, Kane'ohe, HI 96744, USA.
3 Hopkins Marine Station, Stanford University, Oceanview Boulevard, Pacific Grove, CA 93950–3094, USA.
4 Wildlife Conservation Society, 2300 Southern Boulevard, Bronx, NY 10460, USA.
5 Department of Marine Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599–3300, USA.
6 National Oceanic and Atmospheric Administration, National Oceonographic Data Center, 1315 East-West Highway, Silver Spring, MD 20910, USA.
7 Conservation Science Program, World Wildlife Fund–United States, 1250 24th Street, NW, Washington, DC 20037, USA.
8 Environmental Defense Fund, 5655 College Avenue, Suite 304, Oakland, CA, 94618 USA.
9 Ocean Conservancy, 2029 K Street, NW, #500, Washington, DC 20006, USA.
10 Bren School of Environmental Science and Management, University of California, Santa Barbara, CA 93106, USA.
11 Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, CA 93106, USA.
12 Curriculum in Ecology, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599–3275, USA.
13 Global Science Conservation Strategies Program, The Nature Conservancy, 93 Centre Drive, Newmarket, CB8 8AW, UK.
14 School of Marine Sciences, University of Maine, Darling Marine Center, Walpole, ME 04353, USA.
15 Fisheries Center, 2202 Main Mall, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.

{dagger} Present address: School of Life Sciences, Arizona State University, Tempe, AZ 85287–4501, USA.

* To whom correspondence should be addressed. E-mail: selkoe{at}nceas.ucsb.edu

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Science. ISSN 0036-8075 (print), 1095-9203 (online)