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Research Article

Oil platforms off California are among the most productive marine fish habitats globally

Jeremy T. Claisse, Daniel J. Pondella II, Milton Love, Laurel A. Zahn, Chelsea M. Williams, Jonathan P. Williams, and Ann S. Bull
  1. aVantuna Research Group, Department of Biology, Occidental College, Los Angeles, CA 90041;
  2. bMarine Science Institute, University of California, Santa Barbara, CA 93106; and
  3. cPacific Region, Environmental Sciences Section, Bureau of Ocean Energy Management, Camarillo, CA 93010

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PNAS October 28, 2014 111 (43) 15462-15467; first published October 13, 2014; https://doi.org/10.1073/pnas.1411477111
Jeremy T. Claisse
aVantuna Research Group, Department of Biology, Occidental College, Los Angeles, CA 90041;
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  • For correspondence: claisse@oxy.edu
Daniel J. Pondella II
aVantuna Research Group, Department of Biology, Occidental College, Los Angeles, CA 90041;
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Milton Love
bMarine Science Institute, University of California, Santa Barbara, CA 93106; and
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Laurel A. Zahn
aVantuna Research Group, Department of Biology, Occidental College, Los Angeles, CA 90041;
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Chelsea M. Williams
aVantuna Research Group, Department of Biology, Occidental College, Los Angeles, CA 90041;
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Jonathan P. Williams
aVantuna Research Group, Department of Biology, Occidental College, Los Angeles, CA 90041;
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Ann S. Bull
cPacific Region, Environmental Sciences Section, Bureau of Ocean Energy Management, Camarillo, CA 93010
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  1. Edited by David W. Schindler, University of Alberta, Edmonton, Canada, and approved September 22, 2014 (received for review June 20, 2014)

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Significance

Secondary production is the formation of new animal biomass from growth for all individuals in a given area during some period of time. It can be a powerful tool for evaluating ecosystem function because it incorporates multiple characteristics of a population or community of organisms such as density, body size, growth, and survivorship into a single metric. Here, we find that fish communities living on the complex hardscape habitat created throughout the water column by the structure of oil and gas platforms off California have the highest secondary production per unit area of seafloor of any marine ecosystem for which similar estimates exist.

Abstract

Secondary (i.e., heterotrophic or animal) production is a main pathway of energy flow through an ecosystem as it makes energy available to consumers, including humans. Its estimation can play a valuable role in the examination of linkages between ecosystem functions and services. We found that oil and gas platforms off the coast of California have the highest secondary fish production per unit area of seafloor of any marine habitat that has been studied, about an order of magnitude higher than fish communities from other marine ecosystems. Most previous estimates have come from estuarine environments, generally regarded as one of the most productive ecosystems globally. High rates of fish production on these platforms ultimately result from high levels of recruitment and the subsequent growth of primarily rockfish (genus Sebastes) larvae and pelagic juveniles to the substantial amount of complex hardscape habitat created by the platform structure distributed throughout the water column. The platforms have a high ratio of structural surface area to seafloor surface area, resulting in large amounts of habitat for juvenile and adult demersal fishes over a relatively small footprint of seafloor. Understanding the biological implications of these structures will inform policy related to the decommissioning of existing (e.g., oil and gas platforms) and implementation of emerging (e.g., wind, marine hydrokinetic) energy technologies.

  • secondary production
  • ecosystem-based management
  • ecosystem services
  • energy technology
  • Sebastes

Footnotes

  • ↵1To whom correspondence should be addressed. Email: claisse{at}oxy.edu.
  • Author contributions: J.T.C., D.J.P., M.L., and A.S.B. designed research; J.T.C., D.J.P., M.L., L.A.Z., C.M.W., J.P.W., and A.S.B. performed research; J.T.C. and D.J.P. analyzed data; and J.T.C., D.J.P., M.L., L.A.Z., and A.S.B. wrote the paper.

  • The authors declare no conflict of interest.

  • This article is a PNAS Direct Submission.

  • This article contains supporting information online at www.pnas.org/lookup/suppl/doi:10.1073/pnas.1411477111/-/DCSupplemental.

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Oil platforms among most productive fish habitats
Jeremy T. Claisse, Daniel J. Pondella, Milton Love, Laurel A. Zahn, Chelsea M. Williams, Jonathan P. Williams, Ann S. Bull
Proceedings of the National Academy of Sciences Oct 2014, 111 (43) 15462-15467; DOI: 10.1073/pnas.1411477111

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Oil platforms among most productive fish habitats
Jeremy T. Claisse, Daniel J. Pondella, Milton Love, Laurel A. Zahn, Chelsea M. Williams, Jonathan P. Williams, Ann S. Bull
Proceedings of the National Academy of Sciences Oct 2014, 111 (43) 15462-15467; DOI: 10.1073/pnas.1411477111
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