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Barth, John A.
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Menge, Bruce A.
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Lubchenco, Jane
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Chan, Francis
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Bane, John M.
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Kirincich, Anthony R.
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McManus, Margaret A.
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Nielsen, Karina J.
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Pierce, Stephen D.
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Washburn, Libe
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| Abstract |
- Wind-driven coastal ocean upwelling supplies nutrients to the
euphotic zone near the coast. Nutrients fuel the growth of phytoplankton,
the base of a very productive coastal marine ecosystem
[Pauly D, Christensen V (1995) Nature 374:255–257]. Because
nutrient supply and phytoplankton biomass in shelf waters are
highly sensitive to variation in upwelling-driven circulation, shifts
in the timing and strength of upwelling may alter basic nutrient
and carbon fluxes through marine food webs. We show how a
1-month delay in the 2005 spring transition to upwelling-favorable
wind stress in the northern California Current Large Marine Ecosystem
resulted in numerous anomalies: warm water, low nutrient
levels, low primary productivity, and an unprecedented low recruitment
of rocky intertidal organisms. The delay was associated
with 20- to 40-day wind oscillations accompanying a southward
shift of the jet stream. Early in the upwelling season (May–July) off
Oregon, the cumulative upwelling-favorable wind stress was the
lowest in 20 years, nearshore surface waters averaged 2°C warmer
than normal, surf-zone chlorophyll-a and nutrients were 50% and
30% less than normal, respectively, and densities of recruits of
mussels and barnacles were reduced by 83% and 66%, respectively.
Delayed early-season upwelling and stronger late-season
upwelling are consistent with predictions of the influence of global
warming on coastal upwelling regions.
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| Citation |
- Barth, J. A., Menge, B. A., Lubchenco, J., Chan, F., Bane, J. M., Kirincich, A. R., McManus, M. A., Nielsen, K. J., Pierce, S. D., & Washburn, L. (2007, March 6). Delayed upwelling alters nearshore coastal ocean ecosystems in the northern California current [Electronic version]. Proceedings of the National Academy of Sciences of the United States of America, 104(10), 3719-3724. doi:10.1073/pnas.0700462104
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| Rights Statement |
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| Funding Statement (additional comments about funding) |
- The Partnership for Interdisciplinary Studies of Coastal Oceans
is supported by the David and Lucile Packard Foundation and the
Gordon and Betty Moore Foundation. Additional support for J.A.B. was
provided by National Science Foundation Grants OCE-9907854, OCE-
0435619, OCE-0453071, and OCE-0527168. Additional support for
B.A.M. and J.L. was provided by the A. W. Mellon Foundation, the
Wayne and Gladys Valley Foundation, and the Robert and Betty
Lundeen Marine Biology Fund. This paper is Partnership for Interdisciplinary
Studies of Coastal Oceans contribution 250 and contribution
number 516 of the U.S. Global Ocean Ecosystem Dynamics program,
jointly funded by the National Science Foundation and National Oceanic
and Atmospheric Administration.
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| Additional Information |
- description.provenance : Made available in DSpace on 2012-01-05T18:29:19Z (GMT). No. of bitstreams: 1
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Previous issue date: 2007-03
- description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-01-05T18:29:19Z
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